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the Horticultural HISTORY OF the CANARY ISLAND DATE PLAM
SCOTT ZONA
THE HORTICULTURAL HISTORY OF THE CANARY ISLAND DATE PALM
(PHOENIX CANARIENSIS)
In the mid- to late nineteenth century, the Canary Island date palm (Phoenix Canariensis,)
became one of the most widely cultivated ornamental palms in the world. In Southern
Europe it became a symbol of wealth, privilege and sunny holidays, especially along the
Côte d'Azur in France. In the United States, in Florida and California, it was a popular
landscape palm for both small homes and large estates, a symbol of gracious living at
whatever economic stratum. It has a recognizable habit and was often photographed, so
the rise in popularity of this palm can be traced through written records, postcards and
historic photographs.
INTRODUCTION
Of all the endemic plants of the Spanish Canary Islands, Phoenix canariensis Chabaud
(Arecaceae) is surely the most widely cultivated outside its island home (Figure 1). The
dragon tree (Dracaena draco) may be more emblematic of the islands, but its cultivation
is generally confined to botanical gardens and specialist collections. In contrast, P.
canariensis is cultivated by the tens of thousands in warm temperate areas around the
world. It is a magnificent palm, well fitted to lining avenues, flanking entrance ways, and
serving as a focal point in formal landscapes. Its size and symmetry are well suited to
large, expansive landscapes and gardens, but its ease of propagation and growth make it
accessible even to gardeners of modest means.
DISCOVERY
The Canary Islands have been known to European and African mariners since at least
the first century when Juba II, King of Mauretania (c.25 BC-AD c.23), travelled to the
islands.1 Pliny the Elder (AD 23-79) related Juba's account of the islands and credited
Juba II as their discoverer, a distinction which may be an overstatement. Nevertheless,
Juba II was surely the first scholar to write about the islands and bring them, and their
remarkable flora, to the attention of the Roman scholars. He described the Canary Islands
as abounding in 'palm-groves full of dates ... in addition to this there is a large supply of
honey'.2 At that time, and for many centuries thereafter, the palms of the Canary Islands
were not distinguished from the true date palm (Phoenix dactylifera L.), which was
common and well known in the Mediterranean region. Juba's notice of 'honey' may be
the earliest mention of the practice of extracting sugary sap (known locally as guarapo),
which, even today, is fermented into alcohol or boiled down to make 'honey' (or syrup).3
Although the difference between the fruits of the Canary Island date palm and those of
the true date palm were surely obvious during the subsequent colonization of the Canary
Islands, the former species was not given any taxonomic status until Philip Barker- Webb
and Sabin Berthelot named it Phoenix dactylifera var. jubae, in honour of Juba II. That
name, however appropriate, was replaced by P. canariensis, the name by which the palm
was known to European horticulturists, when it was recognized as a distinct species, not
just a variety of P. dactylifera.4 J. Benjamin Chabaud described and illustrated Phoenix
canariensis hort. ex Chabaud in 1882 from plants growing in Hyères, France, grown from
seeds sent from Oratava, Canary Islands. Phoenix dactylifera var. jubae was published
in 1847, but it was not given specific status until H. Christ elevated it to species rank
as P. jubae (Webb & Berthel.) Webb ex H. Christ. The law of nomenclatural priority,
which states that the oldest properly published name is the one that must be used, applies
only within a rank, so P. canariensis (1882) has priority over P. jubae (1885). Phoenix
canariensis is the correct name for the indigenous date palm of the Canary Islands.5
INTRODUCTION TO HORTICULTURE
Records of the introduction of Phoenix canariensis into the gardens of the world are
poor. The difficulty in tracing its introduction to cultivation arises from the fact that early
botanists and horticulturists did not distinguish the Canary Island date palm from the true
date palm (P. dactylifera). Hence, William Aiton did not list P. canariensis in his catalogue
of the plants at the Royal Botanic Garden in Kew, nor was the species mentioned in John
Claudius Loudon's encyclopaedic listings of plants cultivated in England, although P.
dactylifera and other species were mentioned in every list. In reviewing historical plant
lists, only when we have evidence that the listed palm came from the Canary Islands can
we be reasonably sure that it is P. canariensis.6
In addition to confusion with Phoenix dactylifera, there was confusion with other
species. Chabaud noted that a nursery in Gand, Belgium, sold P. canariensis under the
name P. reclinata, the Senegal date palm, a distinctive multi-stemmed species from Africa.
The material sold by the Belgian nursery originated from the Royal Botanic Gardens,
Kew. Chabaud quoted a letter from Joseph Dalton Hooker, dated 11 December 1882,
in which Hooker thanked Chabaud for a reprint of his publication of P. canariensis and
said 'Your Phoenix canariensis looks like our Phoenix reclinata^1 George Nicholson, in
a late nineteenth-century dictionary of gardening, listed Phoenix tenuis Verschaff., but
in a supplement he said that the correct name for P. tennis was P. canariensis.8 Thus,
the confusion of names suggests that P. canariensis was in cultivation in England and
elsewhere well before it was known by its current name.
The earliest documented introduction of the Canary Island date palm into mainland
European gardens was by Norwegian botanist Christen Smith (1785-1816). Smith
botanized extensively in the Canary Islands in the early nineteenth century. During a stay
in Tenerife in 1815, in the autumn when few other wild plants were blooming, Smith
collected seeds for the botanical garden in Oslo, whose collection he was responsible for
developing. At least one P. canariensis palm grew from those seeds and survived in the
glasshouse in Oslo until 2000. The tree became known as Christen Smith's palm.9 The
ornamental value of P. canariensis was recognized and seeds of the palm were brought
from the Canary Islands to European gardens. The palm was introduced into Nice, at
the garden of Viscount Joseph de Vigier (1821-1894) in 1866, from plants purchased
from Verschaffelt's Nursery in Ghent, Belgium.10 Emile Sauvaigo fixed the date at 1864.11
Chabaud claimed the year was 1 864 and the place of origin was the J. J. Linden Nursery.12
Another source put the date of introduction at 1868.13 Nice was, even then, famous for
its palm-lined promenades and picturesque vistas and Viscount Vigier's estate, known as
the Venetian Palace, was an exact reproduction of the Moncenigo Palace at Venice. Vigier
was an officer in charge of horses for Napoleon III and his wife was the celebrated opera
star Sophie Cruvelli (née Jeanne Sophie Charlotte Cruwell, 1826-1 907). 14 Soon after
Viscount Vigier's introduction of P. canariensis to Nice, the palm was widely planted
along the Mediterranean coast, where it still enjoys tremendous popularity.15
A photograph of the species growing in the Polytechnic School in Lisbon, where it
was introduced before 1881, was published by Godefroy-Lebuef and is the first published
photograph of the species.16 P. canariensis is listed in the 1888 catalogue of plants in
Baron Ricasoli's garden in Porto Èrcole, Italy.17 Tresco Abbey Gardens on the Isles of
Scilly acquired P. canariensis in 1894. This species is now very prolific throughout the
garden (Figure 2) and very much a signature plant.18 By the end of the nineteenth century
P. canariensis was well established in European horticulture and landscapes (Figure 3).
PHOENIX CANARIENSIS IN THE AMERICAS
Unlike Phoenix dactylifera, which Spanish conquistadors brought to the Caribbean no
later than 1513,19 P. canariensis arrived in the Americas much later. In the eighteenth
century P. canariensis was regarded as an inferior form of P. dactylifera. Early Spanish
colonists were more concerned with growing food crops than they were creating palm-
lined avenues and stately gardens; hence, they had no reason to import a palm such as
P. canariensis, which produced no edible fruits. One account, which is widely repeated
in the popular media, claims that the Franciscan priest and founder of the California
mission system, Father Junípero Serra (1713-84), brought P. canariensis to Mexico
and California.20 He is even purported to have stopped off in the Canary Islands on his
way from Spain to Mexico in 1749, and there he is said to have collected seeds of the
palm. The story is totally apocryphal. Early missionaries were more concerned with crop
plants than ornamental palms.21 The story likely confuses the Canary Island date palm
with the true date palm, which was cultivated in the eighteenth century by missionaries,
although not always with great success. While there is evidence that the true date palm
was brought to Junípero Serra's Mission, San Diego de Alcalá, in 1769, there is no record
of P. canariensis growing in any of the early missions.22 Serra's biographers recount that
he travelled from Cadiz to the Caribbean without stopping in the Canary Islands, nor
is there any record placing P. canariensis in California before the nineteenth century.23
While Padre Serra laboured in the vineyards of the Lord, he did not do so under the shade
of the Canary Island date palm.
The credit for introducing P. canariensis goes to the early California nurserymen. The
first nursery to offer P. canariensis for sale in California was the nursery of Miller and
Sievers in San Francisco in their 1 874 catalogue.24 That same year it was also offered by the
San José nursery of Bernard S. Fox.25 Note that this predates Chabaud's 1882 publication
of the species epithet, an indication of the widespread use of the name P. canariensis by
nurserymen and horticulturists. The subsequent rise in popularity of P. canariensis in
California was probably the result of the pioneering efforts of John Rock (1836-1904),
who established a nursery near San José in Santa Clara County in 1865 and relocated
it to Niles in 1884, where it became the famous California Nursery Company. Rock
offered P. canariensis in his 1882 catalogue. After Rock's death, the California Nursery
Company continued to supply palms throughout California. It famously supplied over
one hundred mature P. canariensis palms to line the 'Palm Avenue' of the Panama-Pacific
International Exposition, held in San Francisco in 1915 (Plate X).26
Nurseryman Ralph Kinton Stevens maintained his home and commercial nursery on
the property now occupied by Lotusland, an estate garden famous for its palms in Santa
Barbara, California. Stevens offered P. canariensis for sale in his 1891 and 1892 nursery
catalogues. Whether they were grown from seeds produced locally or procured from
overseas is not documented. His 1893 catalogue lists P. canariensis, as well as the same
species under the names P. reclinata (misapplied) and P. tennis. Bill Dickenson estimated
that a specimen in Whittier, California, with a trunk over 30.5 m (100 feet) tall, was
planted a 1890. Another extraordinary planting of palms is found in the vicinity of Los
Angeles, California, in the Chavez Ravine Arboretum. The Arboretum, with its Avenue
of Palms, was founded in 1893. In Pasadena, the Huntington Botanical Gardens, the
former estate of railroad magnate Henry Huntington, has a significant specimen that it
acquired in 1906 as a large palm from Huntington's uncle who lived in San Francisco.27
In Florida, the first documented introduction of P. canariensis was made by pioneering
nurseryman Henry Nehrling (1853-1929) who obtained seeds for his central Florida nursery
in 1886. He obtained seeds from the French Riviera and, later, directly from the Canary
Islands. Nehrling had a profound influence on the horticultural palette of Florida, so it
is likely he did much to popularize this species.28 By 1890, P. canariensis was listed in the
catalogue of the Royal Palm Nursery operated by brothers Pliny and Egbert Reasoner in
Manatee, Florida. The nursery, which still exists and is still run by the Reasoner family, is
one of the most famous nurseries in the State and was extremely influential in providing
landscaping material for Floridians. Through the collecting efforts of Walter T. Swingle, the
US Department of Agriculture's Office of Seed and Plant Introduction received seeds of P.
canariensis from southern France in 1898 as Plant Introduction #1949. Swingle noted that
although the species was commonly cultivated in California, it was not yet common in the
south-eastern USA, where he correctly predicted it would thrive.29 By the turn of the twentieth
century P. canariensis was well established in the nursery trade in the USA. Postcards and
historical photographs documented the ubiquity of this palm in American landscapes. By
1903 the palm had become so ubiquitous that Ernest Braunton was moved to write:
The most popular Palm for the masses, who look for grace and beauty combined with
cheapness, is P. canariensis. More of these are planted at present than any other three
species. In Los Angeles and vicinity they may be counted by the tens of thousands.30
Elsewhere in the Americas P. canariensis began appearing in twentieth-century catalogues
of botanical gardens and, by 1910, it was listed in the catalogue of plants at the botanical
garden of Buenos Aires, Argentina.31 Robert Grey reported it in the collection of the
Harvard Botanical Gardens in Cienfuegos, Cuba, although the date of its acquisition is
not given. If the palm thrived in botanical gardens, it soon spread to the local nursery
trade and from there to local gardens.32 For the remainder of the twentieth century the
Canary Island date palm was a popular and widely grown ornamental palm throughout
the Americas wherever the climate was mild.
PHOENIX CANARIENSIS IN AUSTRALIA
The Canary Island date palm reached the shores of Australia in the mid- to late 1800s.
The species was planted on a trial basis in Centennial Park, Sydney, under the directorship
of Joseph Maiden in 1908, before being were widely adopted elsewhere in Sydney. Some
of those original palms have succumbed to disease, but many are still present in Sydney.33
Several documented ceremonial plantings of P. canariensis were made in the botanic
garden of Melbourne. Records indicate the species was absent from the garden as late as
1883.34 On 26 September 1903 a Canary Island date palm was planted by Lady Clarke,
wife of Sir George Sydenham Clarke, who was Governor of Victoria from 1901 to 1903.
Subsequent plantings were made by the Victoria League in 1909 and Viscount Horatio
Kitchener, a hero of the Boer War, in 1910. 35 The oldest specimen of P. canariensis in the
botanic garden of Adelaide is said to predate the establishment of the garden, which was
in 1855.36 This early date of introduction seems highly unlikely, in light of the palm's
dissemination through the horticultural world in the second half of the nineteenth
century. The species was planted at some of the oldest homes in Perth in south-western
Australia in the 1880s.37
PHOENIX CANARIENSIS UNDER GLASS
Palms have always been favourite subjects in large, heated conservatories, both public and
private. Although its large size did not recommend it for glasshouse culture, P. canariensis
was brought into cultivation under glass in many parts of the world where it could
not grow outside (see Christen Smith's palm, above). For example, the Buffalo and Erie
County (New York) Botanic Gardens' South Park Conservatory planted P. canariensis in
1902, but removed the tree eighty-one years later when it threatened to grow through the
glass roof.38 The botanical garden of Geneva, Switzerland, received its first P. canariensis
in 1900, but by 1983 the palm was absent from the collection.39
SIGNIFICANCE
Like so many plants entering horticulture in the mid-nineteenth century, palms were
both a symbol of the vastness and richness of the world and of imperial or cultural
hegemony. As the USA and the countries of Europe (especially Britain) broadened their
political reach, new plants arrived on the horticultural scene in breathtaking abundance.
Palms were particularly emblematic of the exotic tropics and their 'inevitable' conquest.
P. canariensis achieved popularity as an ornamental palm even before the species was
formally named in 1882. Its rise in popularity in Europe coincided with the popularity
of subtropical and glasshouse gardening in Victorian England, as well as the botanical
interchange among the many colonies of the British Empire, France and Spain.40 The
palm gained popularity in the French and Italian Rivieras just at the time, the 1860s,
when those areas became increasingly important centres for tourism in Europe. There the
palms soon symbolized, by association, lifestyles of glamour, elegance and wealth.
In the southern USA, California, Southern Europe and Australia, palms were already
part of the landscape when P. canariensis arrived. Native palms, such as Washingtonia
filifera in California, Livistona australis in New South Wales, and Sabal palmetto in
Florida, were both wild and cultivated. P. canariensis was readily accepted in these places,
where, as in the Bay Area of California, the prevailing gardening ethos was one of eclectic
inclusiveness, using both native and exotic species in landscapes that had both naturalistic
and geometric elements.41 Equally important was the fact that, in these frontier areas,
gardens were large enough to accommodate large, ornamental palms.
Outside of Southern Europe, P. canariensis achieved popularity with both the
upper and middle classes. In Florida, the demand for P. canariensis arose at a time when
Florida was being settled as a winter vacation destination for wealthy industrialists of
America's Gilded Age (1878-89). Henry Flagler's Florida East Coast Railroad began
delivering tourists to Palm Beach in 1894 and to Miami in 1896 and, soon thereafter,
wealthy residents demanded stately palms for their stately winter homes. Nothing says
'stately' like P. canariensis. Estate architecture in Florida looked to the warm countries of
Mediterranean Europe for its inspiration and validation; likewise, landscape architecture
emulated the Mediterranean and its palms. The use of the palm in California coincided
with the post-Gold Rush (1849) economic boom and the widespread settlement of the
West. The palm prospered in California in the second half of the nineteenth century at
a time when newly wealthy landowners, who made their fortunes in agriculture, real
estate, transportation, mining or servicing miners, sought to build grand estates.42
By the latter half of the nineteenth century gardens of the middle classes were not
dedicated solely to providing food and medicine; ornamental plants were grown in
abundance. Middle-class gardeners found in P. canariensis a palm that was both elegantly
exotic and easy to grow. Seeds gathered from fruiting palms in public parks or cemeteries
grew readily in less expansive gardens. Alternatively, the palm was readily available from
nurseries. In California, the completion in 1905 of the aqueduct that brought water from
the Colorado River into the Los Angeles Basin ushered in a boom of middle-class home
ownership, which had a democratizing effect on gardening. Home owners of modest
means could convincingly emulate the larger gardens of the state's wealthiest citizens. P.
canariensis symbolized those aspirations.
All these factors fostered demand for large, imposing palms, a demand that P.
canariensis was ideally suited to fill. Whether for majestic avenues, lofty civic buildings,
or lush, subtropical pleasure gardens, P. canariensis was the palm of choice. Beginning in
the last decades of the nineteenth century, the Canary Island date palm became one of the
most popular palms in cultivation. Its popularity continues to this day.
REFERENCES
1 The ancient kingdom of Mauretania comprised an area corresponding to western
Algeria and northern Morocco; it is not to be confused with the modern country of Mauritania.
2 Harris Rackham, Pliny's Natural History, Vol. II: Books III-VII (Cambridge: Harvard University Press,
1947), bk VI, 1.205, p. 491.
3 Antonio Quintero Lima, Miel y Palma (Tenerife: Consejería de Agricultura y Pesca, Gobierno Autónomo de Canarias, 1985), p. 29.
4 Philip Barker- Webb and Sabin Berthelot, Histoire Naturelle des Iles Canaries (Paris: Chez Mellier Père, 1847), 3(2): 289.
5 J. Benjamin Chabaud, La Phoenix canariensis', La Provence Agricole et Horticole Illustrée, 19 (1882), pp. 293-7, figs 66-8 (p. 293); Rafaël Govaerts and John Dransfield, World Checklist of Palms (Kew: Royal Botanic Gardens, Kew, 2005), p. 170
6 William T. Aiton, Hortus Kewensis, 2nd edn (London: Longman, Hurst, Rees, Orme,
& Brown, 1813), V, p. 369; John Claudius Loudon, London's Hortus Britanniens. A Catalogue of All the Plants Indigenous, Cultivated in, or Introduced to Britain (London: Longman, Rees, Orme, Brown, & Green, 1830), p. 396; Sweet's Hortus Britannicus: or a Catalogue of All the Fiants Indigenous or Cultivated in the Gardens of Great Britain, Arranged According to the Natural System ... (London: J. Ridgway, 1839), p. 715; James Donn, Hortus cantabrigiensis: Catalogue of Indigenous and Exotic Plants
Cultivated in the Cambridge Botanic Garden, 13th edn (London: Longman & Co., 1845), dp. 655-6.
7 J. Benjamin Chabaud, Les Palmier de la Côte d'Azur (Paris: Librairie Agricole de la Maison Rustique, 1915), p. 137.
8 George Nicholson, Illustrated Dictionary of Gardening, Vol. Ill: P to S (London: L. Upcott Gill, 1884-88), p. 105; The Century Supplement to the Illustrated Dictionary of Gardening, vol. G-Z (London: L. Upcott Gill, 1900), p. 597.
9 Per Sunding, Christen Smith's Diary from the Canary Islands and his Importance for the Cañarían botany (available at: http://humboldt. mpiwg-berlin.mpg.de/10b.sunding.htm). Also http://www.nhm.uio.no/botanisk/palmen/ (accessed on 12 September 2007).
10 Giorgio Roster, Le Palme Coltivate o Provate in Piena Aria nei Giardini d'Italia (Florence: M. Ricci, 1915), p. 74.
11 Emile Sauvaigo, Les Cultures sur le Littoral de la Méditerranée (Paris: J.-B. Baillière & fils, 1894), p. 147.
12 Chabaud is in error as Linden did not purchase the nursery from Verschaffelt until 1869.
13 Giardini de Sanremo (San Remo: Comune di Sanremo, 2001), p. 47.
14 R. Davey, 'Nice', Lippincott's Magazine of Popular Literature and Science, 15(88) (April 1875), pp. 434-44 (p. 436).
15 Chabaud, Les Palmier de la Côte d'Azur p. 136; Jean-Christophe Pintaud, 'From Barcelona to Bordighera: palm gardens on Mediterranean shores', Palms, 46(3) (2002), pp. 149-53 (p. 150).
16 Alexandre Godefroy-Lebeuf, Phoenix canariensis, Le 1 ardin, 1 (1887), p. 67.
17 Rolf Kyburz, 'Discovering palms in Europe', Principes, 33(1) (1989), pp. 40-4 (P. 41).
18 Mike Nelhams, Tresco Abbey Gardens, personal communication, 16 August 2005.
19 Hilda Simon, The Date Palm: Bread of the Desert (New York: Dodd, Mead, 1978). p. 83.
20 Victoria Padilla, Southern California Gardens: An Illustrated History (Berkeley: University of California Press, 1961), p. 228; Henry Donselman, How Did They Get Here? (available at: http://www.homestead.com/ donselman/page5.html) (accessed on 10 August 2005); J. Richter, 'Palms up! Only one kind is native to the state, but California is defined by these trees', San Francisco Chronicle (30 June 2005) (available at: http://sfgate.com/cgi-bin/ article. cgi?f=/c/a/2005/07/30/HOGP0DUFFQl.
DTL) (accessed on 11 September 2007).
21 Missionaries also needed date palm leaves to celebrate Palm Sunday, so date palms served a dual purpose in the early mission gardens; Paul Popenoe, The Date Palm (Miami: Field Research Proiects, 1973). p. 18.
22 Simon, Date Palm. p. 86.
23 William W. Dunmire, Gardens of New Spain (Austin: University of Texas Press, 2004), p. 302; Peter Thomas Conmy, Miguel José Serra, Padre Junípero, OFM (San Francisco: Grand Parlor of the Native Sons of the Golden West, 1960), pp. 13, 14; Don DeNevi and Noel Francis Moholy, Junípero Serra: The Illustrated Story of the Franciscan Founder of California's Missions (San Francisco: Harper & Row, 1985), p. 36.
24 Thomas A. Brown, personnal communication. 1 September 2005.
25 David C. Streatfield, '"Paradise" on the frontier: Victorian gardens on the San Francisco peninsula', Garden History 12(1) (1984), pp. 58-80.
26 H. Danaher and N. Kirk, 'Palm paradise', Tri-City Voice (Freemont) (13 April 2004) (available at: http://www.tricityvoice.com/ articledisplay.php?a=2386) (accessed on 13 September 2007).
27 Bill Dickenson, 'Phoenix photo perils', Palm Journal, 122 (May 1995), pp. 44-6 (p.45); Lili Singer, 'Where roots run deep', Los Angeles Times (7 July 2005) (available at: http://www.latimes.com/features/printedition/ home/la-hm-chavez7jul07,l, 6591 85. story)
(accessed on 15 August 2005).
28 Henry Nehrling, The Plant World in Florida (New York: Macmillan, 1933), pp. 142, 144.
29 US Department of Agriculture, Section of Seed and Plant Introduction, Inventory 5 of Foreign Seeds and Plants (Washington, DC: Government Printing Office, 1899), entry '1949', p. 9.
30 Ernest Braunton, 'Hardy palms in California', in Cyclopedia of American Horticulture, 2nd edn by Liberty Hyde Bailey (New York: Macmillan Co.. 1903). p. 1194.
31 Carlos Thays, El Jardín Botánico de Buenos Aires (Buenos Aires: Jacobo Peuser, 1919), p. 163.
32 Robert M. Grey, Report of the Harvard Botanical Gardens, Soledad Estate, Cienfuegos, Cuba (Atkins Foundation) 1900-1026 (Cambridge: Harvard University Press, 1927), p. 66.
33 Paul Ashton and Kate Blackmore, Centennial Park: A History (Kensington: New South Wales University Press, 1988), p. 109.
34 William R. Guilfoyle, Catalogue of Plants Under Cultivation in the Melbourne Botanic Gardens (Melbourne: Government Printer 1883), p. 120. Phoenix canariensis was not listed among the many other species of Phoenix cultivated in the gardens.
35 Anon., Royal Botanic Gardens, Melbourne, Australia (Melbourne: M. M. Gibson (Gardens) Trust, 1961), n.p.
36 Cliff Sawtell, personal communication, 22 August 2005.
37 Kingsley Dickson, personal communication, 20 August 2005.
38 Jean Gier, A Historical Look at the Buffalo and Erie County Botanical Gardens (Buffalo: Buffalo & Erie County Botanical Society, 1990) (available at: http://www.buffalogardens.com) (accessed on 11 September 2007).
39 Bastian Bise, Fred Stauffer and Pierre Matille, 'Palms at the botanical garden of Geneva, Switzerland', Palms, 50(1) (2006), pp. 39-48.
40 Jim Reynolds, '"Palm trees shivering in a Surrey shrubbery" - a history of subtropical gardening', Principes, 41(2) (1997), pp. 74-83 (p. 76).
41 Dianne Harris, 'Making gardens in the Athens of the West: Bernard Maybeck and the San Francisco Bay region tradition in landscape and garden design', in Marc Treib (ed.), Regional Garden Design in the United States (Washington, DC: Dumbarton Oaks Research Library & Collection, 1995), pp. 43-68 (p. 56).
42 Streatfield, 'Paradise" on the frontier', p. 69