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age and area willisAge and area

a study in geographical distribution and origin of species


John Christopher Willis

Published by Cambridge University Press, Cambridge, England.



John Christopher Willis (20 February 1868 – 21 March 1958) was an English botanist known for his Age and Area hypothesis and criticism of natural selection.

In 1896 Willis was appointed director of the Royal Botanical Gardens, Peradeniya, Ceylon (now Sri Lanka) until 1912 when he was appointed director of the botanic gardens at Rio de Janeiro. He was elected a Fellow of the Linnean Society in 1897, and a Fellow of the Royal Society in 1919. His notable publications include "A Manual and Dictionary of the Flowering Plants and Ferns" in two volumes and "Age and Area: A Study of Geographical Distribution and Origin of Species”, published in 1922. He returned to Cambridge in 1915, and later went to live in Montreux, Switzerland. He died in 1958 at the age of 90 and was posthumously awarded the Darwin–Wallace Medal by the Linnean Society.

Willis formed the Age and Area hypothesis during botanical field work in Ceylon where he studied the distributional patterns of the Ceylonese vascular plants in great detail ...

More information can be found at Wikipedia

The standard author abbreviation used to indicate this person as the author, when citing a botanical name: Willis

3 plant species named BY Willis and 26 plant species named AFTER Willis.

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3 Plant species named BY Willis

The following 3 plant species names have been described and named BY Willis (Willis)


Hydrobryum sessile Willis, Ann. Roy. Bot. Gard. (Peradeniya) i. 239.

Oreophylax Willis, Dict. Fl. Pl., ed. 4 472 (1919), nom. inval.

Willisia selaginoides Warm. ex Willis, Ann. Roy. Bot. Gard. (Peradeniya) i. 235 (1902).

26 Plant species named AFTER Willis
Updated on the 15th of May 2020

The following 26 plant species names have been described and named AFTER Willis (... willisii), (… willisiana) & (Willisia …)


6 species named AFTER Willis (… willisii)

Ardisia willisii Mez, Pflanzenr. (Engler) Myrsin. 140 (1902).

Astragalus willisii Popov, Bot. Mater. Gerb. Glavn. Bot. Sada R.S.F.S.R. 4: 155 (1923).

Brachyscome willisii P.S.Short, Muelleria 27(1): 31 (33-35; fig. 13, map) (2009).

Cryptocoryne × willisii Reitz, Wochenschr. Aquar.- Terrarienkunde 39: 523 (1908).

Cryptocoryne willisii hort. ex A.Chev., Rev. Bot. Appl. Agric. Trop. 1934, xiv. 482, nomen.

Epilobium willisii P.H.Raven & Engelhorn, New Zealand J. Bot. 9(2): 347 (1971).

Erythranthe willisii G.L.Nesom, Phytoneuron 2017-17: 7 (2017).

Eucalyptus willisii Ladiges, Humphries & Brooker, Austral. J. Bot. 31(6): 583 (1983) (1983).

Eucalyptus willisii subsp. falciformis Newnham, Ladiges & Whiffin, Austral. J. Bot. 34(3): 348 (1986) (1986).

Eucalyptus willisii subsp. willisii Ladiges, Humphries & Brooker, - .

Grevillea willisii R.V.Sm. & McGill., Muelleria 3(2): 102 (1975).

Grevillea willisii subsp. pachylostyla McGill., New Names Grevillea 16 (1986).

Grevillea willisii subsp. willisii R.V.Sm. & McGill., New Names in Grevillea (Proteaceae) (1986).

Hakea willisii (R.V.Sm. & McGill.) Christenh. & Byng, Global Fl. 4: 92 (2018).

Halicacabus willisii (Popov) Nevski, Trudy Bot. Inst. Akad. Nauk S.S.S.R., Ser. 1, Fl. Sist. Vyssh. Rast. 4: 216 (1937), in obs.

Strobilanthes willisii Carine, Kew Bull. 55(4): 971 (2000).

Tecticornia willisii K.A.Sheph., Nuytsia 29: 141 (2018).

6 species named AFTER Willis (… willisiana)

Chionogentias muelleriana subsp. willisiana L.G.Adams, Austral. Syst. Bot. 8(5): 959 (1995) (1995).

Gaultheria willisiana Davie, J. Bot. 55: 219 (1917).

Gentianella muelleriana subsp. willisiana (L.G.Adams) Glenny, New Zealand J. Bot. 42(3): 519 (2004).

Goodenia willisiana Carolin, Telopea 3(4): 531 (1990).

Griffithella willisiana Warm., Kongel. Danske Vidensk.-Selsk. Skr. ser. 6, 11: 13 (-14; fig.) (1901).

Heliconia willisiana Abalo, Phytologia 52: 412, fig (1983).

3 species named AFTER Willis (Willisia …)

Willisia Warm., in Danske Vid. Selsk. Skrift. Ser. VI. xi. 58 (1901).

Willisia arekaliana Shivam. & Sadanand, Kew Bull. 52(1): 243 (1997).

Willisia selaginoides Warm. ex Willis, Ann. Roy. Bot. Gard. (Peradeniya) i. 235 (1902).

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