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Darwin Correspondence Project

From George Bentham   29 November 1861

Royal Gardens Kew

Nov 29/61

My dear Darwin

The Oxalis pairs distinguished on account of the proportion of the stamens and styles, and which have nevertheless been supposed to belong to one species are according to Zuccarini

O. fulgida and rubella

O. macrostylis and tubiflora

O laburnifolia and sanguinea

O. canescens and secunda

O. gracilis and reclinata

O. cuneata and cuneifolia

(Zuccar. Nachtr. Amer. Oxal. p. 19)1 and I believe there are several others2

Yours very sincerely | George Bentham

CD annotations

1.4 O. fulgida … cuneifolia 1.9] ‘Oxalis’ added ink


CD cited Bentham concerning dimorphism in Oxalis at the end of his paper ‘On the two forms, or dimorphic condition, in the species of Primula, and on their remarkable sexual relations’, Journal of the Proceedings of the Linnean Society (Botany) 6 (1862): 77–96 (see also Collected papers 2: 62).


Collected papers: The collected papers of Charles Darwin. Edited by Paul H. Barrett. 2 vols. Chicago and London: University of Chicago Press. 1977.

Zuccarini, Joseph Gerhard. 1831. Nachtrag zu Monographie der amerikanischen Oxalis- arten. Munich.


Lists pairs of Oxalis species with differing proportions of stamens and styles.

Letter details

Letter no.
George Bentham
Charles Robert Darwin
Sent from
Source of text
DAR 109 (ser. 2): 121
Physical description
ALS 1p †

Please cite as

Darwin Correspondence Project, “Letter no. 3332,” accessed on 7 October 2022,

Also published in The Correspondence of Charles Darwin, vol. 9