GATOPHTTUM AND BOISDUVALIA. H5 



97 ; Truckee, Sonne, 1886, 112, and Brandegee, July 1884; 

 Bartlett Mt., Brandegee, June 1884; Snow Mt., Brandegee, 

 June 1891; Sequoia Mills, Brandegee, July 1892). 



G. strictum y Gray, Proc. Amer. Acad. vii. (1867), 34 

 Watson (Bibl. Index, 363), and the type specimens, 

 Torreyi. 



The genus Gayophytum was founded on a South Amer- 

 ican species, G. humile Juss.,* of Chili and Peru. The 

 original plate of Jussieu, and Gay's plate for a tracing of 

 which I am indebted to Mr. Hemsley, show that this species 

 is nearly identical with G.pumilum, having flattened cap- 

 sules with numerous oblique seeds. Specimens referable 

 here occur in the herbarium of the California Academy, 

 from the mountains about Santiago, as G. humile Juss. and 

 G. densifolium Ph., and it may be questioned whether 

 study of additional material may not necessitate the adop- 

 tion of Jussieu's name for the North American plant which 

 now bears the name of pumilum. G. micranthum Hook. 

 & Arnott, in Hook. Bot. Miscell. iii. 311 (Oenothera 

 micrantha Presl, Eel. Haenk. ii. 31 1), which is generally 

 held to be the same as humile, is represented in the Gray 

 herbarium by a fragment from Hooker, which has the 

 elongated internodes, dichotomous habit, clavate torulose 

 capsules on filiform pedicels, and few large dark seeds, of 

 the ramosissimum group, and from this fragment one would 

 hesitate to call it different from the latter, but it is pos- 

 sible that some error has occurred in the labeling. Appar- 

 ently of a single species, separable from humile, are the 

 following specimens in the herbarium of the California 

 Academy, from the Andes near Santiago : — G. minutum, 

 Ph., G. gracile, Ph., and G. robustum, Ph., — all of which 

 appear more closely related to caesium than to any other 

 species. I am disposed to think that these (together with 



* Jussieu, Ann. Sc. nat. 1832, xxv. 18, pi. 4; Gay, Flora Chilena, ii. 



324, pi. 22. 



t Dating from 1825, as Mr. Hemsley informs me. 



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