170 PROCEEDINGS OF THE AMERICAN ACADEMY 



even deeply incised, the posterior more so than the anterior ones.* 

 Ovary and capsule together with the styles hairy, but the stipe gla- 

 brous : styles longer than ovary, distinct, about two thirds divided : 

 stigmas scarcely clavellate. Seed oval, sharp angled, slightly undulate, 

 nearly 0.5 line long. 



108. " Euphorbia setiloba, Engelm. in Bot. Williamson, Pacif. R. 

 R. Rep. 5, p. 364. Identical with the plant from the lower Colorado, 

 described in the report above cited. Root thick, but evidently annual ; 

 many stems from a few inches to a span long, almost verticillate from 

 the very base, an arrangement which is very striking in the Califox-nian 

 E. poJycarpa and the European E. Chamcesyce, but not so distinct in 

 most other Anisophylla. Lower leaves coarsely serrate ; upper ones 

 entire ; in the Colorado plant all nearly entire. Involucra minute, 

 scarcely a third of a line long ; the glands perpendicular, not horizontal, 

 dark red, with conspicuous white laciniate appendages. Male flowers 

 5 - 8 ; in the original specimens scarcely ever more than 3. Ovary and 

 capsule covered wath short pubescence (not hispid) ; styles nearly \ 

 line long, very slender, their branches remarkably club-shaped ; seeds 

 scarcely 0.4 lines long, sharp angled, acute, transversely rugose. — 

 Distinguished from the closely allied E. polycarpa by the slit in the 

 posterior part of the involucrum, the shape of the appendages, and the 

 more acute and much raoi*e rugose seeds. — E. setiloba has also been 

 collected by Dr. Newberry in the sandy deserts west of the lower Col- 

 orado river. 



109. "Euphorbia polycarpa, Benth. Bot. Voy. Sulph. p. 50. 

 No doubt identical with the original form, collected in the same neigh- 

 borhood, but with rather larger leaves than Bentham describes. The 

 specimens referred here by me in Bot. Mex. Bound, p. 186, undoubtedly 

 belong here, as also E. ocellata, Nutt. in Hb. Hook., from San Diego, 

 Coultex''s no. 1448 in Herb. A. Gray, and specimens collected by Dr. 

 Newberry near Los Angeles and in the Mohave desert. Mr. Boissier, 

 however, distinguished, and perhaps justly, Wright's no. 1854, from 



can collection is Amai'antus Blitum, var. grcecizans, in this Scleropus condition. As 

 specimens of the same species were mixed with no. 859 in Berlandier's reliquiae, 

 which number is the equivalent of his 2279, this may have been what Moquin took 

 for Scleropus crassipes in De CandoUe's herbarium (Prodr. 1. c. p. 271 ), from that col- 

 lection. 



* These petaloid appendages vary, in different specimens, from almost entire or 

 crenulate to laclniate-multifid. — A. G. 



