.186 C Apr ARID ACE^. Cleomella. 



C. obtusifolia, Torr. & Frem. Diffuse aud procumbent: stems a span to a foot long, 

 leafy tliroughout : leaves rather long-petioled aud the three obovate rather succulent leaflets 

 short-petiolulate, some of the upper simple aiui ratlier smaller : petals 2 or 3 lines long, spatu- 

 late : stamens exserted :' style filiform, longer or even twice longer than the ovary : stipe of 

 the fruit a (juarter or third inch long, about as long as the ascendijig pedicel and at length 

 deflexed upon it : ovary rhomboid-globose : mature capsule birostrate, the valves broadlj^ 

 conical and produced mostlv into a long and narrow beak : seeds smooth. — Frt'mout, liep. 

 311. & in Gray, PI. Wright, i. 12; Gray, Proc. Am. Acad. vii. 329; Brew. & Wats. 13ot. 

 Calif, i. 52, & ii. 433. — Saline soil, S. E. California, on and near the Mohave Desert, and 

 adjacent Arizona;^ first coll. by Fr€mont. Varies from glabrate ami (.v;ir\ smootli lo hir- 

 sute and the capsule also hirsute. 



Species not seen and of doubtful affinity. 



C* Palmerana, M. E. .Tones. Erect glabrous annual, 2 to 10 inches high, branclTed from 

 base : leaflets 3, oblong-elliptical, obtuse, mucronate ; petiole an inch or less long : lower 

 bracts leaf-like and petiolate ; the upper subulate, attenuate to hairs and tufted at base : 

 pedicels 3 to 4 lines long, reflexed in fruit : petals 2 lines long, oblong-lanceolate, obtuse, 

 veiny, orange : stameiLS slightly exceeding the petals : stipe a line long : fruit subtrnncate 

 at apex, triangular, 4 to 5 lines wide, 2 to 2^ lines high ; style half line long : seeds ovate, 

 spotted, smooth. — Zoe, ii. 236. — Green River, Utah, Jones, 9 May, 1890. Description con- 

 den.sed from the original character. 



6. WISLIZl&NIA, Eiigelm. {Dr. Adolphvs WisUzenus, the first collector, 

 after Coulter, of the original species.) — Erect and branching annuals (of the 

 Arizona-Mexican plateau), glabrous or nearly so and not glandular, usually with 

 some minute and fugacious bristles for stipules, and densely racemose small 

 yellow flowers : filiform stipe in fruit refracted on the pedicel. — Bot. App. to 

 "Wisliz. Mem. of Tour to Northern Mexico, 99; Gray, PL Wright, i. 11, t. 2, 

 & Pi'oc. Am. Acad. viii. 622. — Two species. 



"W. refracta, Engelm. 1. c. Leaves all 3-foliolate ; leaflets oblong to obovate : bracts mostly 

 very small or obsolete : stipe of fruit (juarter inch long, about the length of the pedicel, not 

 much longer than the persistent style and replum : nucumentaceous mature carpels a line 

 long, lightly reticulated and slightly tuberculate at the end. — Gray, PI. Wright, i. 12. — 

 S. New Mexico, Arizona, and S. California; first coll. by Tli, Coulter (mentioned in PI. 

 Wright. 1. c.as Cleomella Coulleri, Harvey), then by WisUzenus, Thurher, Wri(/ht, &c. 

 Recently coll. on the San Joaquin River, Parry, Cont/don, probably immigrant.'^ (Adj. Mex.) 



"W. Palmeri, Gray. Leaves so far as known all simple,'* linear or subspatulate, subsessile : 

 racemes looser: nucumentaceous carpels 2 lines long, obovate-oblong, with truncate summit 

 bordered by a row of erect tubercles, and sides striate-nervose. — Proc. Am. Acad. I.e.; 

 Brew. & Wats. Bot. Calif, i. 52. — Near the mouth of the Colorado, Arizona aud Califomia, 

 Palmer. 



7. OXYST"S^LIS, Torr. & Frem. ('O^vs, sharp, o-rvXts, column or style.) — 

 Fremont, Rep. 312.. — A single little known plant. 



O. lutea, Torr. & Frem. 1. c. 313. Nearly glabrous winter annual: stem robust, erect, a 

 foot or more high, but flowering from the base : leaves trifoliolate, long-petioled ; leaflets 

 oval, petiolulate, inch or more long, rather succulent : flowers in a capituliform sessile 

 glomemle in the axil of each leaf : petals supposed to be yellow : carpels in fruit little over 

 a line long, apparently long persi.stent on the partly excavated but imperforate indurated 

 axis or base of the spiniforra (quarter inch long) style, at length separating by a perforate 



1 Also extending to the Sacramentr. Valley, see Coville, Contrib. U. S. Nat. Herb. iv. 67. 



2 Now extending to Central California. 



8 A form with typical fruit of this species, but with slender-petioled mostly 3-foliolate leaves, has 

 been collected at Guaymas, Mex., Palvier <see Wats. Proc. Am. Acad. xxiv. 39). 



