CRUCIFER^. 247 



2. C. platycarpa, Torr. Bot. Wilkes Exp. 235. t. 2 (1873). Size and 

 habit of the last, but pubescent and glandular: leaflets 3, broadly oblong 

 to lanceolate, 6 8 lines long, obtuse or acutish : sepals linear-setaceous : 

 pod -^4 in. long, ly in. broad : seeds 10—12 : style 2 lines long. — Range 

 of the preceding. 



3. CLEOMELLA, De Candolle. Habit of Cleome; flowers smaller; 

 leaves 3-foliolate. Pod short and few-seetled, ovoid or rhomboidal, the 

 valves often produced laterally into horn-like appendages. 



1. C. obtusifolia, Torr. Frem. Eep. 311 (1845). Pubescent, very much 

 branched from the base, % — 2 ft. high : leaflets oval or oblong, }^ — 3^ 

 in. long, equalling the petioles, glabrous above ; stipules long and fim- 

 briate : fl. small, in leafy racemes : sepals ovate, lacerate-ciliate : petals 

 1 — 2 lines long : pods 2 — 5 lines broad, the valves acutely and often 

 slenderly horned : style very slender, 2 lines long : stipe 3 lines, reflexed 

 upon the pedicel. — Common along the northern and western borders of 

 of the Mohave Desert, but said to have been found in the first place 

 near Sacramento, Fremont., but there may be an error as to that locality. 



4. WISLIZENIA, Engelmann. Habit, foliage and flowers of Cleomella, 

 but the pod didymous; valves contracted each upon its one seed and 

 forming a n^^t-shell-like covering to it, nerved and reticulated; style 

 elongated. 



1. W. refracta, Engelm. Wisliz. Eep. 14 (1848); Gray, PI. Wright, i. 

 11. t. 2 (1853). Erect, branching, 1—2 ft. high: leaflets 3, obovate to 

 oblanceolate, 5 — 9 lines long, usually surpassing the petioles: racemes 

 dense, in age elongated: petals 1 line long: stamens and ovary exserted: 

 cells of the ovary 2-ovuled: fr. 1}{ lines broad; the divergent obovate 

 reticulate valves separated by a perforated partition: style persistent, 

 1 — 2 lines long: stipe 2 — 3 lines, strongly refracted upon the pedicel. — 

 Common at Lathrop, and near Sacramento; also at the south. 



Order XLIII. CRUCIFER/E. 

 Adanson, Fam. ii. 409 (1763); Jussieu, Gen. 237 (1789). 



Herbaceous or rarely suffrutescent plants with watery pungent juice, 

 alternate exstipulate leaves, and usiially racemose white or yellow or 

 sometimes purple flowers. Sepals 4, imbricate, deciduous. Petals 4, 

 often unguiculate, the laminae spreading in the form of a cross (unequal, 

 and differently arranged in many of our Slrepianlhi), hypogynous, 

 deciduous. Stamens almost always tetradynamous, i. e., 4: long, 2 short 

 (except in some Sireplanthi, where they are in 3 imequal pairs, and in 

 Athysanus and Helerodraba, which have them all of equal length); in 



