174 CRUCIFEILE. Thebjpodlum. 



purple white or very rarely yellow flowers (mostly smaller than in Caidanthus) 



usually in rather dense racemes. — Gen. 876 ; Wats. Bot. King Exp. 25, & Bibl. 



Index, 7-2 ; Brew. & Wats. Bot. Calif, i. 37 ; Prantl, 1. c. 155. Pachypodium, 



Nutt. in Torn & Gray, Fl. i. 96; Beuth. «fe Hook. Gen. i. 81. [By B. L. 



Robinson.] 



§ 1. Hesperidanthus. Stigma ovate, entire, with a more or less conical 



apex : flowers large, purple : petals with obovate blade : cauline leaves narrow, 



not auriculate. 



T. linearifolium, Watson. An erect smooth perennial, 2 or 3 feet higli, with pale foliage 

 ' ami somewhat curymbosely branched above : basal leaves obovate, sharply toothed, not per- 

 sisting ; cauline linear or linear-oblong, entire, ascending : petals showy, rose-purple, slender- 

 clawed, 10 hues in length : pods slender, 2 to 3 inches long, ascending or erect upon slender 

 spreading pedicels. — Bot, King Exp. 25 ; Proc. Am. Acad. xvii. 321. Streptanthus lineari- 

 folkis, Gmv, ri. Fendl. 7. lodanthus or Pacfu/podium linearifolium, Gray, Proc. Am. Acad, 

 vi. 187. — Colorado to Texas and Arizona. (Northern Mex.) A species without close 

 affinities in the genus and Avith flowers and stigma somewhat of Hcsperis matronalis. 



§ 2. Euthelypodium; Style slender or short and thick, or obsoletfe, truncate 

 or slightly 2-lobed ; stigmatic surface circular or elongated over the valves (ex- 

 cept in T. elegans) : pubescence simple or none. 



* Upper cauline leaves sessile, cordate, or auriculate : jjedicels very short, almost none : 

 siliques arcuate, strongly deflexed. 



T. Cooperi, Watson. Slender erect annual: stems terete, flexuous, glabrous, usually 

 branclied, 8 'inches to 1| feet in height : leaves thickish, oblong, obtusisli, the basal shallowly 

 few-toothed, the others entire, cordate, or sagittate with clasping lobes ; the upjjermost and 

 rameal leaves narrower, lance-linear ; aU tending to fall off, leaving the stem quite naked at 

 fruiting : flowers small : sepals 1^ to 2 lines long, somewhat exceeded by the purplish petals ; 

 the latter narrower than usual in the genus : siliques H inches long, attenuate at the end, 

 commonly falcate, somewhat scabrous with fine stiff hairs. — Proc. Am. Acad. xii. 246, & 

 Bibl. Index, 451. T. — ? Brew. & Wats. Bot. Calif, i. 38. — S. E. California, Fort 

 Mohave, Cooper ; Mohave River, Palmer ; Cashenberry Springs, Mohave Desert, Parish ; 

 Inyo Co., Coville & Funston ; Colorado Desert, Orcntl ; Arizona, Palmer ; fl. April to June. 

 A very distinct species, suggesting by its habit and fruiting racemes Arahis longirostris, Wats. 



* * Upper cauline leaves sessile, cordate-clasping or auriculate at the base : capsules erect, 

 ascending or widely spreadiTig, 6 to 15 lines in length (the mature fruit of T. eucosmum 

 still unknown, perhaps somewhat longer). 



H- Flowers even in anthesis snbspicate or racemose, i. e. opening in young inflorescences 

 considerably below the bud-bearing apex of the rhachis. 



++ Inflorescence very dense and spike-like : flowers white or nearly so. 



T. brachycarpum, Torr. i:rect, U to 2^ feet high, simple or branched, quite smooth or 

 somewhat hispid-i)ubescent below : stem becoming stout : leaves thickish ; thq basal oblong 

 or oblanceolate, sinuate-toothed or pinnatifid; the cauline as in the preceding: racemes 

 very dense and spike-like; fruiting pedicels 1 to \\ lines long: flowers small, white: sepals 

 linear nearly or quite equal at the base : petals narrow, much exserted : siliques slender, 

 terete' somewhat knotted, slcnder-stiped and sharply beaked, 8 to 10 lines in length, aseend- 

 in,r J-Bnt. Wilkes Exped. 2.31, t. 1 ; Gray, Proc. Am. Acad. vi. 520; Wats. Bot. King Exp. 

 25° 26- Brew. & Wats. Bot. Calif, i. 37. — Almndant in meadows and mountain valleys, 

 W. Nevada to Central and N. California ; fl. May to August. Said to have the odor and 

 taste of cabbage. 



++ ++ Inflorescence laxer : flowers roseate or purple. 



T Howellii Watsov. Erect or somewhat decumbent, slender, quite simple or with several 

 'slender simnlc ascending branches, hispid-pubescent near the base, glabrous above : radical 

 If. ■..•>. inimoroiis, rosulate, abont an inch in length, oblanceolate, obtusish, coarsely toothed, 



