Thelypodium. CRUCIFER^. 177 



T. Wrightii, Gray. Slender-stemmed aud paniculately branched : leaves rather narrow, 

 lanceolate to linear, toothed or piuuatifid ; segments mostly entire ; the uppermost leaves 

 often entire : racemes 2 to 5 inches long; pedicels filiform, divaricate, in fruit 3 to 5 lines in 

 length: flowers somewliat larger than in the preceding: petals about 3 lines in length: 

 capsules very slender, 1:^ to nearly 3 inches in length. — PI. Wright, i. 7, & ii. 12 ; Torr. & 

 Gray, Pacif. R. Rep. ii. 126 ; Porter & Coulter, Fl. Col. 9; Coulter, Man. Rocky Mt. Reg. 

 21. — Colorado to New Mexico, Arizona, and S. Utah; growing in mountainous regions 

 at moderate altitudes. (Mex., Pringle; Lower Calif., Orcutt.) 



T. laciniatum, Endl. Glabrous biennial, usually stouter than the preceding and less 

 branched : leaves broader, somewhat fleshy, ovate or ovate-lanceolate, more irregularly cut ; 

 segments usually again toothed or lobed ; the uppermost leaves often subentire ; petioles 

 rather long : racemes especially the terminal one sometimes a foot or more in length ; 

 pedicels short, even in fruit seldom exceeding 2 to 3 lines in length, rather rigid, divaricate : 

 pods slender, widely and irregularly spreading, I i to 3 inches long. — Endl. 1. c. T. ne- 

 (jlectum, Jones, Am. Nat. 1883, 875, as to pi. descr. and type in part. Macropodium laciniatum, 

 Hook. Fl. Bor.-Am. i. 43. Pachijpodium laciniatum, Nutt. 1. c. 96. — Mountain valleys, etc., 

 Nevada and N. California to Washington ; fl. May aud June. 



-I— H— Inflorescence simple, elongated, or branched ; branches usually long and more loosely 

 flowered than in the preceding division : pods erect or spreading, sometimes rigid. 



T. flavescens, Watson. Glabrous or more or less pilose : stem terete, erect, 2 feet or 

 more in height, branched above : cauliue leaves oblong-lanceolate, shallowly dentate or 

 denticulate : pedicels about 3 lines in length, scattered, ascending : flowers nearly white : 

 sepals linear-oblong, acute, 3 lines long, considerably exceeded by the narrow linear crisped 

 petals : siliques 2-^- inches long, rigid, taper-pointed, at first pilose, later quite glabrous. — Bot. 

 King Exp. 25. Streptanthus flavescens, Torr. Pacif. R. IJep. iv. 65, not of Hook. — Central 

 California, Benicia, Bigelow, Antioch, K. Brandegee. 



T. lasioph^Uum, Greene. Erect annual, hispid below, often smoothish above : leaves 

 ohlauceolate or oblong in outline, irregularly sinuate-toothed or pinnatifid with spreading 

 acute or obtuse entire or toothed segments, 1^ to 6 inches long, distinctly petioled or the 

 upper sessile by a narrow base : flowers rather small, closely clustered, roseate or yellowish 

 white : sepals oblong, scarcely more than half the length of the narrow spatulate oblong 

 petals : fruiting pedicels very short, f to H lines long, rather firm, curved : pods commonly 

 deflexed, slender and somewhat curved, attenuate at the apex ; stigma quite simple. — Bull. 

 Torr. Club, xiii. 142. Sisi/mbrinm reflexum, Nutt. Proc. Acad. Philad. iii. 26, & Jour. i. 183. 

 ■? S. pijgnueum, Nutt. in Torr. & Gray, Fl. i. 91, 667. S. deflexum, Harv. in Torr. Pacif. R. 

 Rep. iv. 66. S. lasiophi/tlum, K. Brandegee, Zoe, ii. 339. Turrit is (?) lasiophyllu, Hook. & 

 Arn. Bot. Beech. 321. Erysimum retrofructum, Torr. Bot. Wilkes Exped. 230. — Sandy and 

 rocky soil, Utah, Palmer, Jones, and Arizona, Palmer, to California aud Washington, 

 Suksdorf. A common and variable species, with the attenuate pods, simple stigma, and 

 often purplish flowers of this genus, but included by many and with almost equal propriety 

 in Sisi/mbrium. 



Var. rigidum, Robinson, n. var. Foliage and flowers as in type : pods deflexed but 

 widely spreading, curved outwards, very rigid and pungent. — T. rigidum, Greene, Pittonia, 

 i. 62. — Collected by Jones "on the Mexican boundary," 1882; by Maij at Elmira, Calif., 

 1883 ; and by Greene near Antioch, Calif. 



Var. inalienum, Robinson, n. var. Whole habit as well as floral characters of the 

 type : pods erect or sliglitly spreading, less rigid and pungent than in the last. — Sisj/mbriitm 

 acutangulum. Brew. & Wats. Bot. Calif, i. 41, not DC. — Central California near the coast; 

 " back of Sta. Barbara and Los Angeles," Brewer, nos. 194, 417 ;' Oakland, Holder, no. 2524 ; 

 San Francisco, Kellogg & Harford, no. 55. The European Sisjimhritim antlangidum, DC, of 

 similar habit, has shorter inflorescences, less numerous pods of less rigid texture, somewhat 

 larger flowers and stigmas almost always slightly 2-lobcd, with lobes lying over the pla- 

 centae as usual in Sisijmhrium. 



T. Hookeri, Greene. Annual with habit of the preceding species : leaves hispid-pubescent 

 upon the midrib beneath : pedicels more widely spreading, 2 to 3 lines in length : flowers 

 somewhat smaller: sepals narrowly oblong, IJ to 2 lines in length, widely spreading, not 

 greatly exceeded by the narrow although flat petals : fruiting pedicels short, curved 



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