MUSTARD FAMILY 35 



Eefs. — STREPTA2JTHUS SECUNDUS Greene, Fl. Fr. 261 (1891), type loc. n. base Mt Tamal- 

 pais; Man. Reg. S. F. Bay 17 (1894) ; Jepson, Fl. W. Mid. Cal. 215 (1901), ed. 2, 182 (1911) • 

 Man. 420, fig. 412 (1925), excl. Lake Co. plants. EucUsia secunda Greene, Lflts., 1:83 (1904)'. 



25. S. hispidus Gray. Annual; dwarfish, hispid throughout, branching, 2 to 

 6 inches high; leaf -blades obovate, coarsely toothed, not auriculate, all sessile ex- 

 cept the very lowest, 14 to I14 inches long, the basal crowded; raceme sub-secund; 

 sepals hispid with brownish hairs; petals purplish with white margins, 3 to 4 lines 

 long; pods erect or ascending, very hispid, l^/^ to 3 inches long, 1 line wide, the 

 pedicels 1/2 to 1 line long; style short and stigma broad; seeds elliptical, winged. 



Summits of the inner South Coast Range peaks, 3500 to 4800 feet : Mt. Diablo- 

 San Carlos Range. Mar.-May. 



Locs. — Mt. Diablo, Bolander 6267, Congdon, Lemmon, Jepson 2641, E. W. Hides 112 • San 

 Carlos Range, w. Fresno Co. (Syn. Fl. 1:472). 



Refs. — Streptanthus hispidus Gray, Proe. Am. Acad. 6:186 (1864), type loc. Mt. Diablo 

 Brewer; Jepson, Fl. W. Mid. Cal. 215 (1901), ed. 2, 183 (1911), Man. 420 (1925). EucUsia 

 hispida Greene, Lflts. 1:83 (1904). 



3. THELYPODIUM Endl. 



Ours mostly coarse erect annuals or biennials, rarely perennial. Basal leaves 

 mostly petioled, the cauline petioled or sessile-auriculate. Flowers white or pale 

 yellow, rarely purple or roseate, the racemes often dense. Petals with narrow 

 claw, the exserted limb narrow or obovate, plane or crisped. Stamens tetradynam- 

 ous, exserted; filaments distinct, in a few species often united; anthers narrowly 

 linear, curved. Stigma small, circular and entire or obscurely 2-lobed. Pod 

 terete, slender, short-stipitate or sessile. Seeds oblong, somewhat flattened, not 

 winged or scarcely so. Cotyledons incumbent. — Species about 15, North America. 

 (Greek thelus, female, and pus, foot or support, the ovary more or less stipitate.) 



Cauline leaves not sagittate- nor auriculate-clasping ; annuals or biennials. 



Flowers spreading in a dense spike-like raceme; fruiting racemes dense; herbage glabrous; 

 transmontane biennials. 



Blades of cauline leaves sessile, entire; racemes short, compact 1. T. integrifolium. 



Blades of cauline leaves petioled, irregularly laciniate or entire, the upper subentire; 



racemes much elongated 2. T. laeiniatum. 



Flowers in a raceme, the raceme soon lax ; fruiting racemes commonly lax ; annuals. 

 Flowers ascending; mostly Coast Ranges and coastal S. Cal. 



Blades of cauline leaves, at least the uppermost, sessile; flowers 4 to 5 lines long; 



pods ascending; herbage glabrous or nearly so S. T. fiavescens. 



Blades of cauline leaves petioled or mostly petioled; flowers 1% to 2^ lines long. 

 Calyx purple or purplish; pods ascending or deflexed; herbage glabrous or 



nearly so 4. T. lemmonii. 



Calyx green or yellowish; pods commonly reflexed or divaricate-spreading; 



herbage hispid in part „ 5. T. lasiophyllum. 



Flowers soon reflexed; pods with a beak 1 to 3 lines long; leaves all petioled; herbage 

 glabrous and glaucous; southern deserts 6. T. longirostris. 



Cauline leaves sagittate- or auriculate-clasping ; herbage glabrous and glaucous. 



Pods not torulose or scarcely so, ascending; annuals or no. 8 biennial; plants usually tall. 



Raceme very dense and spike-like; n. and e. of Sierra Nevada 7. T. brachycarpum. 



Raceme not dense or spike-like; leaves all entire. 



Petals spatulate, 2 times as long as the sepals; buds ovate; n. Cal 8. T. hoivellii. 



Petals linear-oblanceolate, 1^/4 to IV^ times as long as the sepals; buds linear; 



San Bernardino Mts 9. T. stenopetalum. 



Pods more or less markedly torulose. 



Perennial with heavy root-crown ; pods ascending ; plants low, the stem with few reduced 



leaves; Modoc Co 10. T. flexuosum. 



Annual; pods declined-spreading ; stem with elongated-serpentine branches; deserts 



11. T. cooperi. 



