MUSTARD FAMILY. 181 



straight or somewhat curved, 2 to 4 in. long, % line wide or less, obtuse at 

 apex. 



Coast Eanges; Sierra Nevada. Apr. A variable species. 



2. T. greenei Jepson. Erect, 2 to 3 or even 4 ft. high, the stem with 

 several much elongated simple branches from below the middle; herbage glau- 

 cous and glabrous; radical and lower leaves ovate or oblong-lanceolate, irreg- 

 ular or somewhat erosely toothed or laciniate, sometimes with two or three pairs 

 of broad salient lobes below the middle, 8 in. long or less; petioles about 1 in. 

 long; upper leaves linear-lanceolate, sharply serrate or denticulate, 1 to 4 in. 

 long, sessile; racemes in flower rather dense, in fruit much elongated; flowers 

 4 to 5 lines long, pale yellow; sepals narrowly oblong, tapering to an acuminate 

 apex, which often bears a few hairs; petals much exceeding the sepals, the 

 claw broad and the undulate blade narrow; ovary glabrous; pods 2 to 3 in. 

 long, rather less than 1 line wide, beaked by the style. 



Main Prairie and Collinsville southward to the Mt. Diablo range. 



3. T. flavescens (Hook.) Jepson. One ft. high, perhaps more; stems, 

 petioles, midribs and margins of leaves hispidulous; leaves coarsely and un- 

 equally toothed, the lower petioled and sometimes pinnatifid, the uppermost 

 sharply denticulate or entire; flowers yellowish, 4 lines long; sepals oblong, 

 broadest toward the acute apex, which usually bears a few hairs; petals undu- 

 late the claw as broad or broader than the blade, little exceeding the sepals; 

 ovary hairy; fruit unknown to us. — (T. hookeri Greene.) 



Livermore to Monterey. Mar. 



2. STREPTANTHUS Nutt. 



Annuals or a few biennials, often glaucous. Eadical leaves commonly 

 toothed or pinnatifid, the cauline similar or entire, often sagittate-clasping. 

 Sepals usually of the same color as the petals, two or all saccate at base, the 

 calyx thus ovoid or broad at base and contracted above, or by the spreading 

 of the tips becoming somewhat flask-shaped, rarely subcylindric. Petals purple 

 or white, with a narrow undulate or crisped limb and channeled claw, regular, 

 or somewhat irregular as in no. 6. Stamens tetradynamous, or in 3 unequal 

 pairs, the 2 longer pairs with filaments connate below or the uppermost pair 

 with entirely united filaments. Pod narrowly linear, flattened parallel to the 

 partition, sometimes subterete; valves 1-nerved or rarely carinate. Seeds flat, 

 margined or winged. Cotyledons accumbent. (Greek streptas, twisted, and 

 anthos, flower, in reference to the petals.) 



Upper leaves oval or orbicular and cordate-clasping. 



Filaments all distinct or one pair connate; biennial, the flowering stems from an 



indurated stock 1. S. suffrutescens. 



Filaments distinct; annual 2. .S. orbiculatus. 



Upper leaves mostly narrow; filaments of longer stamens connate in pairs; annuals. 

 Herbage glabrous; 2 pairs of filaments connate. 



Some lower leaves broadly ovate; flowers very short-pediceled; petals purple and 



white 3. S. breweri. 



Cauline leaves all linear; petals white. 



Flowers subsessile; sepals with whitish tips 4. S. barbiger. 



Flowers long-pediceled; sepals dark purple or black 5. 5. niger. 



Herbage hispid-pubescent or hirsute; upper pair of filaments connate. 

 Leaves mostly narrow. 



Flowers purple; raceme not 1-sided 6. S. glandulosus. 



Flowers pale ; raceme 1-sided 7. S. secundus. 



Some leaves obovate; petals purplish with white tips 8. S. hispidus. 



1. S. suffrutescens Greene. Biennial (sometimes annual?), herbage gla- 

 biuus; branches 6 to 15 in. long from a stout indurated main stem 6 to 9 in. 



