212 



CRUCIFERJE. 



terete, sessile or short-stipitate. Seeds oblong, somewhat flattened, 

 not winged. Cotyledons incumbent. (Greek, thelus, female, and 

 pus, foot or support, the ovary more or less stipitate.) 



Cauline leaves mostly petioled; flowers 1%'to 2 lines long . .1. T. lasiophyttum. 

 Cauline leaves sessile or the lower frequently petioled; flowers 4 or 5 lines long. 

 Ovary glabrous; petals conspicuously exceeding the acuminate sepals .... 



2. T. Greenei. 



Ovary hairy; petals little exceeding the obtuse sepals . . . 3. T. flavescens. 



1. T. lasiophyllum Greene. Annual; erect, simple or branching 

 above, 1 to 3 ft. high, hispid with scattered hairs or nearly glabrous 

 above; lower leaves sinuately pinnatifid with mostly acute denticulate 

 or entire segments, 2 to 5 in. long, the upper lanceolate, less lobed or 

 merely toothed, all petioled, or the upper rarely sessile; flowers or 

 2 lines long, closely clustered, white or yellowish, on commonly 

 curved pedicels 1 line long; sepals oblong, scarcely more than half 

 the length of the narrow petals; pods ascending or strictly deflexed, 

 straight or somewhat curved, 2 to 4 in. .long, J line wide or less, 

 obtuse at apex. 



More frequent in the Coast Range region but also in the Sierras. 

 Apr. A variable species. Yar. rigidtjm Robinson. Often branch- 

 ing from the base; pods 1| in. long, § line broad, divaricately spread- 

 ing, sharply 'tipped with the short style, more or less torulose. — 

 Elmira to Antioch. Yar. inalienum Robinson. Pods to 1\ in. 

 long, 1 line broad, erect or slightly spreading. — Collinsville, Brandegee. 

 Scarcely differing from the preceding variety. 



2. T. Greenei. Glaucous and glabrous; erect, 3 to 4 ft. high, the 

 stem with several much elongated simple branches from below the 

 middle; leaves all sessile except the radical; lower cauline leaves 

 ovate or oblong-lanceolate, irregularly or somewhat erosely toothed or 

 laciniate, sometimes with two or three pairs of broad salient lobes 

 below the middle, 8 in. long or less; petiole about 1 in. long; upper- 

 most leaves linear-lanceolate, sharply serrate or denticulate, 1 to 4 in. 

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

 (even 2} ft. long); 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. — (T. flavescens Greene, 

 not Streptan thus flavescens Hook.) 



Brandegee's Collinsville specimens are illustrative of the natural 

 type here described which is not infrequent from Main Prairie to the 

 Montezuma Hills and Antioch; thence southward through the Mt. 

 Diablo range. It is our present opinion that T. procerum (also 

 referred to Streptanthus and Caulanthus) of authors is the same; if it 

 be distinct the contrasting characters have yet to be discovered. A 

 satisfactory arrangement in this group can only be had, however, 

 when complete material (now lacking to herbaria) has been gathered 

 by field-students. 



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



