220 CRUCIFERiE. 



ciliate with forked hairs; cauline oblong, sessile, dentate or entire; 

 flowers large, fragrant, purple, J in. long; sepals often colored, broad, 

 2 to 3 lines long; pods erect or ascending, nearly straight, f to 1 in. 

 long, 1 line wide, abruptly beaked by a short stout style; valves 

 veined, 1-nerved; seeds in 1 row, round-elliptical, narrowly winged 

 or scarcely margined. 

 Eocky hilltops from San Francisco to Monterey. Mar.-Apr. 



5. A. Breweri Wats. Brewer Rock Cress. Stems many from 

 the much branched crown of a stout woody root, 2 to 6 in. high; 

 herbage stellately pubescent or canesoent, especially below; lower 

 leaves broadly spatulate, entire, 3 to 9 lines long; upper leaves lanceo- 

 late to oblong, sessile by a subcordate base or obtusely auriculate; 

 flowers bright red-purple or nearly white, 2 to 3 lines long, the 

 pedicels and purplish calyx more or less villous; pods spreading and 

 arcuate, IJ to 2J in. long, 1 line broad; valves 1-nerved, veined; 

 seeds orbicular, narrowly winged, somewhat in 2 rows. 



Rocky summits of mountain peaks from borders of Lake Co. south- 

 ward to Mt. Diablo, Mt. Hamilton and Loma Prieta. Apr. 



9. BARBAREA E.Br. 



Perennial herbs similar to the yellow-flowered Nasturtiums. Stem 

 angular. Leaves lyrate or pinnatifld. Stamens 6, distinctly tetra- 

 dynamous. Pods linear, somewhat quadrangular, abruptly termi- 

 nated by a pointed style, the valves strongly 1-nerved or carinate. 

 Seeds in 1 row in each cell, turgid, not margined. (Named after St. 

 Barbara. ) 



1. B. vulgaris R. Br. "Winter-cress. Glabrous, rather stout, 

 10 to 16 in. high; radical leaves elliptic, sometimes cordate at base, J 

 to 2 in. long, with or without small supplementary lobes borne along 

 the petiole; cauline similar, pinnatifld, with the terminal lobe largest 

 and often oblong-lanceolate; raceme terminal and solitary or with 

 several from the upper axils; petals narrowly obovate or oblanceolate, 

 the blade scarcely narrowed into a claw, about 3 lines long, twice as 

 long as the yellow sepals; pod 1^ in. long. 



Along streams in the mountains or among the hills: Coast Ranges 

 and Sierra Nevada. June-July. 



10. NASTURTIUM L. 



Nearly or quite glabrous annuals or perennials, sometimes growing 

 in water, mostly in wet places. Leaves toothed or pinnatifld or 

 pinnately divided. Flowers small, white or yellow. Sepals spread- 

 ing in antliesis. Petals scarcely clawed. Stigma capitate, nearly 

 sessile. Pod linear or oblong, terete or nearly so, valves mostly 

 1-nerved. Seeds minute, in 2 rows in each cell; cotyledons acoum- 

 bent. (Nasus, nose, and tortus, twisting, the nosti-ils affected by the 

 pungent herbage.) 



Flowers white; petals distinctly clawed, nearly twice the length of the 



sepals 1. N. officinale. 



Flowers yellow; petals scarcely clawed, little longer than the sepals. 



Pods linear, curved upward .2.N. curvisiliqua. 



Pods ohlong, turgid, straight . . . . . . 3. iV. palustris. 



