178 CRUCIFERAE. 



mm. long; cauline oblong; raceme dense; flowers yellow; calyx glabrous; pods 

 oblong, obtuse, pubescent, 8-10 mm. long. 



In loose rocky soil, on Mount Rainier at 3000 m. altitude, an elevation 

 reached by only one other plant, namely Smelowskia ovalis. Known also 

 from the Three Sisters, Oregon, and from Lassen's Peak, California. 



Draba verna L. Annual; stems several, leafless, 5-10 cm. high, simple, 

 nearly glabrous; leaves in a rosette, oblong or oval, toothed or entire, obtuse, 

 4-8 mm. long, pubescent with branched hairs; flowers white, in a loose raceme; 

 petals deeply 2-cleft; pods oblong, glabrous, 4-8 mm. long, shorter than the 

 spreading pedicels. 



In sandy soil. A very variable species composed of many forms which on 

 account of close-pollination breed true. 



Draba brachycarpa Nutt. Annual, the herbage pubescent; stems simple 

 or branched, 5-20 cm. high, leafy to the inflorescence; leaves ovate to oblong, 

 entire or nearly so, 4-8 mm. long; pods oblong, acutish, glabrous, 4 mm. long, 

 about equalling the pedicels, crowded in a strict raceme. 



Coburg, Oregon, Howell. 



Draba nemorosa L. Annual, the simple stems 5-40 cm. high, leafy and 

 pubescent below; leaves sessile, oblong or ovate, usually dentate, acutish, 

 1-2 cm. long, stellate-pubescent; raceme loose, 3-many-flowered; flowers 

 small, 4 mm. broad; petals yellow becoming whitish, notched, a little longer 

 than the villous sepals; pod oblong, acute, appressed-pubescent or glabrous, 

 about 1 cm. long, much shorter than the spreading pedicels. 



In sandy soil. Pods usually pubescent. The form with glabrous pods is 

 D. nemorosa leiocarpa Lindbl. (D. lutea Gilib.) 



Draba stenoloba Ledeb. Annual, the slender stems 10-40 cm. high, the 

 leaves mostly in a basal rosette; leaves obovate to oblanceolate, mostly acute, 

 more or less pubescent; sepals glabrous or with a few hairs; pods linear, glab- 

 rous, 10-15 mm. long, equalling or longer than the pedicels. 



Warm exposures, in the mountains. 



233. SUBULARIA. AWLWORT. 



Small stemless aquatic glabrous perennials with tufted awl- 

 shaped leaves; flowers few, minute, white, on a naked scape 

 2-8 cm. high; style none; pod ovoid or spherical with a broad 

 partition; valves turgid, 1-nerved; seeds several. 



Subularia aquatica L. Submersed in shallow water or on muddy shores; 

 leaves 12-20, unequal, erect, 3-6 cm. long. 



Sproat Lake, Vancouver Island, British Columbia, Macoun; Whatcom 

 Lake, Whatcom County, Washington, Suksdorf. Infrequent, but usually 

 abundant where found, sometimes forming extensive colonies like a greensward. 



234. COCHLEARIA. 



Maritime fleshy glabrous herbs with lobed or entire alternate 

 leaves; flowers small, white; sepals short and broad, rounded 

 at the apex; petals obovate, cuneate; style slender; stigma 

 simple or nearly so; pod a very turgid globose silicle; seeds 

 2-several, in 2 rows. 



Cochlearia officinalis L. Succulent herb with decumbent branched stems 

 about 30 cm. long; basal leaves petioled, broadly ovate to orbicular, subcordate, 



