272 CRUCIFER^. 



(1753), under Erysimum. Rigid, erect, sparingly and divaricately branch- 

 ing above, somewhat hirsute: lowest leaves depressed and rosulate, 

 lyrately and somewhat runcinately piunatifid, 3—^6 in. long: pods terete, 

 Vg in. long, tapering from base to summit, nearly sessile, closely appressed 

 to the rachis in a long slender raceme. — Abundant by waysides and in 

 waste grounds; native of Europe; commonly called Hedge Mustard. 



5. S. ACUTANGULUM, DC. F\. Fr. iv. 670 (1804). Hirsute with scattered 

 simple hairs, 1 — 2 ft. high, with ascending branches: leaves 2—6 in. long, 

 mucinate-pinnatifid: pods terete, 1 1^ in. long, less than a line wide, 

 erect or ascending on very short pedicels. — Also from Europe, but not 

 as common as the last. 



20. SUBULARIA, Linnxus (Awlwoet). Aqiiatic, dwarf, acaulescent, 

 with tufted subulate. leaves, and a simple scape, bearing a few minute 

 white flowers. Sepals equal at base (in one foreign species the sepals are 

 united at base, and the stamens perigynous), spreading. Petals without 

 distinct claws. Filaments without wings or appendages. Pods ovoid, 

 slightly obcompressed; style 0. Seeds few, wingless; cotyledons in- 

 cumbent. 



1. S. aquatica, Linn. Sp. PI. ii. 642 (1753). Scapes 1—3 in. high: 

 leaves not so long: fl. scattered, less than a line long; petals not exserted; 

 pods 13^ lines long, about equalling the pedicels, obtuse. — In stagnant 

 pools, on the upper Tuolumne, Bolander; plant usually submersed 

 altogether, and therefore easily overlooked. It ought not to be either 

 local or rare in the higher mountains. 



21. THLASPI, Dillenius. Low glabrous herbs with simple stems. 

 Lower leaves rosulate, entire or toothed; cauline oblong, auricled and 

 clasping. Flowers rather small, white or pinkish. Pods cuneate-oblong 

 or -obcordate, obcompressed but not strongly so; valves acutely carinate 

 or winged; style rather long. Seeds somewhat turgid, wingless; coty- 

 ledons accumbent. 



1. T. alpestre, Linn. Sp. PI. 2 ed. ii. 903 (1763). Stems several, from 

 a perennial branching rootstock, J^— 1 ft. high or more: radical leaves 

 1 in. long, including the slender petiole, obovate to oblanceolate, entire 

 or few-toothed; cauline obovate to oblong, entire, obtuse or acutish: fl. 

 white, 2—3 lines long: pods obovate to cuneate-oblong, 3—4 lines long, 

 emarginate or truncate at the summit, tipped by a style 1 line long, 

 spreading horizontally on the short pedicels.— Woods of Humboldt Co., 

 Marshall, and northward. 



2. T. Californicuiii, Wats. Proc. Am. Acad. xvii. 365 (1882). Biennial, 

 6 8 in. high : lower leaves oblanceolate, attenuate to a slender petiole, 



. few-toothed; cauline oblong-lanceolate, narrower toward the base, and 

 usually narrowly auriculate: fl. 2 lines long: pods oblanceolate, acute, 

 4—5 lines long.— At Kneeland Prairie, Humboldt Co., Rattan. 



