62 ORUOIFER^^ CORONOPUS. 



LEPIDTOM. 



or only 4 or 2. Anthers short, somewhat didymous. Stigma 

 sessile, nearly or quite simple. Pods more or less distinctly did- 

 ymous, the valves thickish, often sculptured or tuberculate fall- 

 ing off as 1-seeded closed or nearly closed nutlets. Embryo fold- 

 ed above the base of the incumbent cotyledons. 



C. DiYYMUs Smith Fl. Britt. ii, 691. Annual or biennial! stems num- 

 erous and slender : leaves short an inch or less long pinnately parted with 

 7-9 lanceolate entire or sparingly toothed segments: flowers very small, 

 greenish white : petals minute or none : pods small, 1-1 J^ lines broad 

 notched at both ends, thus appearing transversely 2-lobed; valves turgid 

 and finely wrinkled. In moist soil and ditches, California to Vancouver Is- 

 land near the coast, and along the Atlantic seaboard. Introduced from 

 Europe, 



C. RcELLii All. Fed. n. 634. Annual or biennial : stems rather stout : 

 leaves an inch or more long pinnatifld with narrow lanceolate entire or 

 sparingly toothed segments : pods flattened 1)^-2 lines broad, not notched 

 above nor divided into 2 lobes, strongly roughened and somewhat crested 

 by radiating prominences. Roadsides and rubbish heaps, Poriland Ore- 

 gon, and the Atlantic States. Introduced from Europe. 



31 LEPIDIUM Tourn. Inst. 215, t. 109. L. Gen. n. 801. 

 Low herbs with small pinnatifld leaves and small white or yel- 

 low flowers in terminal racemes. Sepals short, ovate or elliptic- 

 oblong, obtuse, equal at base, more or less spreading. Petals en- 

 tirs, roundedat the apex : sometimes abortive or nmie. Stamens 

 free, unappeiidaged, all 6 present or by abortion only 4 or 2 pre- 

 sent, these representing the two larger pair. Style slender and 

 mbre or less elongated, or none. Pods orbicular or ovate, emargin- 

 ate or deeply notched at the apex, strongly compressed contrary 

 to the narrow partition. Valves acutely carinate; the cells 

 ] -seeded. Seeds not winged. Cotyledons incumbent or rarely 

 accumbent. 



§ 1 Style slender, sometimes rather short but distinctly de- 

 veloped and persistent. Cotyledons incumbent. 



L. montanum Nutt. T. & G. Fl. 1,116. Puberulentor nearly eal- 

 brous : stems several from a perennial, somewhat ligneous root, 8-15 inches 

 long, decumbent and spreading in a somewhat circular manner • radical 

 leaves more or less bipmnatifld with short-oblong acute segments • upper- 

 most leaves tnfld or hnear and entire : petals nearly twice ks lone as the 

 oval oblong sepals : style conspicuous : pods a line broad elliptical, slightly 

 emarginate, wingless or obscurely winged above, with short acutish teeth. 

 Flams and mountain valleys, Washington to California and the Rockv 

 Mountains. ^vui^jij. 



L. Integrifolia Nutt 1. c Glabrous or puberulent: stems several 

 from a single stout root, branching from the base: leaves oblong, oblan- 

 ceolate or spatulate, acute or apiculate, thickish, J-2 inches lone 2i^-3W: 

 lines broad, entire: racemes single and terminal, or more commonly sev- 

 eral, 1-2 inches long: pedicels spreading, 3-4 lines lone- Betak obnvatP 

 white, about twke the length of the broad membmrclouf sepals ildis^ 

 tmctly and broadly clawed, deciduous with the sepals: stamens 2- oansiile 

 ovate-oblong. l>^-2 lines long, barelj; retuse incLspicuously reiicXted 

 when quite ripe. Southeastern Washington to the Rocky Mountahis" 



L. CAMPBSTRE R. Br. in Ait. f. Kew ed 2 iv RS p,-,k^o„ 4. 2. 

 erect, simple and very leafy up to the rnflorescence!'a footer morl h^hl 



