352 - BRASSICACEAE 



J 



Petals bright yellow; stem-leaves entire-margined. 



46. D. surcuUfera, 

 Petals 3—1 nxm. long, pale yellow; stem-leaves entire-mar- 

 gmed. 47, D. aureiformis. 



Leaves thick, the basal ones oblanceolate, 1-2 cm. long, the 

 cauhne lanceolate or oblong. 48. D. aurea. 



Stem decumbent. 



Leaves finely stellate; pods twisted. 49. T>. decumhens. 



Leaves coarsely haii-y. with branched hairs; pods not twisted. 



50. £>, brachystylis. 



1, D. asprella Greene. Winter 



1 c vjreene. Winter annual, scapose or nearly so; scapes 1 to 



several, 5-10 cm. high, hirsute with branched hairs; leaves basal, rosulate, ob- 

 lanceolate, 2-3 cm. long, densely hairy; petals yellow, 4-5 mm. long; pod rather 

 turgid, 5 mm. long or more. Mountains: Ariz,-^ Utah. My. 



.^ 2. D. micrantha Nutt. Annual; stems 5-10 cm. high, branched at the 

 base more or less pubescent; leaves 5-15 mm. long, ovate or elliptic, entire, 

 stellate; petals shorter than the hairy sepals, or none, sometimes in the earlier 

 flowers 2.5-3 mm. long, 2-cleft at the apex; pedicels ascending; pod hispid, &-12 

 •mm. long, 4 mm. wide. D, caroliniana micrantha A. Grav. Dry plains: 111 — 

 Tex.— Anz.—Wash. Plain, Mr-Au. . ^ i^ 



high; lea-v 



hirsute; petals white, 3-3.5 mm. long, spatulate, emarsinate; p. 



lU-12 mm. long and nearly 2 mm. wide. Plains and hillsides, x...... 



to.U. Flam — Submont. Ap-My. 



4. D. cuneifolia Nutt. Annual; stem 6-20 cm. high, branched; leaves 

 obovate or cuneate, 1-4 cm. long, usually coarsely toothed above the middle, 

 stellate; racemes elongate in fruit; petals white, 3-4 mm. long; pod 7-15 mm. 

 —Ida "piai^ F~M^^ glabrate. Grassy places and plains: 111.— Fla.-Calif. 



5. D. nemorosa L, Winter annuals; stem leafy, 0.5-3 dm. high, branched 

 below; leaves often more or less dentate; petals light yellow, 2-3 mm. long; 

 fruiting pedicels divaricate, 1-2 cm. long; pods oblong, 5-10 mm. long, 2 mm. 

 wiae. Jluls, prairies, anrl riloi'no- a/t;„i, /-i_i- -nt__: r\ n r* . T^nffieui. 



Pluin — Mont. Ap-A_. 



1 '>^A ^' u^u^l^"^ ^- ^^*^- Winter annual ; stem branched or simple, leafy, 

 K r^ v^^- ' oasal leaves rosulate, entire or sparingly toothed, hirsute with 

 fo^!?. f v-'^'^^' ^*?°^rleaves lanceolate; racemes elongate; petals yeUow, 2-3 mm. 

 S' f'l^itmg pedicels 5-8 mm. long; pod erect, oblong, 6-10 mm. long, 2 mm. 

 wide. Mountains: (? N.M.)-Colo.-Utah. Submont.-MonL J^. 



Ur,J'\^'( P^*®*|ta Greene. Winter annual; stems usually several from the 

 ^fcr i;!r'i^^^i^l^^^^^^ lanceolate or oblanceolate, stellate, 1-3 cm. long, entire 

 W.„- f ^'- ^^^i?' ?^<^m-leaves ovate, small; petals white, spatulate, 2-3 mm. 

 wfl' ^™^t'ng pedicels 5^7 mm. long; pods oblong, about 1 cm. long, 2-3 mm. 



W^ ^u'^'"''^''J.'"'^T? ^- N«l«- ^- lapiluteaA. Ncls. Mountain slopes: 

 Wyo.— Alta.— B.C. Submont. Je-Jl. 



n;f^;rl®?n^'"®T®- ^'^"^^^ annual; stem stout, 7-10 cm. high, racemose 

 ost irom the base; leaves mostlv basal. nhlnno--l«nno,.lnff> *,nfirfi or snarmgly 



t<Zhprl h^iS -f ^' l«=^ve\'nostly basal, oblong-lanceolate, entire or sparingly 

 exceeSin. hi ^ ^^*^^*'?r*^? margins; petals white; pedicels spreading, much 

 exceedingthepod;podelliptic, 6-8mm. long. Dry places: Wyo. 



leaves o^atrin^^n^i*/^'"";- ^"""^^^ «t«™ ^^^^l^y "^^^h branched, stellate; 

 veUow or whhkhT^^*"' f^*''"' ^ *'°^- ^^"« ^^ ^^^^' t^ick, finely stonate; petaJs 

 lonl Drv hm ' - !?""•« ^?^'' I^d^««^« 3-4 mm. long; pod oblong, 2-5^1"^- 

 Mr-My.^ """"^ ^''^'^^'- Va.-Ga.-La.-Colo.; Ore.-Mont. Pto^«- 



dm ^h;v? ' K™\ ^^^'u f/"*^*" ^n*^"*^ of tiie habit of D. mmoralu; stems M 

 sSliate- '«t.m^S^i ^^^^} ^^^^e^?bovate or oblanceolate, densclv and coarsely 

 Sr 2-fZ; W.7^l^' ""^"^^^ '^^^'^ely toothed; petals yellow, or m age 

 Sd oblnnp- ?iii ^' f'i^ti^g.Pedicels 1^30 mm. long, ascending or spreading, 

 pod oblong, &-10 mm. long, 2 mm wide. D. nemorosa UiocarpaUndh. (?) D. 



