124 Nelson: New Plants erom Wyoming 



oblong below, lanceolate above, 2-4 cni. long : raceme from simple 

 to paniculatcly branched, nearly or quite naked, glabrous or 

 slightly pubescent on the pedicels : sepals oblong, obtuse, vein- 

 less, scarious margined, about 4 mm, long : petals white to pinkish, 

 spatulate, twice as long as the sepals : pods from widely divaricate- 

 to pendulous, 3-4 cm. long, nearly 2 mm. wide ; valves i -nerved : 

 seeds almost as broad as the valves, very narrowly winged, orbic- 

 ular, at maturity in one irregular row. 



The woody perennial base allies it to A. suffrutcsccns Gray, 

 but its leaf, floral and fruit characters are quite different. It may 

 be considered somewhat doubtfully a member of the section Tur- 

 ritis. It occurs rather scatteringly in the draws among the Green 

 River Cliffs where it seeks the protection of the sage-brush. Type 

 specimen no. 471 1, Green River, June 4, 1898. 



F 



Lesquerella prostrata 



Perennial : pubescence stellate throughout, dense, appressed r 

 taproot woody, vertical, crown simple or branched : stems several, 

 5-20 from each crown, usually slender and flcxuous-sprcading, 

 10-15 cm. long (including the raceme) sometimes shorter and 

 ascending : leaves crowded on the crowns, rhomboidal, oval or 

 oblong, 3-15 mm, long, on petioles 2-4 times as long: cauline 

 leaves few, oblanceolate to linear : raceme in fruit half the length of 

 the stem: pedicels ascending or somewhat recurved, 5-10 mm, 

 long : flowers somewhat congested, medium size : sepals ovate, 

 delicately veined, somewhat unequal, the alternate ones with a 

 scarious inflexed margin, about 5 mm. long : petals obovate or 

 broadly spatulate, a little less than twice the length of the sepals : 

 pods broadly ovate, not compressed ; septum elliptic, mostly per- 

 forate : the valves slightly gibbous at base : style hardly equaling 

 the length of the pod : ovules few, seeds only i or 2 in each cclL 



The affinities of this plant seem to be with L. spathulata Ryd- 

 berg, though of this I have not seen a specimen. It was secured 

 on stony, gravelly slopes of Unita Co.; not plentiful. Type speci- 

 men in Herb. University of Wyoming, no. 4564, Piedmont, June 

 7, 1898. 



Lepidium ramosissimum 



Biennial, 2-4 dm. high, obscurely prulnose-pubescent, pro- 

 fusely branched, the branches either divaricate and crowded the 

 whole length of an excurrent stem or diffusely spreading from the 

 base, the branches also divaricately ramose : taproot stout, 

 mostly perpendicular, only moderately long, producing but few,. 



