CONTRIBUTION'S 



WESTERN BOTANY, 



No. 12. 



NEW SPECIES AND NOTES. 



Arabis Cobrensis n. sp. 



Cobre, Nevada, on clay hills, June 16th, 1906, in the lower 

 Temperate Life Zone. ^ 



Stems caespitose from a woody root ; leaves 2-3 inches 

 long-, 1-2 hnes wide, barely acute, entire, tapering to a short 

 petiole, fascicled, densely stellate-pubescent; stem leaves the 

 same but linear and with slightly enlarged and auriculate base, 

 R-radually passing into subulate-linear bracts, edges inclined to 

 be revolute ; inflorescence open, ample, of panicled racemes, 

 ■•-2 feet long, nearly smooth: fruiting pedicels 9-12 lines 

 long, arcuate, reflexed, in flower 2-3 lines long and ascending; 

 flowers light-purple, 2'^ lines long; petals oblanceolate and 

 rounded, half longer than the white-margined, oblong, obtuse 

 sepals : stigmas capitate, sessile ; pods 1 line wide and about 

 ?. inches long, nearly straight, flat, smooth, barely acute at 



r^uMle: f)o''s about an inch apart; flowers few and clustered af 

 the ends of the branches. 



Aribis Whitedi riper is almost certainly a Draba 



Thelvccdium deseiti n. sp. 



.\m:;rgo.-a Desert. April 27, 1907. at 4,000 feel alt., in loose 



