WOOTON AND STANDLEY FLORA OF NEW MEXICO. 269 



KEY TO THE SPECIES. 



Cauline leaves lance-linear, narrowed at the base; sepals about 



4 mm. long 1. E. longirostris. 



Cauline leaves oblong to cordate, clasping; calyx 8 mm. long or 

 more. 



Basal leaves toothed, the cauline obtuse; sepals purplish 2. E. crassifoliu. 



Basal leaves pinnatifid, the cauline acute; sepals yellow 3. E. valida. 



1 Euklisia longirostris (S. Wats.) Rydb. Bull. Torrey Club 33: 142. 1906. 



Arabis longirostris S. Wats, in King, Geol. Expl. 40th Par. 5: 17. pi. 2. 1871. 



Streptanthits longirostris S. Wats. Proc. Amer. Acad. 25: 127. 1890. 



Type locality: "Growing in alkaline soil at the Steamboat Springs near Washoe 

 City, about Humboldt Lake, Nevada, and on Stansbury Island in Salt Lake." 



Range: Washington to Nevada and New Mexico. 



New Mexico: Aztec; Albuquerque. Upper Sonoran Zone. 



2. Euklisia crassifolia (Greene) Rydb. Bull. Torrey Club 33: 142. 1906. 

 Streptanthus crassifolius Greene, Pittonia 3: 227. 1897. 



Type locality: "Frequent in the mountain districts of eastern California south- 

 ward, and in adjacent Nevada and Arizona." 

 Range: California and Utah to New Mexico and Arizona. 

 New Mexico: Carrizo Mountains; Aztec. Dry hills, in the Upper Sonoran Zone. 



3. Euklisia valida (Greene) Woot. & Standi. Contr. U. S. Nat. Herb. 16: 125. 1913. 

 Disaccanthus validus Greene, Leaflets 1: 225. 1906. 



Disaccanthus mogollonicus Greene, loc. cit. 



Disaccanthus luteus Greene, loc. cit. 



Type locality: El Paso, Texas. 



Range: Western Texas and southern New Mexico. 



New Mexico: Mountains west of San Antonio; Silver City; Upper Corner Monu- 

 ment; Tres Hermanas; Tortugas Mountain; Bishops Cap; Kingston. Dry hills, in the 

 Lower Sonoran Zone. 



In the type of Disaccanthus luteus the flowers are of a deeper yellow than in the plant 

 of the Rio Grande region. Following his description of D. mogollonicus Doctor 

 Greene says: "All white-flowered material from New Mexico from Las CruceB to the 

 upper Gila belongs here." Asa matter of fact none of these plants have white flowers, 

 but both the calyx and corolla are a pale, clear yellow. The type of Disaccanthus 

 mogollonicus was collected in the Mogollon Mountains (Greene in 1881); that of 

 D. luteus came from Kingston {Metcalfe 1593). 



9. DITHYRAEA Haw. Spectacle-pod. 



Erect branching canescenl animals with entire or pinnatifid 1< ■axe-: flowers rath< t 

 large, white, 6 to 8 mm. long, in elongated terminal racemes; sUicles laterallj flattened, 

 each cell nearly orbicular, containing a single seed, indehiscenl bu1 separating at 

 maturity from the persisteul septum. 



KEY TO THE SPECIES. 



Pods stellate-pubescent, aol strongly veined; cauline Leaves with 



sinuate teeth, at leasl Dear the base L. /'■ 



Pods glabrous, conspicuously reticulate-veined; caulirn 



entire 2. />. grif 



1. Dithyraea wislizeni Engelm. in Wisliz. Mem. North. U 

 /:. Brewer & Wats. Bot. Calif. 1: 48. LJ 



Type locality: Sandy soil near Valverde and Fraj Cristobal, New Mexico. Type 



collected l>v Y\ islizenus in 1846. 



