CATALOGUE. 29 



City, Nevada. Frequent in sirb-alkaline soils under sage-brush in Carson and 

 Humboldt Valleys, Nevada, and Salt Lake Valley, Utah. April- June, (118.) 



Lepidium inteemedium, Grray. Western specimens of this species are 

 most usually apetalous, and either glabrous or pubescent. Dr. Hooker appears 

 to consider it the same with L. ruderale, L., Tibetian specimens of which, 

 in Herb. Gray., are identical in shape and size of the pod with some of the 

 Western American ones. The petaled form is reported from the Indian 

 Territory, Western Texas, New Mexico, and Utah. The apetalous form 

 has a wider range, from Hudson's Bay and the Arctic Circle to the Pacific, 

 south to Illinois, and much more rarely along the central ranges into New 

 Mexico. Found frequently in the valleys and on the foot-hills of Nevada and 

 of Salt Lake Valley ; 4,500-6,500 feet altitude ; May-July. (119.) 



Lepidium alyssoides, Gray. PL, Fendl., p. 10. Glabrous ; stems diffuse 

 from a perennial root ; leaves narrowly hnear, acute, narrowed at base, entire, 

 sometimes pinnately 3-5-lobed ; racemes densely corymbed ; petals round- 

 spatulate, thrice longer than the calyx ; stamens 6 ; pods ovate, wingless, 

 scarcely emarginate, glabrous; style very short. — 6-12' high; flowers conspi- 

 cuous ; siliques 1" in length, with a minute emargination ; secondary leaves 

 sometimes bi-pinnatifid. Western Texas to Arizona. Foot-hills of the 

 Trinity Mountains near Humboldt Sink, and of the West Humboldt Moun- 

 tains, Nevada ; in flower ; May, June. (120.) 



Lepidium montanum, Nutt. Biennial, erect or decumbent, diffusely 

 branched ; leaves pinnatifid, segments more or less dissected, especially upon 

 the upper margin ; uppermost leaves with fewer segments, trifid or entire ; 

 flowers in dense corymbed racemes ; petals round-spatulate, twice longer than 

 the sepals ; pods orbicular, slightly emarginate, wingless, or somewhat winged 

 and ovate. — Glabrous, or hoary with a short grayish pubescence; variable 

 also in the section of the leaves and in habit of growth ; fruiting racemes 

 rather short. Southern California and Sonora to the Columbia River. Fre- 

 quent in the valleys of Nevada and Utah, growing in damp sub-alkahne soils ; 

 4,500-6,000 feet altitude ; May-September. (121.) 



Var. ALPiNUM. With decidedly perennial root-stock ; glabrous ; leaf- 

 segments somewhat broader, and style longer. Chiefly remarkable for its 

 habitat — a damp rocky gorge of Cottonwood Canon in the Wahsatch, at an 

 elevation of 9,000 feet; July, August. (122.) 



Lepidium ? Leafless specimens, long past maturity ; 2° high, erect, 



