66 BOTANY. 



the summit of the stem. There is great variation in the degree to which 

 the leaves are cut or toothed and in the hairiness of the entire plant. 

 Camp Grant, Ariz., at 4,753 feet altitude. (363.) 



Camelina sativa, Crantz. — Introduced in Colorado. 



" Tropidocarpum * gracile, Hook. — Stems weak, 2 feet high or less; 

 leaves pinnatifld or rarely 2-pinnatifid, with narrow, or linear segments; 

 flowers in the axils of the upper bract-like leaves; petals 1^-3" long, nearly 

 twice longer than the obtuse sepals ; pods 6-20" long, more than a line 

 broad, pointed at both ends, ascending or slender spreading pedicels 10-20" 

 long. San Francisco Mountains, Arizona." I have not a specimen acces- 

 sible, and therefore have been obliged to quote generic and specific descrip- 

 tion from Fl. Cal. 1, p. 44. 



Caulanthus crassicaulis, Watson.— Frequently called Wild Cabbage, 

 and used as a substitute for the better article. Nevada. 



Lepidium intermedium, Gray. — The usual apetalous Western form. 

 Boulder, Colo., Loew and Wolf. (597.) 



Lepidium alyssoides, Gray. (PI. Fendl. p. 10.) — Keasby, collector. 

 Peoria Creek, New Mexico. 



Lepidium montanum, Nutt. — Old Camp Goodwin, Ariz. (341.) 3,000 

 feet altitude. San Luis Valley, Colorado. (624.) 



Lepidium Fremontii, Watson? — Probably this species. Specimen too 

 young. Collected by Dr. Loew in Nevada. (King's Report, vol. v, plate iv.) 



Lepidium nanum, Watson. (King's Report, vol. v, plate iv.) — Halleck 

 Station, Nev. 



Thlaspi alpestre, L. (?) — I have no sufficient means of comparing 

 this with the European plant, but accept Mr. Watson's determination. 

 Exceedingly variable. Common in alpine and sub-alpine regions of Cen- 

 tral Colorado. (607.) 



BiscuTELLAf (Dithyr^ea) Wisuzeni, Engelm.— A foot or more high, 



* "Tropidocarpum, Hook. — Pod Huear, flattened laterally, often one celled by the disappearance 

 of the narrow partition ; valves carinate, 1-nerved. Seeds in two rows, minute, flattened, not winged ; 

 cotyledons incumbent. Style short. — A low, slender, hirsute, branching annual, with pinuately divided 

 leaves, and yellow solitary axillary flowers." 



t Biscotella, L. — Sepals nearly equal. Silique dehiscent, very flat, divided into lateral ovate 

 halves, each of which is surrounded by a cord-like margin. Each cell contains a single immarginateseed. 

 Herbs, usually erect, branching and hispid; leaves more or less pinnatifld; flowers bractless, yellow. 



