272 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
8. Lepidium alyssoides A. Gray, Mem. Amer. Acad. n. ser. 4: 18. 1849. 
TypE LocaLity: ‘Mountain valleys, from Santa Fe eastward to Rabbit’s Ear 
Creek,’’ New Mexico. Type collected by Fendler (no. 46). 
RancGE: Colorado to Texas and Arizona. 
New Mexico: Common nearly everywhere from the Pecos River westward across 
the State. Plains and hills, in the Lower and Upper Sonoran zones. 
Nearly related to the last, but as seen growing it is noticeably yellowish green, the 
flowers are not so bright a white, the leaves are narrower, and the basal ones are 
less divided. 
4, Lepidium apetalum Willd. Sp. Pl. 3: 439. 1800. 
Type Locauiry: ‘In Siberia.’’ 
Ranae: British Columbia and New England, southward throughout the United 
Statas; also in Asia; probably introduced in New Mexico. 
New Mexico: Aztec; Agricultural College; Santa Fe; Pajarito Park. 
5. Lepidium medium Greene, Erythea 3: 36. 1895. 
Lepidium intermedium A. Gray, Pl. Wright. 2: 15. 1853, not A. Rich. 1847. 
Type LocaLity: Ravines of the Organ Mountains, New Mexico. Type collected 
by Wright (no. 1320). 
RanGE: Missouri and Texas to California. 
New Mexico: Rio Pueblo; Sandia Mountains; Mangas Springs; Mimbres River; 
Florida Mountains; Mesilla Valley; Organ Mountains: Plains and hills, in the Lower 
and Upper Sonoran zones, rarely extending into the Transition. 
6. Lepidium hirsutum Rydb. Bull. Torrey Club 39: 322. 1913. 
Lepidium intermedium pubescens Greene, Bot. Gaz. 5: 157. 1881, not L. pubescens 
Desv. 1814. 
Lepidium medium pubescens Robinson in A, Gray, Syn. Fl. 1': 127, 1895. 
Tyre Locauity: Mangas Springs, New Mexico. Type collected by E. L. Greene, 
in 1880. 
Rance: Southwestern New Mexico and adjacent Arizona. 
New Mexico: Farmington; Chama; Winsors Ranch; Bear Mountain; Middle Fork 
of the Gila; Cliff; Pecos. Dry hillsides. 
7. Lepidium lasiocarpum Nutt.; Torr. & Gray, Fl. N. Amer, 1: 115. 1838. 
Lepidium wrighttt A. Gray, Pl. Wright. 2: 15. 1853. 
Tyre tocaritry: “Near St. Barbara, Upper California.”’ 
RANGE: Washington to California and Texas. 
New Mexico: Carrizo Mountains; Farmington; Upper Corner Monument; Mesilla 
Valley; Tortugas Mountain; Organ Mountains. Dry fields, in the Lower and Upper 
Sonoran zones. 
A low, spreading, more or less hirsute annual or winter annual, with stout divergent 
stems, pinnatifid leaves, and inconspicuous flowers followed quickly by the numerous 
somewhat crowded silicles. It is one of the few true ‘‘spring flowers” of the southern 
part of the State. Often it is a weed in irrigated land. 
14. THLASPI L. - PENNY CREss. 
Low annuals or perennials with a rosette of oblanceolate-spatulate leaves with few 
teeth; cauline leaves clasping; flowers white, purple-tinged, rather large for the fam- 
ily, 5 to 7 mm. long; siliques obovate to almost obcordate; style slender, remaining 
on the persistent septum. 
