694 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
48. GNAPHALIUM L. Cupweep. 
Floccose-woolly herbs with narrow sessile entire leaves and cymose or glomerate 
heads of yellowish or whitish flowers; heads heterogamous, discoid; involucre of 
numerous thin scarious bracts imbricated in several series; pappus of numerous 
scabrous bristles in a single series; achenes terete or compressed, mostly nerveless. 
KEY TO THE SPECIES. 
Heads leafy-bracted; plants low, usually less than 20 cm. 
Plants loosely floccose; leaves mostly oblong or oblanceolate. 1. G. palustre. 
Plants appressed-tomentose; leaves linear to linear-oblan- 
ceolate. 
Stems erect, simple or with few erect branches........ 2. G. strictum. 
Stems abundantly divaricate-branched from the base... 3. G. angustifolium. 
Heads not leafy-bracted; plants mostly 30 cm. high or more. 
Leaves green and glandular-viscid on the upper surface.... 4. G. decurrens. 
Leaves tomentose on both surfaces, not apparently viscid. 
Leaves narrowed at the base, not decurrent; stems 
slender, weak; heads numerous, loosely corym- 
bose... 22.2... e eee eee eee eee eee 5. G. wrightit. 
Leaves not narrowed at the base, decurrent; stems 
stout, erect; heads densely clustered at the ends 
of the branches. 
Bracts densely arachnoid at the base, nearly white; 
pubescence of the stems and leaves white; 
stems densely leafy throughout............ 6. G. chalense. 
Bracts nearly glabrous, yellowish; pubescence of 
stems and leaves yellowish; stems with only 
a few distant reduced leaves above......... 7. G. sulphurescens. 
1. Gnaphalium palustre Nutt. Trans. Amer. Phil. Soc. n. ser. 7: 403. 1841. 
Type Locauiry: “Rocky Mountains, Oregon, California and Chili.”’ 
RanGeE: British Columbia and Montana to California and northwestern New 
Mexico. 
New Mexico: Cedar Hill (Standley 7930). Wet ground. 
2. Gnaphalium strictum A. Gray, U. 8. Rep. Expl. Miss. Pacif. 4: 110. 1856. 
Tyre Locauity: Banks of the Rio Grande, near Albuquerque, New Mexico. Type 
collected by Bigelow. 
Rance: Colorado and Wyoming to Arizona and New Mexico. 
New Mexico: Albuquerque; Tunitcha Mountains; West Fork of the Gila; Santa 
Fe Creek. Wet soil, in the Upper Sonoran and Transition zones. 
3. Gnaphalium angustifolium A. Nels. Bull. Torrey Club 26: 357. 1899. 
Type Locauity: Head of Woods Creek, Medicine Bow Mountains, Wyoming. 
RanGe: Wyoming to northern New Mexico. 
New Mexico: Chama; Ensenada. Wet soil, in the Transition Zone. 
4. Gnaphalium decurrens Ives, Amer. Journ. Sci. 1: 380. pl. 7. 1819. 
Type LocALity: Near New Haven, Connecticut. 
RanaE: Idaho and Nova Scotia to New Mexico and Pennsylvania. 
New Mexico: Santa Fe and Las Vegas mountains; Santa Rita; Black Range; Fort 
Tularosa; Capitan Mountains; White Mountains; Organ Mountains. Meadows, in the 
Transition Zone. 
