WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 691 
42. APHANOSTEPHUS DC. 
Slender low annuals or perennials, much branched, with entire to pinnatifid leaves 
and pedunculate white-rayed heads; bracts broadly lanceolate, well imbricated; 
receptacle conic or hemispheric; achenes terete truncate, striate, with low, laciniate 
or ciliate pappus. 
KEY TO THE SPECIES. 
Perennial; leaves linear........- ---.-.-.-. L.A. perennis. 
Annuals or biennials; leaves oblanceolate, “oblong. lanceolate, 
or spatulate, often lobed or toothed. 
Corolla much thickened at the base in age; pappus con- 
spicuously dentate or laciniate...............-....... 2. A. skirrobasis. 
Corolla not thickened at the base; pappus merely a cline. 
fringed edge.........--------------2---- eee eee eee 3. A, ramosissimus. 
1. Aphanostephus perennis Woot. & Standl. Contr. U.S. Nat. Herb. 16: 189.1913. 
TypPE Locauity: Knowles, New Mexico. Type collected by Wooton, July 29, 1909, 
Ran@e: Known only from type locality, in the Upper Sonoran Zone. 
2. Aphanostephus skirrobasis (DC.) Trel. Rep. Ark. Geol. Surv. 4: 191. 1891. 
Keerlia skirrobasis DC. Prodr. 5: 310. 1836. 
Egletes arkansana Nutt. Trans, Amer, Phil. Soc. n. ser. 7: 394. 1841. 
Aphanostephus arkansanus A. Gray, Pl. Wright. 1: 93. 1852. 
Type Locauiry: ‘‘In Mexico inter Bejar et flum. Trinitas.”” This is now Texas 
rather than Mexico. 
Rance: Kansas and Arkansas to New Mexico and Mexico. 
New Mexico: Arroyo Ranch (Griffiths 5677, 5736). Plains and low hills, in the 
Upper Sonoran Zone. 
8. Aphanostephus ramosissimus DC. Prodr. 5: 310. 1836. 
Egletes ramosissima A, Gray, Mem. Amer. Acad. n. ser. 4: 71, 1849. 
Type Locatiry: ‘“‘In Mexico circa Bejar et Laredo.’? This is now Texas, 
Ranee: Western Texas to southern Arizona, south into Mexico. 
New Mexico: North of Santa Fe; McCarthys Ranch; Mesilla Valley; Florida 
Mountains; Dog Spring; mountains w est of San Antonio; Rincon; Artesia; Roswell. 
Dry hills and mesas, in the Lower and Upper Sonoran zones. 
43. TOWNSENDIA Hook. 
Annual, biennial, or perennial herbs, often cespitose, caulescent or acaulescent; 
heads large, with purple or white rays; involucre hemispheric, of numerous large, 
imbricated, scarious-margined, often purplish bracts; pappus of numerous barbellate 
bristles, that of the ray flowers shorter or reduced to very short bristles or scales. 
KEY TO THE SPECIES. 
Plants apparently acaulescent.......-.......--------------------- 1. T. exscapa. 
Plants with evident stems. 
Bracts not acuminate; rays whitish. 
Pappus of ray achenes equaling that of the disk achenes; 
heads 10 to 15 mm. hign...........-------- 2-2 eee 2. T. arizonica. 
Pappus of ray achenes much shorter than that of the disk 
flowers; heads less than 10 mm. high. 
Perennial, with very short stems; heads usually equal- 
ed by the leaves..............2..- eee eee e eee 3. T. incana. 
Annual or biennial with long stems; heads much sur- 
passing the leaves....................2220008- 4. T. fendleri. 
