FLOWERING PLANTS AND FERNS OF ARIZONA 1031 



(Toit. and Gray; Jepson, with broad, entire or subentire leaves about 2 

 cm. wide, and a more or less densely pilose and ciliate involucre. 

 The last variety is known in Arizona onlv by a collection without 

 definite locality (JE. Palmer in 1869). 



3. Agoseris aurantiaca (Hook.) Greene, Pittonia 2: 177. 1891. 



Troximon aurantiacum Hook., Fl. Bor. Amer. 1: 300. 1834. 

 Macrorhynch/us purpureas A. Grav, Amer. Acad. Arts and 



Sci. Mem. ser. 2, 4: 114. 1849. 

 Agoseris purpurea Greene, Pittonia 2: 177. 1891. 



Kaibab Plateau, San Francisco Peaks, and near Flagstaff (Coconino 

 County), 6.000 to 9,000 feet, grassy slopes, meadows, and open pine 

 forests, June to August. Alberta and British Columbia to New 

 Mexico and northern Arizona. 



4. Agoseris arizonica Greene, Pittonia 2: 176. 1891. 



Troximon arizonicum Greene, Pittonia 2: 78. 1890. 



Apache. Coconino, Yavapai, Graham (?), Gila, and Pima Counties, 

 5.500 to 11.000 feet, mostly in open pine forests, especially in the 

 Flagstaff region, April to August. Wyoming to New Mexico and 

 Arizona. 



Doubtfully distinct from the preceding, or at any rate difficult to 

 separate in herbarium specimens, which mostly lack ripe fruit and 

 almost never have the color of the flowers noted. 



142. PYRRHOPAPPUS. False-daxdeliox 



Xearly glabrous perennial, several-stemmed, the stems sparsely 

 leafy, somewhat branched; leaves entire to pinnatifid, mostly in a 

 basal rosette; heads few, long-peduncled, rather large, yellow; phyl- 

 laries narrowly lanceolate, corniculate below the tip, with a calyculus 

 of narrow bractlets less than half as long; achenes subfusiform, 

 about 5-sulcate, tapering into a slender beak longer than the bod}'; 

 pappus copious, of soft brown hairs, surrounded at base by a short 

 villous ring. 



1. Pyrrhopappus multicaulis DC, Prodr. 7: 144. 1838. 



Pyrrhopappus rotkrockii A. Gray, Amer. Acad. Arts and Sci. 



Proc. 11: 80. 1876. 

 Sitilias multicaulis Greene, Pittonia 2: 179. 1891. 



White Mountains (Navajo County), Huachuca Mountains (Cochise 

 County), Arivaca (Pima County), 3,500 to 7,200 feet, in moist some- 

 times saline soil, apparently rare, June to September, the type of 

 P. rotkrockii from Fisch's Ranch, southern Arizona (Rothrock 699). 

 Texas to Arizona and Mexico. 



143. CREPIS. 81 Hawksbeard 



Low perennial herbs, leafy-stemmed or scapose, glabrous to tomen- 

 tose; leaves mostly in a basal rosette, entire to pinnatifid ; heads several 

 or numerous, medium-sized, cymose or panicled, yellow; involucre of 

 narrow equal phyllaries and some calyculate bractlets; achenes 



^ Reference: Babcock, E. B., and Stebbin.-'. (i. I.., Jr. tiik American species <>k CREPIS. theik in- 

 terrelationships AND DISTRIBUTION AS AFFECTED BY POLYPLOIDY AND AIVMIXIS. Car- 



Lost. Wash. Pub. 504: 1-199. 1938. 



