1030 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



The bright pink heads are large for the size of the plant. It is 

 reported that the Hopi Indians boil the leaves with meat and with 

 mush, and regard the plant as stimulative of milk flow in women. 



3. Lygodesmia exigua A. Gray, Amer. Acad. Arts and Sci. Proc. 9: 

 217. 1874. 



Prenanthes exigua A. Gray, PL Wright. 2: 105. 1853. 

 Stephanomeria minima M. E. Jones., Contrib. West. Bot. 17: 

 31. 1930. 



Navajo, Coconino, Mohave, Pima, and Yuma Counties (probably 

 elsewhere), 1,000 to 5,500 feet, hills and mesas, March to June, the 

 type of Stephanomeria minima from Fredonia, Coconino County 

 (M. E. Jones in 1929). Colorado to Texas, Arizona, and California. 



141. AGOSERIS. Mountain-dandelion 



Perennial or rarely annual, scapose herbs; leaves narrow, entire to 

 pinnatifid; heads solitary, medium -sized, on long naked scapes; 

 involucre usually graduated; receptacle naked; corollas yellow, orange, 

 or purple; achenes subfusiform, ribbed, smooth, beaked; pappus of 

 soft, white, capillary bristles. 



The genus is much in need of a thorough revision, and the present 

 key is only tentative. 



Key to the species 



1. Plant annual; achene 3 to 4 mm. long, the beak about twice as long; involucre 

 pilose or villous with many-celled, often gland-tipped hairs. 



1. A. HETEROPHYLLA. 



1. Plant perennial; achene larger; involucre usually glabrous or glabrate, the 

 hairs, when present, not gland-tipped (2). 

 2. Beak of the achene comparatively stout, nerved throughout, much shorter 



than the body 2. A. glauca. 



2. Beak of the achene slender, not nerved throughout (3) . 



3. Beak of the achene shorter than the body; corollas orange, becoming 



purple in age 3. A. aurantiaca. 



3. Beak of the achene as long as or longer than the body; corollas light yellow, 

 often becoming purplish in age or on drying 4. A. arizonica. 



1. Agoseris heterophylla (Nutt.) Greene, Pittonia 2: 178. 1891. 



Macrorhynchus heterophyllus Nutt., Amer. Phil. Soc. Trans, 

 ser. 2, 7: 430. 1841. 



Pima County, 3,500 to 5,000 (?) feet, plains, mesas, and canyons, 

 March and April. British Columbia to Arizona, California, and 

 northwestern Mexico. 



2. Agoseris glauca (Pursh) D. Dietr., Syn. PL 4: 1332. 1847. 



Troximon glaucum Pursh, Fl. Amer. Sept. 505. 1814. 



Apache, Coconino, Yavapai, Greenlee, Graham, and Pima Counties, 

 6,600 to 10,000 feet, meadows and open coniferous forests, June to 

 October. British Columbia, south to New Mexico, Arizona, and 

 Nevada. 



Kepresented in Arizona by 3 varieties: Var. parviflora (Nutt.) 

 Rydb., chiefly in the southeastern counties, but also on the Kaibab 

 Plateau, with linear or linear-lanceolate entire leaves 2 to 8 mm. 

 wide; var. laciniata (D. C. Eaton) Smiley, in Apache, Coconino, and 

 Yavapai Counties, with retrorse-pinnatifid leaves; and var. dasycephala 



