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



85. PERICOME 



Perennial herb, branched, puberulent; leaves opposite, hastate- 

 triangular, caudate-acuminate; heads numerous, cymose-panicled, 

 discoid, yellow; phyllaries lightly connate into a cup; achenes narrow- 

 oblong, strongly compressed, villous-ciliate ; pappus a crown of lacerate- 

 ciliate squamellae, sometimes with 1 or 2 awns. 



1. Pericome caudata A. Gray, PL Wright. 2: 82. 1853. 



Mountains of Apache, Navajo, Coconino, Graham, Cochise, and 

 Pima Counties, 6,000 to 9,000 feet, rich soil in coniferous forests, 

 locally abundant, July to October. Southern Colorado and New 

 Mexico to southern Nevada, California, and Chihuahua. 



86. BAERIA 



Low slender annual, slightly pubescent; leaves opposite, linear, 

 entire; heads small, terminal, radiate, yellow; receptacle conical; 

 achenes linear-clavate, 4-angled; pappus none, or of 2 to 5 lanceolate 

 awns. 



1. Baeria chrysostoma Fisch. et Mey., Index Sem. Hort. Petrop. 

 2: 29 (reprint 2: 4). 1836. 



The only form occurring in Arizona is var. gracilis (DC.) Hall, 

 characterized by pubescent achenes with a pappus of 2 to 5 lanceolate 

 awns. Western Gila, Maricopa, Pinal, Cochise, and Pima Counties, 

 1,500 to 3,500 feet, mesas and plains, March to May. Central and 

 southern Arizona to Oregon, California, and Baja California. 



Goldfields. In spring extensive areas are sometimes carpeted with 

 the bright yellow flowers of this plant, which is reported to be cropped 

 by horses. 



87. FLAVERIA^ 



Low glabrous annual, dichotomously branched; leaves opposite, 

 lanceolate, toothed, 3-nerved; heads very small, 1- or 2-flowered, 

 densely glomerate, the glomerules sessile in the forks and termi- 

 nal; phyllaries 1 or 2; ray solitary or none; achenes oblong, 8- to 10- 

 ribbed, glabrous, epappose. 



1. Flaveria trinervia (Spreng.) C. Mohr, Contrib. U. S. Natl. Her- 

 barium 6: 810. 1901. 



Oedera trinervia Spreng., Bot. Gart. Halle 63. 1800. 

 Flaveria repanda Lag., Gen. et Sp. PL 33. 1816. 



Southern Yavapai and Pinal Counties (probably elsewhere), 1,200 

 to 4,000 feet, moist soil at roadsides and on ditch banks, May to 

 November. Florida and Alabama to southern Arizona, southward to 

 South America, probably not indigenous in the United States. 



88. SYNTRICHOPAPPUS 



Dwarf floccose- woolly winter annual; leaves mostly alternate, 

 spatulate to linear, often 3-lobed at tip; heads small, yellow, radiate, 

 solitary at the tips of the branches; paleae of the pappus dissected into 

 numerous bristles, these united only at base. 



9* Reference: Johnston, J. R. a revision of the genus flaveria. Amer. Acad. Arts and Sci. Proc. 39 

 (Gray Herbarium Contrib. 26) : 279-292. 1903, 



