FLOWERING PLANTS AND FERNS OF ARIZONA 1023 



131. NEMOSERIS 



Glabrous branching annuals; leaves mostly pinnatifid; heads rather 

 large, solitary at the tips of the branches and branchlets, white; 

 involucre of about 7 to 15 equal, lanceolate, acuminate, scarious- 

 margined phyllaries and of some much shorter, unequal, outer bract- 

 lets; achenes subfusiform, ta'pering into a beak; pappus of long- 

 plumose setae. 



Key to the species 



1. Corolla? exceeding the involucre by about 5 mm.; achenes with a slender beak 

 about as long as the body; pappus dull or brownish white, the bristles 

 plumose essentially to the apex with straight hairs. _ 1. N. califorxica. 



1. Corollas exceeding the involucre by 10 mm. or more; achenes with a more gradu- 

 ally tapering and stouter beak shorter than the body; pappus bright white, 

 the bristles not plumose near the apex, the hairs of the plume softer, sub- 

 arachnoid 2. N. NEO.MEXICAXA. 



1. Xemoseris calif ornica (Xutt.) Greene, Pittonia 2; 193. 1891. 



Rafinesquia californica Xutt., Amer. Phil. Soc. Trans, ser. 2, 

 7: 429. 1841. 



Mazatzal Mountains (Gila-Maricopa Counties), Santa Catalina 

 and Baboquivari Mountains (Pima County), probably elsewhere, 

 3.500 to 4.500 feet, April and May. Southwestern Utah to southern 

 Arizona, California, and northern Baja California. 



2. Nemoseris neomexicana (A. Gray) Greene, Pittonia 2; 193. 1891. 



Rafinesquia neomexicana A. Gray, PL Wright. 2; 103. 1853. 



Mohave, Maricopa, Pinal, Pima, and Yuma Counties, 500 to 3,000 

 feet, abundant on plains and mesas, March to May. Western Texas 

 to southern Utah, southern California, and northern Baja California. 



One of the conspicuous spring flowers of the more desert parts of 

 the State. 



132. TRAGOPOGON. Goatsbeard 



Biennial or perennial, nearly glabrous herbs; leaves elongate, grass- 

 like, strongly nerved, entire, somewhat clasping; heads large, yellow 

 or purple, solitary on often fistulose peduncles; involucre of 8 to 13 

 lanceolate, acuminate, equal phyllaries; achenes subfusiform, long- 

 beaked, muricate; pappus of somewhat flattened plumose bristles. 



The well-known garden vegetable, salsify, oysterplant, or vegetable- 

 oyster is T. porrifoliMS L. 



Key to the species 



1. Phyllaries 8 or 9, equaling or shorter than the chrome-yellow corollas. 



1. T. PRATEXSIS. 



1. Phyllaries usually 10 to 13, much longer than the lemon-yellow corollas. 



2. T. DUBIUS. 



1. Tragopogon pratensis L., Sp. PI. 789. 1753. 



Coconino County, where common in waste ground near FlagstafT 

 and Williams, also at Lakeside (Navajo County), summer. Widely 

 distributed in the United States and Canada; naturalized from 

 Europe. 



2. Tragopogon dubius Scop., Fl. Cam. ed. 2, 2: 95. 1772. 

 Walnut Canyon, Coconino County, 6.800 feet (Whiting 2841), 



summer. Colorado to Idaho. New Mexico, and Arizona; adventive 

 from Europe. 



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