Part 2, 1915] CARDUACEAE : HELENIEAE 99 



floccose; peduncles 1-5 cm. long; involucre campanulate, 5-6 mm. high, 6-7 mm. broad; 



bracts about 10; receptacle convex; ray-flowers about 10; ligules white, 5 mm. long, 



3 mm. wide; disk-corollas nearly 3 mm. long, glandular-puberulent; achenes 3-3.5 mm. 



long, sparingly appressed-hirsute; pappus of 4 or 5 slender subulate squamellae, produced into 



scabrous awns, equaling the corolla, and of as many or more obtuse ones about 1 mm. long. 



Type locality: Gravelly hills near the Colorado of the West. 



Distribution: Arizona to southern Utah, southern California, and Lower California. 



5. Antheropeas tenuifolium Rydbcrg, sp. now 



A loosely floccose annual; stems very slender, e r ect, few-branched, about 1 dm. high; 



leaves narrowly linear, 5-15 mm. long, less than 1 mm. wide, loosely floccose; peduncles 1-2 



cm. long; involucre campanulate, 5 mm. high, 3-4 mm. broad; bracts 8-10, acute; ray-flowers 



mostly 8; ligules white, 2-3 mm. long, 1-1.5 mm. wide, 3-toothed at the apex; disk-corollas 



yellow, scarcely 2 mm. long; tube nearly glabrous; throat glandular-puberulent; achenes 



3 mm. long; pappus of 4 linear squamellae on the angles, 0.6-0.7 mm. long, and of 4 oblong- 



cuneate erose slightly shorter ones alternating with them. 



Tvpe collected at San Sebastian, Lower California, April 28, 1889, T. S. Brandegee (U. S. Nat. 

 Herb. no. 48235). 



57. SYNTRICHOPAPPUS A. Gray, in Torr. Pacif. R. R. Rep. 



4: 106. 1857. 



Microbahia Cockerell, Muhlenbergia 3: 9. 1907. 



Low branched floccose annuals. Leaves alternate, from linear to spatulate, entire or 

 3-lobed at the apex. Heads radiate, solitary at the ends of the branches, short-peduncled. 

 Involucre campanulate; bracts 5-8, oblong, concave and partly enfolding the ray-achenes. 

 Receptacle flat. Ray-flowers 5-8, pistillate and fertile; ligules yellow, or purplish, rose, and 

 white, oval, mostly 3-lobed at the summit. Disk-flowers about 20; corolla-tube very short, 

 much shorter than the elongate-funnelform throat. Anther-tips linear-lanceolate. Style- 

 tips elongate-lanceolate, flattened. Achenes linear, obpyramidal, 5-ribbed, hairy. Pappus- 

 squamellae dissected into numerous barbellate bristles united at the base into a ring, falling 

 off together, or wanting. 



Type species, Syntrichopappus Fremontii A. Gray. 



Rays yellow; pappus present. 1. S. Fremontii. 



Rays rose or flesh -colored with white margins; pappus wanting. 2. 5. Lemmoni. 



1. Syntrichopappus Fremontii A. Grav, in Torr. Pacif. R. R. Rep. 



4; 106. 1857. 



A low, diffusely branched, floccose annual; stems 3-10 cm. high, sparingly floccose, in 

 age glabrate; leaves broadly linear or spatulate, 5-15 mm. long, entire or 3-lobed at the apex, 

 loosely floccose; heads short-peduncled; involucre narrowly campanulate, 5-6 mm. high, 

 4 mm. broad, sparingly floccose; bracts mostly 5, oblong, scarious-margined, acute; ray- 

 flowers mostly 5; ligules golden-yellow, 3-4 mm. long, 2 mm. wide; disk-corollas 4 mm. long, 

 glandular-puberulent; tube very short, much shorter than the funnelform throat; achenes 



3 mm. long, angled, clavate, hirsute; squamellae dissected into 35-40 bright-white bristles, 



4 mm. long, united at the base and falling off together. 



Type locality: "Somewhere between the Rocky Mountains and the Sierra Nevada." 

 Distribution: Southern Utah, Arizona, and southern California. 

 Illustrations: Pacif. R. R. Rep. 4: pi. 15; E. * P. Nat. Pfl. 4 : /. 124, B. 



2. Syntrichopappus Lemmoni A. Gray, Proc. Am. Acad. 19: 20. 



1883. 



Aclinolepis Lemmoni A. Gray, Proc. Am. Acad. 16: 101. 1880. 

 Microbahia Lemmoni Cockerell, 'Muhlenbergia 3: 9. 1907. 



A low loosely floccose annual, branched, only 3-4 cm. high, glabrate in age; leaves linear 

 to linear-spatulate, entire, in age glabrate; heads short-peduncled; involucre campanulate, 



