SUNFLOWER FAMILY 309 
funnelform em 5-toothed. Achenes nearly linear, somewhat compressed. Pappus in the 
ray-a no obscure ring, in = disk-achenes of unequal or et ome capillary 
bristles. Aaahess entire at base with narrowly triangular, terminal appendages. yle- 
branches with triangular, acute, oe oi py bidtiaren. much shorter than the stigmatic 
Soe Gr eek, meaning naked ray. ] 
A g of s, occurring from Tex o Califor and fae Besides the following, another species 
occurs shlong Wests % Tarn: Type at sng Pailactis wpe bes? ae A. Gra 
1. Psilactis coulteri A. Gray. Silver Lake Daisy. Fig. 5523. 
Psilactis coulteri A, Gray, Mem. Amer. Acad. II, 4: 72. 1849 
Annual with ascending basal branches 5-30 cm. high, the stems PAL nai seized and loosely 
ineadbie- pilose. Lower leaves petioled, 3 ¢ m. tong acct se iS g in outline, pin- 
natifid or bipi nnatifid, stipitate- een lar; stem-lea nar snag oy pt long, sessile 
and erie cued thick, pale green, lea one or  pinkatind Hee ne spinescent- sipped; 
leaves of the branches smaller, sometimes entire; heads about 2 cm. wide; involucre about 4 m 
high, about 3-seriate, aan te, glandular-granular, the phyllaries oblong, pale below, with sub 
equal, acuminate, herbaceous tips; rays about 30, lavender, about 6 mm. long; achenes pie 
those of the ray epappose, gratis of the disk with a pappus of about 40 unequal bristles up to 2m 
ng. 
lon 
In desert sand or gravel, Lower Sonoran Zone; Mojave Desert, San Bernardino County, California, southern 
Arizona, and Sonora. Type locality: Mexico. Collected by Coulter. March— April. 
5522. Tracyina rostrata 
5523. Psilactis coulteri 
5520. Townsendia — 
5521. Townsendia conden: 
