392 Compositaceae 
BB. Leaves broadly ovate, cordate at base, glabrous and green above, white-woolly 
; beneath; pappus none. ADENOCAULON (p. 395) 
AA. Heads 3—1I0 cm. wide, radiate; basal leaves 1-2 dm. wide, 2—5 dm. long; 
leaves pubescent but not woolly; pappus-bristles capillary, rough. INULA (p. 395) 
MICROPUS 
Annual, low, floccose-woolly. Leaves alternate; in ours linear to lanceolate, 12—16 
mm. long. Heads several-flowered, inconspicuous, in sessile clusters; involucre-bracts few. 
Outer flowers pistillate, each rolled up in a bract; bract laterally flat, falling with the 
seed. Inner flowers with stamens and pistils but sterile, few, bractless; corolla tubular; 
4—5-toothed. Akenes obovate, gibbous, laterally flattish, smooth; apex lateral. Pappus 
none. (Gk. mikros=small, pous—a foot. Why?) U. 
M. californicus F. & M. 
STYLOCLINE 
Annual, low floccose-woolly. Leaves alternate; in ours linear to spatulate, 12—18 
mm. long. Heads in head-like clusters, many-flowered; receptacle columnar; involucre- 
bracts inconspicuous or almost none. Outer flowers pistillate, each rolled up in a bract; 
bract broadly boat-shaped. Inner flowers with stamens and pistil but sterile, few, bracted; 
corolla tubular, 4—5-toothed. Akene obovate or oblong, narrow at base, apex terminal. 
Pappus none except for a few bristles on the sterile flowers. (Gk. stylos—=a column, 
kline—=a bed; referring to the receptacle.) U. 
S. filaginea Gray 
PSILOCARPHUS 
Annual, low, floccose-woolly. Leaves mostly opposite. Heads small, in terminal 
head-like clusters and in the stem-forks, the terminal cluster subtended by a whorl of 
leaves; flowers many, small; receptacle depressed-globose; involucre-bracts few, small. 
Outer flowers pistillate, many, each enclosed by a bract; bract inflated, soft-woolly. In- 
ner flowers with stamens and pistil but sterile, bractless: corolla tubular, 4—5-toothed. 
Akenes oblong or cylindric, flattish, straight, small, loose in the bract. Pappus none. 
(Gk. psilos=naked, carphos—a small dry body; probably referring to the absence of 
pappus on the akenes.) 
A. Leaf-blades widest above their middle; wool of the heads short, close. 
B. Prostrate; leaves oblong to spatulate. W. 
P. tenellus Nutt. 
BB. Ascending; Jeaves narrowly oblanceolate. EF. 
P. oreganus Nutt. 
AA. Leaf-blades often widest below their middle; wool of the heads long, loose. 
C. Mostly simple; leaves 4—10 mm. long; heads densely woolly. E. 
P. brevissimus Nutt. 
CC. Mostly branched; leaves 12-25 mm. long; heads sparsely woolly. W. E. 
P. elatior Gray 
EVAX (Hesperevax, Filago) 
Annual, low, floccose-woolly. Leaves mostly opposite, in ours lanceolate, 8—|2 
mm. long. Heads small, in somewhat head-like clusters; flowers inconspicuous, many; re- 
ceptacle columnar, villous; involucre-bracts chaffy. Outer flowers pistillate, several to 
many, bracted;, bract ovate, chaffy. Inner flowers with stamens and pistil but sterile, 

