246 NORTH AMERICAN FLORA [VoLumE 21 
long, acute or attenuate, scarious, viscid-villous outside, perianth about 2 em. long, white or 
pink, the tube puberulent or glabrate above, usually densely long-villous below, the limb 6-8 
mim. broad; fruit orbicular-obcordate, 3-6 mm. long, compressed, 2-winged, rounded or obtuse 
at the base, the body finely reticulate-veined, the wings thin, obsctrely veined, minutely cilio- 
late; seed obovate, 2 mm. long, compressed, dark-brown, lustrous. 
TYPE LOCALITY: Sandy banks of the Mohave River, California. 
DistR1BuTIoN: In sandy soil, Inyo County to Los Angeles County, California. 
Intusrrations: Bot Jahrb. 11: pl. 2; Contr. U. S. Nat. Herb. 12: f. 57. 
5. Abronia pinetorum Abrams, Bull. Torrey Club 32: 537. 1905. 
Abronia aurita Abrams, Bull. Torrey Club 32: 537. 1905. 
Abronia villosa aurita Jepson, Fl. Calif. 455. 1914. 
Annual, much branched, the branches ascending, decumbent, or procumbent, 2-8 dm. 
long, stout, viscid-villous with long slender hairs; petioles slender, 1-5 cm. long, villous; leaf- 
blades rhombic-orbicular to oval or deltoid-ovate, 1.5-8 cm. long, 1-6.5 cm. wide, subcordate 
to obtuse at the base, sometimes short-decurrent, broadly rounded to obtuse at the apex, 
entire or undulate, viscid-villous on both surfaces or sometimes glabrate above; peduncles 
stout or slender, 3-12.5 cm. long, villous; bracts linear-lanceolate to ovate-lanceolate, 8-12 
mm. long, attenuate or long-attenuate, viscid-villous outside; perianth 2.5-3.5 cm. long, 
purplish-red, the tube puberulent, short-villous, or glabrate above, long-villous below, the 
limb 1.5-2 cm. wide; fruit 7-15 mm. long and usually broader, the body indurate, rugose- 
veined, the 3 or 4 wings thin, broad, usually extended above the body, rounded, acutish, or 
truncate at the apex, smooth or obscurely rugose-veined, stramineous or whitish, usually 
villous-ciliate; seed oblong, 2-4 mm. long, brown, lustrous. 
TyYPe Locality: Open pine forests, Thomas Valley, San Jacinto Mountains California. 
DISTRIBUTION: Riverside and San Diego counties, California. 
ILLUSTRATIONS: Contr. U. S. Nat. Herb, 12: f. 55, 56. 
6. Abronia villosa S. Wats. Am. Nat. 7: 302. 1873. 
Annual, much branched, the branches stout, 1-5 dm. long, ascending, decumbent, or 
procumbent, villous and usually very viscid, often tinged with red; petioles slender or stout, 
0.5-3.5 em. long; leaf-blades rhombic-ovate to oval, oblong, deltoid-ovate, or suborbicular, 
1-3.5 cm. long, 1-2.5 cm. wide, rounded or subcordate at the base and often very unequal, 
sometimes short-decurrent, broadly rounded to acutish at the apex, entire or sometimes 
undulate, viscid-puberulent or glabrate on the upper surface, usually viscid-villous beneath; 
peduncles slender, 2-8.5 cm. long, densely or sparsely viscid-villous; bracts linear-lanceolate to 
ovate-lanceolate, 6-9 mm. long, attenuate or long-attenuate, scarious, viscid-villous outside; 
perianth 17-20 mm. long, purplish-red, the tube densely villous throughout with short or 
long hairs, rarely only puberulent above, the limb about 1 cm. broad; fruit 6—8 mm. long and 
often broader than long, the body indurate, rugose-veined, villous above, the wings 3 or 4, 
or sometimes abortive, broad, thin, usually prolonged above the body, rounded to acutish 
above, whitish, stramineous, or tinged with red, ciliolate above; seed narrowly oblong, 2.5 mm. 
long, dark-brown, lustrous. 
Type Locatity: Arizona. . 
DistrrBurion: In sandy soil, southwestern Arizona, western Sonora, and southern California, 
ILLUSTRATION: Contr. U.S. Nat. Herb. 12: f. 54. 
7. Abronia acutalata Standley, Contr. U. S. Nat. Herb. 12: 312. 
1909. 
Annual, much branched, the branches prostrate, stout, short-villous with viscid whitish 
hairs; petioles stout, 1-4.5 cm. long; leaf-blades ovate to ovate-oval or oval, 2-5 cm. long, 
0.8-3 cm. wide, rounded to acute at the base and often very unequal, rounded or very 
obtuse at the apex, entire, green, minutely viscid-puberulent or glabrous; peduncles slender, 
2.5-4.5 cm. long, villous with short viscid hairs; bracts lanceolate, very acute, 5 mm. long, 
viscid-villous; perianth 12 mm. long, the tube villous with short viscid hairs, green, the limb 
