Part 3, 1918] ALLIONIACEAE 251 
obtuse at the base or rarely subcordate, rounded to acute at the apex, efitire or subsinuate, 
concolorous or paler beneath, densely viscid-puberulent or short-villous or rarely glabrate; 
peduncles slender or stout, 3—12 cm. long, viscid-villous; bracts oval, ovate-oval, or ovate, 
10-18 mm. long, 4-12 mm. wide, acute or attenuate, scarious, whitish, viscid-villous or 
puberulent; flowers numerous, the perianth 20-25 mm. long, viscid-puberulent or short-villous, 
the tube very slender, greenish, the limb 7-10 mm. broad, white or very rarely purplish-red; 
fruit usually biturbinate, 5~10 mm. long, coriaceous, short-villous or puberulent, the inner 
ones of each head deeply 5-lobed, the lobes compressed and winglike, even at the summit, 
narrowed or truncate above, coarsely reticulate-veined, the outer fruits often fusiform and 
elobate; seed obovate, 2.5-3 mm. long, dark-brown, lustrous. 
TYPE LocaLiry: Sandhills of the Platte River [Colorado?]. 
DistTRIBUTION: Usually in sandy soil, South Dakota to Idaho, southeastern Utah, Chihuahua, 
and western Texas. 
Intustrations: Pacif. R. R. Rep. 2: pl. 10; Bot. Mag. pl. 5544; Contr. U. S. Nat. Herb. 12: 
t ee 64, pl. 42, 43; Britt. & Brown, Ill. Fl. f. 1422; ed. 2. f. 1731; Clements, Rocky Mt. FI. pl. 9, 
Abronia speciosa Buckl. was based upon the red-flowered plant, which is known only from a 
few collections from Oklahoma and Texas. It appears to be merely a color variant of A. fragrans. 
19. Abronia elliptica A. Nelson, Bull. Torrey Club 26: 7. 1899. 
Abronia Bakeri Greene, Pl. Baker. 3: 32. 1901. 
Abronia fragrans elliptica Heimerl; Rydb. Bull. Torrey Club 29: 684. 1902. 
Abronia glabra Rydb. Bull. Torrey Club 29: 685. 1902. 
Abronia fragrans elliptica M. E. Jones, Contr. West. Bot. 11: 3. 1903. 
Abronia ramosa Standley, Contr. U. S. Nat. Herb. 12: 321. 1909. 
Abronia glabrifolia Standley, Contr. U. S. Nat. Herb. 12: 321. 1909. 
Perennial, often from a woody root; stems usually numerous, erect or decumbent, 1-5 
dm. long, stout, usually copiously branched, whitish or tinged with red, glabrous or finely 
viscid-puberulent, especially above; petioles slender, 1-4 cm. long, puberulent or glabrate; 
leaf-blades usually oval, oval-oblong, or ovate-oblong, sometimes deltoid or elliptic-ovate, or 
those of the lowest leaves suborbicular, 1-5.5 cm. long, 0.8-3.5 cm. wide, rounded, truncate, 
or obtuse at the base, rounded or obtuse at the apex, succulent, entire or subsinuate, usually 
pale or glaucescent beneath, minutely puberulent or glabrous; peduncles slender, 2~12 cm. long, 
glabrous or puberulent; bracts broadly oval or obovate-oval, 10-12 mm. long, 5-7 mm. wide, 
rounded and often apiculate at the apex, scarious, white or greenish-white, glabrous or minutely 
puberulent; flowers very numerous, the perianth 18-22 mm. long, viscid-puberulent, the tube 
very slender, greenish-white or pinkish, the limb 5-8 mm. broad, white; fruit turbinate, or the 
outer ones biturbinate, 5-8 mm. long, subcoriaceous, puberulent or short-villous above, stra- 
mineous or olivaceous, usually deeply 5-lobed, the lobes compressed, finely reticulate-veined, 
rounded or truncate above and flattened at the apex; seed elliptic-oblong, 2.5-3 mm. long, 
brown, lustrous. 
Tyre LocaLity: Green River, Wyoming. : ; 
Distripution: In dry, clay or sandy soil, Wyoming to northeastern Arizona and northwestern 
New Mexico. 
ILLustRatTiIons: Contr. U. S. Nat. Herb. 12: f. 59, 60, pl. 39, 40, f. 1. 
20. Abronia orbiculata Standley, Contr. U. S. Nat. Herb. 12: 322. 
1909. 
Perennial; stems numerous, ascending, 1.5-3 dm. long, stout, much branched, whitish, 
finely viscid-puberulent; petioles slender, 1-2.5 cm. long, viscid-puberulent ; leaf-blades orbicu- 
lar, rounded-oval, or rounded-deltoid, 0.8-1.7 cm. long, 0.6-1.4 cm. wide, rounded or truncate 
at the base, broadly rounded at the apex, entire, thick and succulent, concolorous or slightly 
paler beneath, densely and minutely viscid-puberulent, or glabrate in age; peduncles slender, 
3-5 em. long, viscid-puberulent; bracts broadly oval, 1 em. long, 5-7 mm. wide, rounded at 
the apex, scarious, whitish, minutely viscid-puberulent; flowers numerous, the perianth 12-14 
mm. long, viscid-puberulent, the tube slender, the limb about 5 mm. broad, white; fruit 
turbinate, 5 mm. long, whitish-puberulent, greenish-stramineous, usually deeply 5-lobed, the 
lobes compressed, truncate or rounded at the apex. 
TyPE LOCALITY: Cottonwood Springs, Vegas Valley, Nevada, at an altitude of 1050 meters. 
DISTRIBUTION: Known only from the type locality. 
ILLUSTRATION: Contr. U. S. Nat. Herb. 12: pl. 40, ten. 
