322 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
o1, Abronia pumila Rydb, Bull. ‘Torr. Club 29: 683. 1902, 
Specimens crdinined : 
Uran: Emery, 1894, Jones 5445q: 6 miles up Salida Canyon, 1894, Jones 
d4ti6a, types. 
32, Abronia elliptica A. Nelson, Bull. Torr. Club 26:7, 1899. iGure 60, 
Abronia bakeri Greene, Plantae Bakerinnae 3:32. 1901, 
Abronia fragrans clliptica Jones, Contr, Western Bot. 11:3. 
1903. 
This plant has numerous glabrous or puberulent stems from a 
woody base; the bracts usually have a reddish or purplish tinge 
below, which is characteristic of this species alone: the stems also 
Fic 60.—Fruit have a peculiar reddish tinge or are sometimes glaucous, 
i oti Specimens examined: . 
Seale 2. WYOMING: Green River, 1897, A. Nelson 8021, type: Fort 
Steele, 1901, Tircedy 4615; Medicine Bow River, 1898, 
EF, Nelson 48398: Bates Creek. 1901, Goodding 196; Sheep Creek, 1899, 
Charles Schuchert; Cummins, 1895, 4. Nelson 1475. 
Uran: Diamond Valley, 1902, Goodding S22; Modena, 1902, 1006. 
CoLokADO: Deer Run, 1901, Baker 89: Grand Junetion, 1901, Baker 92; 
Rifle, Gartield County, 1900, Osterhout 2131+ Grand Junction, TS91, 
Hasticood, 
oo, Abronia orbiculata Ntandley, sp. nov. PLATE XL, Ficure 2. 
Perennial, much branched from the base: stems ascending, 25 cm. high, 
glandular-puberwlent throughout; leaf blades orbicular or very broadly ellipti- 
‘al, rounded at both ends, thick, glandular-puberulent throughout; petioles 
mostly much longer than the blades; peduncles 35 to 50 mim. long, sparingly 
puberulent; bracts 5, elliptical, scarious, obtuse; flowers scarcely more than 10 
mm. long, their tubes sparingly puberulent or glabrous: fruit turbinate, 5 min. 
long and 8 mum, wide, with narrow thin Wings, these truncate above or slightly 
rounded, the fruit thus either obpyramidal or obcordate in outline. 
Nearest A. elliptica, from which it is distinguished by its thicker, orbieular 
leaves, its smaller flowers, and its viscid-puberulent stem. From 4. pionila it 
differs chiefly in the shape of the leaves and the larger obtuse bracts. ‘Type 
U. S. National Herbarium no. 23045, collected at Cottonwood Springs, Vegas 
Valley, Nevada, April 30, 1891, Vernon Bailey, 1886. 
EXPLANATION OF PLATE XL.-—See under A bronia glabrifolia, p. 321, 
34. Abronia sparsifolia Standley, sp. noy. PLATE XNXI, Figure 2. 
Annual; stems erect, slender, branched, glaucescent, minutely glandular- 
pubescent above; internodes rather long; leaf blades ovate, the lower ones 
broadly so, obtuse, thick, glaucous beneath, glabrous; bases of the lower lenves 
semicordate, of the upper ones rounded, the uppermost blades more or less 
puberulent; petioles of the lower leaves much longer than the blades, those of 
the upper ones shorter; peduncles 2 to 4 cm, long, granular-puberulent, divari- 
eate; bracts elliptical or narrowly obovate, acutish, 10 mm. long and 4 or 5 
mm. wide, puberulent, scarious; flowers numerous, 15 mm. long, their tubes 
glandular-puberulent; fruit obpyramidal in outline, 65 mm, long and about as 
wide, with several wide, thin, double wings which are rounded or truneate 
above, 
From .4. elliptica this can be distinguished by its narrow, acutish bracts, 
broader leaves, and more branched stem: from A. fallax by its broader and 
glaucous leaves, less leafy stems, and more slender habit. Type in the her- 
