STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 315 
throughout, obtuse, rounded or broadly cuneate at the base, 15 to 35 mm. long 
and 15 to 25 mm. wide; one of the opposite leaves large and broadly elliptical, 
the other as broad but shorter and orbicular: petioles almost or quite as long 
as the blades; peduncles stout, 5 or 6 em. long, puberulent or villous: bracts 
4 or 5, broadly lanceolate, 7 mm, long and 2.5 mm. wide, scarious, acute, densely 
viscid-puberulent; flowers about 20 mm. long, limb 8 to 10 mm. wide, tubes 
densely viscid-puberulent: fruit 8S mm. long and a little wider, whitish, the 
body with inconspicuous ribs between the wings, puberulent; wings 3. to Dy 
very broad, 5 to T mm. wide, thin and soft, rounded at the summit and pro- 
longed above the body of the fruit. not much harrowed below. 
Distinguished from A. umbellata by its broader and slightly sinuate leaves, 
its more scarious bracts, and its whiter fruit, the wings of which are much 
broader and less narrowed below as well as more prolonged above. From 
A. gracilis it differs in the thinner and much broader wings; in the shape of 
the fruit, which is broader than long; and in the leaves being less sinuate and 
the whole plant larger and stouter. From A. variabilis it is readily separated 
by its larger leaves, more pubescent stems and leaves, broader bracts, and 
larger flowers. Type in the herbarium of. the University of California, col- 
lected at Del Mar, California, May 12, 1894, Brandegee; same, also, at San 
Diego, April 21, 1894, Brandegee. 
EXPLANATION OF PLATE XNXNITI, d, Plant of Abronia platyphylla; b, fruit of same. 
a, Seale 3; b, seale 2. 
12. Abronia gracilis Benth. Bot. Voy. Sulph, 44. 1844. 
FIGURE 53. 
This species can be determined by its annual root, 
Strongly sinuate leaves, and large tlowers, and by the char- 
acters of the fruit, which is 10 mm. long and almost as 
wide, with 4 or 5 broad wings, these thick and more or 
less coriaceous, light-colored, not prolonged above, and Fig. 53.—Fruit of 
little narrowed below. Abronia gracilis. 
Seale 2. 
y 
Specimens cramined: 
LOWER CALIFORNIA: Magdalena Island, 1889, Brandegec; Abrejos Point, 
1876, Streets; San Ramon, 1886, Orcutt; Magdalena Bay (type lo- 
ality), W. H. Bryant; Calmalii. 1898, Purpus 81, 
13. Abronia villosa S. Wats. Am. Nat. 7: 302. 1873. Figure D4. 
Specimens examined: 
NEVADA: 1872, Licut. Wheeler, type collection; Vegas Wash, 
Lincoln County, 1891, Coville & Funston 425; Moapa, 1905, 
Kennedy 1101. 
CALIFORNIA: San Felipe, 1898, Purpus ; Colorado Desert, 1905, 
CC Brandegee; Temecula, 1887, Clercland 740: near San Luis 
' “ et Obispo, 1876, Palmer; southeastern California, 1897, Purpus 
villosa. Seale 5882; San Diego County, 1887, Orcutt; The Needles, 1884, 
2. Jones 3821; San Bernardino Mountains, 1894, Parish 3207: 
Antelope Valley, 1896, Davy 2214; Ash Hill, Mohave Desert, 1905, 
Hall 6101; Colorado Desert, 1903, Abrams 8224; Carrizo Creek, 1901, 
Brandegee; Fort Mohave, 1860-61, Cooper. 
UTaH: St. George, 1869, Palmer. 
ARIZONA: Yuma, 1881, Vasey; Beaver Dam Creek, 1902, Goodding 765. 
