316 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
14. Abronia aurita Abrams, Bull. Torr. Club 32: 537. 1905. FIGURE 5d, 
This is much like A. villosa, but is a larger and stouter plaut; its flowers are 
considerably larger, sometimes 3 cm. long; and its fruit is 
broader than long, the body thick and large, vertically ribbed, 
but with few or no transverse ribs, so that the fruit has not 
the pitted appearance of that of A. villosa; the wings very 
broad and usually elevated above the body of the fruit. 
Specimens eramined ¢ 
CALIFORNIA: Palm Springs, 1896, Parish 41388, type collec- 
tion: San Jacinto Plains, 1882, 8. B. & W. I’, Parish 
1156: San Jacinto, 1892, Hasse; near San Jacinto, 
Fiu. 55.—Fruit of 1898, Leibery 3119; San Jacinto Mountain, 1897, Mall 
ee aura. 769: Winchester, Hall 2915; Temecula, 1888, Vasey 
514: San Jacinto, 1890, Mrs. Gregory. 
15. Abronia pinetorum Abrams, Bull. Torr. Club 32: 587. 1905. 
Figure 56, 
This differs from A. aurita in its differently shaped wings 
and rather wider bracts, its somewhat smaller and thicker 
leaves, and its more slender and less pubescent perianth tubes, 
and in the smaller size of the plant. 
Fig. 56.— Fruit of 
Abronia pineto- 
rum, Seale 2. 
Specimens eramined: 
CALIFORNIA: Thomas Valley, San Jacinto Mountains, 1901, 
Hall 2166, type collection. 
16. Abronia pogonantha Heimerl, Kngl. Bot. Jahrb. 11: 87. pl. 2. 1889. 
FIGuRE 57. 
Abronia angulata Jones, Contr. Western Bot. 8: 59. 1898. 
This plant can be distinguished from all other species of the genus by its 
peculiar fruit, which has but two wings. The fruit is smaller than 
in most species, being about 4 mm. long, and is obcordate in outline, 
Npecimens examined: 
CALIFORNIA: Mohave River, 1882, Parish 1345, type collection ; 
of Abronia Lancaster, 1902, Eliver 38663; Argus Mountains, 1897, Pur- 
pogonantha. pus 5879; near Bakersfield, 1891, Coville & Funston 1239; 
Scale 2. Mohave River at Bureham’s ranch, 1901, Parish 4995; 
Darwin Mesa, Argus Mountains, 1897, Jones, type of A. angulata; 
Mohave Desert, 1895, Parish 3775; near Hesperia, 1892, Parish 2458; 
Antelope Valley, 1896, Davy 2214; Hesperia, 1892, Trelease. 
iG, 57.—Fruit 
17. Abronia alpina Brandeg. Bot. Gaz. 27: 456. 1899. FIGURE 58. 
This is quite distinct from all other Abronias by the small size 
of the plant, its small orbicular leaves, their long petioles, the few 
flowers in each head, and the exalate fruit. It may be merely a 
depauperate form of A, villosa. 
Specimens eramined: 
CALIFORNIA! Monatchy Meadows, Mount Whitney, Purpus 
1877, type. Fig. 58.—Fruit 
: : : . . . of Abronia al- 
18. Abronia covillei Heimerl, Smithson. Mise. Coll, 52: 197. 1908." pina. Seale 4, 
PLATE XXNIV. 
A perennial plant, cespitose, forming dense, leafy clumps which are 10 to 15 
em. wide: root stout, about 1 cm, thick above; stems iMmany rising from the 
a'The descriptions of this and 1. bigelorii were t ‘anslated by the author from 
Latin descriptions furnished by Doctor Heimerl, which are published in their 
original form in the Smithsonian Miscellaneous Collections as here cited, 
