STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 317 
top of the root, woody, the branches interlaced, procumbent, much shortened, 
about 3 or 4 em, long, bearing fascicles of leaves and pedunculate heads of 
flowers, the aspect of the plant being very much like that of A. nana; leaves 
radical (in appearance only), small; blades shortly ovate, subtruncate at the 
base or obtuse or slightly cordate, 7 to 18 mm. long and 5 to 9 mm. wide, ab- 
ruptly contracted into a petiole 10 to 30 mm. long, at the apex very obtuse to 
rounded, thickish, of the same color on both surfaces, light-green, subentire or 
somewhat undulate, very minutely pulverulent-puberulent with very short, 
spreading, eglandulose, rather abundant hairs, the lateral nerves fine and few 
(2 or 3); peduncles 17 to 24 mm. long, slender, erect, more or less reddish, 
hirtellous above with more or less unequal, minute hairs, the pubescence being 
like that of the leaves only more conspicuous; heads of flowers rather small, 
about 2 cm. broad, each composed of 6 to 12 flowers, the flowers rather erect ; 
bracts few (usually only 4 to 6) and membranaceous, lanceolate, about 6 mim. 
long and 2 mm. wide, rather acute to somewhat acuminate, greenish-white, 
densely and finely puberulent; flowers small, about 11 mm. long; ovary subtur- 
binate, 2.5 mm. long and 2 mm. wide, with 5 prominent angles, puberulent (the 
glabrate base excepted) with rather long and puberulent, eglandulose hairs; 
tube of the perianth 1 mm. wide below, slightly and gradually dilated above 
to 1.5 mm., greenish, finely and sparingly puberulent above, the pubescence 
being a little more dense below; limb about 8 mm. wide (white?), deeply di- 
vided with obcordate lobes which are emarginate for about half their length ; 
stamens 5 to 7, the anthers a little more than 1 mm. long; pistil 6 mm. long, 
the stigma about 1.5 mm. long; fruit not present in the specimens. 
Fine specimens were collected in California in the Inyo Mountains in Inyo 
County by Coville & Funston, Death Valley Expedition, no. 1782, distributed as 
A. nana. Type in the National Herbarium. 
The plant differs from A. nana in its very minute pubescence which is not 
glandular and its ovate leaves, in having lanceolate bracts which are not scart- 
ous und are smaller than in that species, and in its smaller flowers. 
EXPLANATION OF PLATE XXXIV.—Plant of Abronia covillei. Natural size. Drawing 
by W. Liepoldt. 
19. Abronia nana 8. Wats. Proc. Am. Acad. 14: 294, 1870. 
Specimens ercamined: 
Uran: Pahreah, 1894, Jones 5291a,. 
NEVADA: Highland Peak, 1898, Purpus 6431, 6278: Mormon Mountains, 
1906, Kennedy & Goodding. 
ARIZONA: Grand Canyon, 1884, Lemmon. 
CALIFORNIA: San Bernardino Mountains, 1894, Parish 3046, 
19a. Abronia nana lanciformis Jones. Contr. Western Bot, 11: 2. 1903. 
This differs slightly from the species in the rather narrower bracts and 
narrow, oval, acute leaves which have a tapering, acutish base. 
Specimens eramined: 
ARIZONA: Hackberry, 1884, Jones 4689, type collection: Peach Springs, 
1884, Jones. 
20. Abronia bigelovii Heimerl, Smithson. Mise. Coll, 53: 197. 1908.4 
PLATE XNXXYV, 
A perennial plant with a shortened, woody stem which bears at the top a 
dense fascicle of leaves and a long-peduncled head of flowers like A. nana ; 
7See footnote, page 316. 
