Part 3, 1918} ALLIONIACEAE 241 
Body of the fruit not costate; peduncles short, always shorter than the 
_ subtending leaves; perianth densely glandular-puberulent. 3. T. micranthus. 
Perianth 2.5-3.5 cm. long, the limb white or pink. 
Fruit 1.5-2 cm. long; perianth-limb white, pink outside; stems rather 
densely pubescent with short slender hairs; bracts narrowly lanceolate. 4. T. Wootonii. 
Fruit 2-3.5 cm. long; perianth-limb pink; stems sparsely pubescent with 
short, conic or very stout hairs; bracts ovate or lance-ovate. 5. T. cyclopterus. 
1. Tripterocalyx Crux-Maltae (Kellogg) Standley, Contr. U. S. 
Nat. Herb. 12: 328. 1909, 
Abronia Crux-Maliae Kellogg, Proc. Calif. Acad. 2: 71. 1863. 
Plants ascending or procumbent, much branched, the branches stout, 1-3 dm. long, 
viscid-villous with very slender long white hairs or glabrate; petioles 1-4 cm. long; leaf-blades 
elliptic-oblong, ovate-oblong, broadly ovate, or ovate-rhombic, 2-5 cm. long, 2-3 em. wide, 
acute to rounded at the base and often unequal, narrowed to an obtuse apex, bright-green, 
viscid-puberulent when young but soon glabrate; peduncles 1-6 cm. long; bracts ovate or 
lanceolate, 6-10 mm. long, attenuate or long-attenuate, densely viscid-villous; perianth 2-2.5 
em. long, densely long-villous outside or rarely only puberulent, the limb about I cm. broad, 
deeply lobed, bright purplish-pink with a green throat, the lobes deeply bilobate; fruit 1-1.5 
em. long, orbicular or broader than long, the body coarsely transverse-rugose, villous, the 2 
wings thin, very coarsely reticulate-veined, the veins indurate, puberulent or villous, the 
margins ciliolate. 
TYPE LocALIty: Carson Valley, Nevada. 
DISTRIBUTION: Western Nevada and adjacent California. 
InLustTRatiIon: Proc. Calif, Acad. 2: f. 16. 
2. Tripterocalyx pedunculatus (M. E. Jones) Standley, Contr. U. 8. 
Nat. Herb. 12: 328. 1909. 
Abronia micrantha pedunculata M. E. Jones, Proc. Calif. Acad. II. 5: 716. 1895. 
Abronia pedunculata Rydb. Bull. Torrey Club 29: 686. 1902. 
Plants erect or decumbent, 2-3 dm. high, much branched, the branches stout, glabrous 
or minutely viscid-puberulent; petioles 1-4.5 cm. long; leaf-blades ovate-oblong, lance-oblong, 
or broadly ovate, 2.5-4.5 cm long, 1.2-2.5 cm. wide, rounded to broadly cuneate at the base 
and unequal, obtuse or acutish at the apex, scaberulous when young but soon glabrate, green 
above, glaucescent beneath; peduncles 1.5-5.5 cm. long, often longer than the subtending 
leaves; bracts lanceolate or ovate, long-attenuate, 5-10 mm. long, glabrous, obscurely ciliolate; 
perianth 1.5 cm. long, glabrous outside or obscurely puberulent, the limb 4 mm. wide, greenish- 
white; fruit 2-2.5 em. long, rounded or emarginate at the apex, the body 1--3-costate between 
each pair of wings, obscurely viscid-puberulent when young but soon glabrate, the wings thin, 
scabertilous on the margins, with conspicuous slender reticulate veins; seed oblong-cylindric, 
6-7 mm. long, rounded at the apex, acute at the base, brown. 
Type Locality: St. George, Utah, at an altitude of 810 meters, in red sand. 
DistrrBurion: Central Utah to northwestern Arizona. : 
The fruit of this plant resembles that of T. Wootonii and the flowers those of T. micranthus. 
Possibly it is a hybrid between those two species. 
3. Tripterocalyx micranthus (Torr.) Hook. Jour. Bot. & Kew Mise. 
5: 261. 1853.* 
Abronia micrantha Torr. in Frém. Rep. 92. 1843. 
Cycloptera annua Nutt.; A. Gray, Am. Jour. Sci, II. 15: 319, assynonym. 1853. 
Apalopiera annua Nutt.; A. Gray, Am. Jour. Sci. II. 15: 319, assynonym. 1853. 
Tripteridium micranthum Torr.; Britt. & Brown, Ul. Fl. ed. 2. 2: 33, as synonym. 1913. 
Plants much branched, the branches stout, 2-5 dm. long, ascending or procumbent, 
glaucescent, scabrous or viscid-puberulent with short stout hairs, finally glabrate; petioles 
1-5 em. long; leaf-blades lance-oblong, oblong, ovate-oblong, ovate, or rhombic-ovate, 2.5-6 
cm. long, 1-3 cm. wide, broadly cuneate to truncate at the base, narrowed to an obtuse or 
rarely rounded apex, green above, glaucous or glaucescent beneath, scaberulous when young 
but soon glabrate, scaberulo-ciliolate; peduncles 1-2.5 cm. long, much shorter than the sub- 
* By typographical error the specific name was given by Hooker as macranthus. 
