226 NORTH AMERICAN FLORA [VoLuUME 21 
Stems few, from a thick woody root, erect, 6-10 dm. high, simple or sparsely branched 
below the inflorescence, stout, glaucescent, densely puberulent below, short-pilose above; 
petioles stout, 1.5 cm. long or shorter, very short in the uppermost leaves, pilose; leaf-blades 
ovate, ovate-oblong, or deltoid-lanceolate, 2.5-5 em. long, 0.7-2 cm. wide, obtuse or truncate 
at the base and decurrent, narrowed to the obtuse or acutish apex, entire or undulate, succu- 
lent, thick-coriaceous when dry, glaucescent beneath, densely puberulent or short-pilose; 
inflorescence cymose-paniculate, copiously branched, the branches rather slender, mostly 
alternate, densely viscid-pilose, bearing numerous reduced bractlike sessile leaves; involucres 
numerous, 3-flowered, short-pedunculate, 4-5 mm. long at anthesis, about 8 mm. long in fruit, 
densely viscid-pilose with fulvous hairs, the lobes shorter than the tube, ovate-orbicular, 
broadly obtuse; perianth 10-12 mm. long, sparsely pilose; stamens 5, exserted; fruit obovoid, 
4-5 mm. long, brownish-olivaceous, minutely pilose, the angles broad, smooth, the sides 
rugulose or short-tuberculate; seed broadly obovoid, 2-3 mm. long, pale yellowish-brown. 
Type Locality: Saltillo, Coahuila. 
DisTRIBUTION: Vicinity of the type locality. 
17. Allionia pumila Standley, Contr. U. S. Nat. Herb. 12: 345. 
1909. 
~ 
Oxybaphus nyctagineus pilosus A. Gray, in Torr. Bot. Mex. Bound. Surv. 174, in part. 1859. Not 
Allionia pilosa Nutt. 1818. 
Allionia Brandegei Standley, Contr. U. S. Nat. Herb. 12: 346. 1909. 
Allionia pachyphylla Standley, Contr. U.S. Nat. Herb. 12: 346. 1909, 
saat atc Standley, Contr. U. S. Nat. Herb. 12: 348, in part. 1909. Not A. comata Small, 
Oxybaphus Brandegei Weatherby, Proc. Am. Acad. 49: 492, 1913. 
Stems few or usually numerous, from a thick woody root, ascending or procumbent, 
1-5 dm. long, very stout, much branched, the branches mostly divaricate, sometimes ascending, 
whitish, densely pilose with short soft hairs, or rarely glabrate in age, the internodes usually 
elongate; petioles stout, 2.5 em. long or shorter, those of the uppermost leaves usually very 
short, densely pilose; leaf-blades mostly deltoid or ovate-deltoid, 1.5-5 cm. long, 1.3-4 cm. 
wide, truncate or subcordate at the base and often abruptly short-decurrent, rounded to 
acutish at the apex, entire or subsinuate, very thick and succulent, thick-coriaceous when 
dry, yellowish-green above, glaucous or glaucescent beneath, densely puberulent or short- 
pilose; inflorescence in young plants often wholly of axillary involucres, in mature plants a 
small narrow cyme, this sparsely branched, the branches stout, alternate, densely viscid- 
pilose, usually with numerous small broad reduced bractlike leaves; involucres few, short- 
pedunculate, 3-flowered, at anthesis 3~4 mm. long, in age about 8 mm. long, densely viscid- 
pilose with short fulvous hairs, the lobes ovate-orbicular, rounded or acutish; perianth 8-10 
mum. long, sparsely pilose, pale-pink, the limb about 12 mm. broad, stamens usually 3, long- 
exserted; fruit obovoid, 5 mm. long, brownish-olivaceous, short-pilose, the angles narrow, 
smooth, or rugose on their sides, the sides of the fruit rugulose; seed broadly obovoid, 2.5-3 
m1. long, pale yellowish-brown. 
TyPE Locality: Kingman, Arizona. 
Distrrmvrion: Dry plains and hillsides, western New Mexico to Nevada and southeastern 
California. . ‘ 
18. Allionia rotundifolia Greene, Pl. Baker. 3: 33. 1901. 
Allionia polytricha Standley, Contr. U. S. Nat. Herb. 12: 346, 1909, 
Stems few, from a thick woody root, erect or ascending, 3-7 dm. long, very stout, sparsely 
branched, the branches ascending, pale, densely hirsute below with stiff fulvous hairs, the 
internodes elongate; petioles very stout, those of the lowest leaves one third as long as the 
blades, those of the upper leaves very short or wanting, hirsute; leaf-blades ovate-deltoid to 
deltoid-orbicular or even orbicular, 7 cm. long and 6 cm. wide or smaller, rounded or sub- 
cordate at the base, obtuse to rounded at the apex, thick-coriaceous, entire, yellowish-green, 
above, usually glaucescent beneath, more or less hirsute when young, especially along the veins, 
glabrate in age; inflorescence cymose, sparsely branched, the branches stout, alternate, densely 
