Part 3, 1918] ALLIONIACEAE 209 
2.2 cm. long; leaf-blades oval to oblong, suborbicular, or ovate, or the uppermost lanceolate 
or linear-oblong, 1.2-3 cm. long, 0.7-2 em. wide, rounded or obtuse at the base, broadly rounded 
to very acute at the apex, often apiculate, entire or subsinuate, thin, bright-green above, 
paler beneath, often brown-punctate, glabrous or obscurely puberulent; inflorescence cymose- 
paniculate, sparsely branched, the branches ascending, densely glandular-villous with short 
hairs, the flowers short-pedicellate or subsessile, densely cymose-glomerate at the ends of long 
slender peduncles; bracts oblong or obovate, equaling or exceeding the fruit, persistent, thin, 
purplish-red, villous and Jong-ciliate; perianth 3-4 mm. long, pink, glandular-punctate; 
stamens 3, equaling the perianth; fruit obovoid, 2.5-3 mm. long, rounded at the apex, acute 
at the base, stramineous, glabrous, 5-angulate, the angles low, acute, smooth, the sulci broad, 
smooth. 
TYPE LocaLiry: Stony hills near Santa Rita, New Mexico. 
S Distrisution: Dry, gravelly plains and hillsides, western Texas to southeastern Arizona and 
jonora. 
11. Boerhaavia pterocarpa S. Wats. Proc. Am. Acad. 17: 376. 1882. 
Erect or decumbent annual, 1-3 dm. high, sparsely branched, the branches slender, 
ascending, puberulent, often brown-punctate; petioles slender, 2-12 mm. long; leaf-blades 
broadly ovate-rhombic to ovate or lanceolate, 1-2.5 cm. long, 0.3-1.5 cm. wide, rounded or 
obtuse at the base, rounded to attenuate at the apex, entire or subsinuate, thin, green 
above, slightly paler beneath, glabrous or sparsely puberulent; inflorescence of few terminal 
and axillary, densely matry-flowered, headlike cymes borne on slender peduncles 1-3 cm. 
long, the flowers on stout pedicels 1 mm. long or shorter; bracts minute, lanceolate, brown- 
punctate, persistent or deciduous; perianth pink, 1-1.5 mm. long, glandular-punctate; stamens 
included; fruit broadly obpyramidal, 3 mm. long, truncate at the apex, abruptly contracted 
into a short stipe below, glabrous, 3- or 4-winged, the wings narrow, gradually tapering down- 
ward, thin, smooth, the body of the fruit strongly transverse-rugulose. 
Tyre Locality: Apache Pass, Arizona. 
DistTRIBvuTion: Southeastern Arizona and adjacent Sonora. 
12. Boerhaavia megaptera Standley, Contr. U. S. Nat. Herb. 12: 
379. 1909. 
Erect annual, 3-6 dm. high, much branched, the branches slender, ascending, puberulent, 
tinged with red, brown-punctate, the middle and upper internodes with viscous rings; petioles 
slender, 0.4—-2 cm. long; leaf-blades broadly ovate to oblong, ovate-oblong, or linear-lanceolate, 
2-4 em. long, 0.4-1.7 cm. wide, subcordate to rounded at the base, obtuse to long-attenuate 
at the apex, entire or subsinuate, glabrous or obscurely puberulent, green above, pale beneath, 
sparsely brown-punctate; inflorescence cymose-paniculate, much branched, the branches 
slender, ascending, the flowers on pedicels 1-2 mm. long, umbellate at the ends of short slender 
peduncles; bracts minute, thin, ovate or lanceolate, brown-punctate, persistent; perianth 
1-1.5 mm. long, pink, glandular-punctate; stamens included; fruit 3-4 mm. long, 2-3 mm. 
broad, truncate at the apex, acutish at the base, glabrous, 5-winged, the wings thin, smooth, 
the very narrow sulci smooth. 
Tyree LocaLity: On Flattop Mountain, Tucson Mountains, Arizona, at an altitude of 850 
meters. ieaes . 
DIstTRIBUTION: Vicinity of the type locality. 
13. Boerhaavia alata S. Wats. Proc. Am. Acad. 24: 69. 1889. 
Erect or decumbent annual, 3-6 dm. high, much branched, the branches slender, stramine- 
ous, minutely puberulent below, glabrous above, brown-punctate, the middle internodes with 
viscous rings; petioles slender, 2-8 mm. long; leaf-blades ovate-oblong to lance-oblong, or the 
uppermost oblong-linear, 2-3.5 cm. long, 2-12 mm. broad, rounded to broadly cuneate at the 
base, obtuse or acute at the apex, entire, green above, pale beneath, glabrous, sparsely brown- 
punctate; inflorescence laxly cymose-paniculate, much branched, the branches slender, glabrous, 
the flowers on pedicels 2-15 mm. long, solitary or umbellate in clusters of 7 or fewer; bracts 
