STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 379 
Flowers’3 mm, long or 
more, white; stamens 
2 or 3; bracts nar- 
rowly ovate or lanceo- 
late___---- 16. B. vranti, 
1. Boerhaavia pterocarpa S. Wats. Proc. Am. Acad. 17: 876. 1882. 
Type locality, “Apache Pass, Arizona.” 
Specimens examined: 
ARIZONA: Tucson, 1892, Toumey; Tucson, 1903 and 1904, T’hornber 259, 548. 
Mexico: Near Altar, Sonora, 1904, Griffiths 6887, 
2. Boerhaavia alata S. Wats. Proc. Am. Acad. 24: 69. 1889. 
Specimens examined: 
Mexico: Guaymas, 1887, Palmer 332, type collection. 
A sheet of Palmer’s in the herbarium of the University of California and 
one in the National Herbarium bearing this number contain a very different 
plant described elsewhere as a new species. 
3. Boerhaavia megaptera Standley, sp. nov. 
Annual; erect, about 30 cm. high; branched from neur the base; stems 
slender, sparingly short-puberulent; leaf blades 20 to 25 mm. long and 8 to 
12 mm. wide, narrowly elliptical to almost linear above, of about the same 
color on both surfaces, rather obtuse or mostly acute at the apex, obtuse at 
the base; petioles about one-half as long as the blades: branches of the 
inflorescence alternate, forming a narrow panicle; peduncles 1 cm. long or 
more, each bearing an umbel of 8 to 5 pedicellate flowers; perianth about 1 mm. 
long or slightly longer, pinkish; fruit 3.5 mm. long and about 2.5 mm. wide, 
with 5 thin, broad wings, these only slightly narrowed toward the base and 
above rounded slightly above the body of the fruit; body and wings glabrous 
and smooth, not at all rugulose. 
The only species with which this is likely to be confused is B. alata, from 
which it may be distinguished by its fruit being acute below, while that of the 
latter species is only slightly narrowed; by the fact, also, that the fruit is col- 
lected in fascicles of 5 or 6 and is on shorter pedicels, and that the flowers of the 
new species are much smaller. The fruit of the plant might almost place it 
in Selinocarpus, but the wings, although large, are not membranous as in that 
genus; the habit and flowers, too, show at once that it is a Boerhaavia rather 
than a Selinocarpus, for which it has been mistaken. Type in the herbarium 
of the University of Arizona, collected by Prof. J. J. Thornber on Flattop 
Mountain, Tucson Mountains, altitude 850 meters, September 8, 1903, no. 162. 
4. Boerhaavia triquetra 8S. Wats. Proc. Am. Acad. 24: 69. 1889. 
Specimens cramined: 
Mexico: Los Angeles Bay, Lower California, 1887, Palmer 521, type col- 
lection, and no. 605, 
5. Boerhaavia maculata Standley, sp. nov. 
Annual, erect; stems slender, much branched, minutely puberulent below or 
mostly glabrous, brown-dotted, not glutinous above; blades lanceolate, about 
25 mm. long and 5 mm. wide, acute, rounded at the base, brown-dotted on both 
surfaces, paler below, mostly glabrous; petioles very short; inflorescence panicu- 
late, much branched; flowers 2 or 3 mm. long, single or 2 or 3 in a fascicle, on 
