380 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
slender pedicels which are 6 mm. long or less; stamens included; fruit nar- 
rowly obpyramidal in outline, almost 4 mm. high, truncate above, acute below, 
with 5 comparatively thin, narrow, transversely wrinkled wings. 
Type U. S. National Herbarium no. 22987, cotype in the herbarium of the 
University of California; collected at Guaymas, Sonora, Mexico, 1887, Palmer 
332, in part. The type sheet of B. alata S. Wats. also bears the same number, 
but the plant is different, its fruit having thick,-corrugated wings, while that 
of B. alata has much wider, thin, and rather membranous wings, which are but 
little narrowed below. From B. triquetra this species is distinguished by its 
larger fruit, its wider and more numerous wings, and the much narrower 
spaces between the wings. 
On the sheet in the National Herbarium which contains the type is a packet 
containing fruit which seems not to belong to this plant, and which is probably 
the fruit of an undescribed species, for it does not seem to agree with that of 
any plant reported from Guaymas. 
6. Boerhaavia universitatis Standley, sp. nov. 
Annual erect, branched from near the base; stems with a short, rather pul- 
verulent pubescence on almost every part, slender, conspicuously brown-dotted ; 
leaf blades lanceolate, 20 to 50 mm. long and 5 to 10 mm. wide, acute, rather 
obtuse at the base, of about the same color on both surfaces, conspicuously 
black-dotted below; petioles very short; branches of the inflorescence alternate, 
paniculate, slender; ultimate peduncles 10 to 12 mm. long; flowers almost ses- 
sile, in umbels of about 5, whitish, 1.5 mm. long; fruit 2.5 mm. long, very nar- 
rowly obpyramidal, with 5 thin, winglike ridges which are truncate above, the 
body of the fruit rugulose between the wings. 
This is nearest B. intermedia, from which it differs in its black-dotted leaves 
and stems, lanceolate leaves, and more distinctly winged fruit. From B, erecta 
it is distinguished by its narrower leaves, by the arrangement of the flowers in 
umbels, all of the pedicels being attached at the very end of the peduncle 
instead of at various points near its end, and by its more distinctly winged 
fruit. Type in the herbarium of the University of Arizona, collected by 
Thornber, September 2, 1903, on the campus of the university, Tucson, Arizona; 
altitude 740 meters. 
Other specimens examined: 
ARIZONA: Corralitas to El Paso, Thurber 782; Tucson, 1867, Palmer 213. 
Texas: ‘No lo ‘ality, 1881, Havard; 1849, Wright 609. Mexican Boundary 
Survey 1188, in part. 
7. Boerhaavia erecta L. Sp. Pl. 3. 1753. 
Type locality, “In Vera Cruce.”’ 
An erect annual; stems usually reddish below, simple at the base but branched 
above, glabrous, or roughened below; leaf blades oblong-ovate, mostly obtuse 
or acutish, 50 or 40 mm. long and 25 mm. wide, rounded or broadly cuneate at 
the base, glabrous, paler beneath, black-dotted on the lower surface, the upper 
blades narrower and more acute; inflorescence dichotomously paniculate- 
branched; flowers about 1 mm. long, the perianth sparingly hispid; stamens 
exserted; fruit in clusters of 8 to 6 at the ends of the slender peduncles, the 
pedicels not attached at the very end of the peduncle, but at various points near 
the end, each fruit on a pedicel as long as itself or shorter; fruit 3 or 4 mm. 
long, narrow, truncate above, narrowly obpyramidal, with 5 ridges which are 
low but distinct, the spaces between them more or Jess rugulose; fruit usually 
green, 
