212 NORTH AMERICAN FLORA [VoLuME 21 
thin, green above, paler beneath, brown-punctate, puberulent; inflorescence cymose-paniculate, 
much branched, the branches slender, glandular-puberulent, viscid-villous, or glandular- 
hirtellous, the flowers on pedicels about 1 mm. long, in dense or somewhat interrupted racemes, 
these with glabrous rachises; bracts about as long as the fruit, persistent, ovate-orbicular or 
ovate, abruptly acuminate or long-cuspidate, very thin, purplish, short-villous and ciliate; 
perianth pink, 1.5 mm. long; stamens 3 or 4, included; fruit broadly oblong, rounded at the 
apex, 2 mm. long and over 1 mm. thick, glabrous, usually 4-angulate, the angles broad, acute, 
smooth, the sulci broad, rugulose. 
Type LocaLity: Pebbly hills near El Paso [Texas or Chihuahua]. 
Pee Dry, gravelly plains and hillsides, western Texas to Nevada, and southward 
to Sonora. 
20. Boerhaavia Rosei Standley, Contr. U.S. Nat. Herb. 13: 424. 
1911. 
Erect annual, 5 dm. high, much branched, the branches slender, ascending or spreading, 
puberulent, above densely glandular-puberulent or glandular-hirtellous; petioles rather stout, 
5-12 mm. long; leaf-blades ovate, ovate-oval, or oval, the uppermost often lanceolate, 1.2-2.2 
cm. long, 0.4-1.2 cm. wide, rounded at the base, obtuse to very actite at the apex, entire or 
subsinuate, thin, green above, paler beneath, glabrous or sparsely puberulent; inflorescence 
cymose-paniculate, much branched, the branches slender, glabrous, the internodes usually 
viscous, the flowers on stout pedicels 1 mm. long or shorter, in long slender interrupted racemes; 
bracts minute, thin, lanceolate, ciliolate, deciduous; perianth pink, 1 mm. long, glabrous; 
stamens included; fruit narrowly obpyramidal, 2.5 mm. long, truncate at the apex, glabrous, 
green, 5-angulate, the angles smooth, acute, the sulci broad, open, smooth or obscurely rugu- 
lose. 
Type LOCALITY: In sandy soil along the Rio Fuerte near Fuerte, Sinaloa. 
DisTRIBUTION: Known only from the type locality. 
21. Boerhaavia alamosana Rose, Contr. U. S. Nat. Herb. 1: 110. 
1891. 
Erect annual, 3-5 dm. high, much branched, the branches slender, ascending, puberulent 
and sparsely hirtellous; petioles slender 3-8 mm. long; leaf-blades lanceolate or linear-lanceo- 
late, 1.2-3.3 cm. long, 3-5 mm. wide, rounded at the base, acute to long-attenuate at the 
apex, entire or subsinuate, green above, pale beneath, brown-punctate, puberulent; inflores- 
cence cymose-paniculate, much branched, the branches slender, ascending, glabrous, the 
flowers on pedicels 1-2 mm. long, in short, slender, remotely fowered racemes; bracts lanceo- 
late, thin, ciliolate, brown-punctate, shorter than the flowers, deciduous; perianth 3 mm. long, 
white, glabrous or puberulent; stamens 4, exserted; fruit obovoid, 2.5 mm. long, rounded at 
the apex, acute at the base, glabrous, 5-angulate, the angles broad, rounded, smooth, the 
sulci narrowly linear, nearly closed, smooth. 
Typz Locality: Hillsides about Alamos, Sonora. 
PDistRIBUTION: Known only from the type locality. 
22. Boerhaavia Coulteri (Hook. f.) S. Wats. Proc. Am. Acad. 
24: 70. 1889. 
Senkenber gia Coulteri Hook. f.; Benth. & Hook. Gen. Pl. 3: 6, hyponym. 1880. 
Boerhaavia spicata Palmeri S. Wats. Proc. Am. Acad. 24: 70. 1889. 
Boerhaavia Waisoni Standley, Contr. U. S. Nat. Herb. 12: 384. 1909. 
Erect or decumbent annual, 2-8 dm. high, much branched, the branches slender, ascend- 
ing, green or stramineous, puberulent, often sparsely villous or hirtellous above; petioles 
slender, 0.5-2 cm. long; leaf-blades broadly ovate-rhombic, oval, oblong, deltoid-ovate, ovate, 
or lanceolate, 1.5-5 cm. long, 0.5-2.2 cm. wide, rounded at the base, rounded to very acute 
at the apex, thin, entire or sinuate, green above, pale beneath, glabrous or sparsely puberulent; 
inflorescence cymose-paniculate, much branched, the branches slender, glabrous, usually 
with viscid internodes, the flowers on pedicels 1 mm. long or shorter, in slender interrupted 
