Part 3, 1918] ALLIONIACEAE 215 
cm, wide truncate to rounded or broadly cuneate at the base, obtuse or acutish at the apex, 
coarsely sinuate-lobate, green above, paler beneath, densely and finely puberulent; racemes 
5-10 cm. long, the flowers on pedicels 1 mm. long; bracts lance-linear, 4-5 mm. long, green, 
glabrous; perianth 6-7 mm. long, glabrous, the tube very short, the limb 7 mm. broad; stamens 
long-exserted; fruit 7 mm. long, short-stipitate, 2 mm. thick in the widest part. 
TYPE LOCALITY: Saltillo, Coahuila. 
DIsTRIBUTION: Nuevo Leén and Coahuila. 
18. COMMICARPUS Standley, Contr. U. S. Nat. Herb. 12: 373. 
1909. 
Perennial herbs or shrubs, pubescent or glabrous, usually decumbent or reclining, the 
stems much branched. Leaves opposite, those of a pair subequal, petiolate, the blades broad, 
more or Jess succulent, entire or sinuate. Flowers perfect, umbellate or verticillate, pedicellate, 
each pedicel bracteate, the bracts forming an involucel; perianth funnelform or campanulate, 
corolla-like, white or green, usually with a distinct tube, constricted above the ovary, the limb 
shallowly 5-lobed, induplicate-plicate. Stamens 2-5; filaments exserted, capillary, unequal, 
connate at the base; anthers didymous. Ovary stipitate, attenuate to a filiform style; stigma 
peltate. Anthocarp cylindric-fusiform, symmetric, finely costate vertically, pubescent or 
glabrous, bearing numerous verrucose glands. Seed with a thin testa adherent to the pericarp; 
embryo uncinate, the cotyledons enclosing the scanty endosperm; radicle slender, elongate, 
descending. 
Type species, Boerhaavia scandens L. 
Perianth 3 mm. long and broad, glabrous or obscurely puberulent; glands of the 
fruit irregularly scattered. 1. C. scandens. 
Perianth 7-8 mm. long, 10 mm. broad, short-villous or hirtellous; glands of the 
fruit grouped in transverse bands. 2. C. Brandegei. 
1. Commicarpus scandens (L,.) Standley, Contr. U. S. Nat. Herb. 
12: 373. 1909. 
Boerhaavia scandens L,. Sp. Pl. 3. 1753. 
Boerhaavia Grahami A. Gray, Am. Jour. Sci. IT, 15: 323. 1853. 
Plants decumbent or usually clambering over shrubs, fruticose or suffrutescent below, 
much branched, the branches slender, pale-green, glabrous, or obscurely puberulent about 
the nodes; petioles slender, 1-2 cm. long; leaf-blades broadly cordate-ovate to ovate-deltoid 
or rarely rhombic-orbicular, 1.5-6.5 em. long, 1-4.5 em. wide, deeply cordate to truncate at 
the base and unequal, attenuate to acute or rarely rounded at the apex, rather succulent, 
bright-green, slightly paler beneath, glabrous, or when young obscurely puberulent or scaberu- 
lous; flowers umbellate, the pedwncles slender, 2—4.5 cm. long, the pedicels slender, 5-10 mm. 
long, glabrous; btacts lanceolate or oblong, 2-3 mm. long, green, ciliolate, caducous; perianth 
greenish-yellow, 3-4 mm. long and broad, glabrous or rarely obscurely puberulent; stamens 2 
or rarely 3, exserted; fruit about 1 cm. long and 2 mm. in diameter, narrowly clavate-cylindric, 
glabrous, bearing few or numerous glands irregularly scattered along the coste. 
TYPE LOCALITY: Santiago de la Vega [Spanish Town], Jamaica. . : 
DistRBUTION: Western Texas to southeastern Arizona and Lower California, and southward 
nearly throughout Mexico; nearly throughout the West Indies; also from Colombia and Venezuela 
to Peru. 
TLLUSTRATTONS: Jacq. Hort. Vindob. 1: pl. 4; Lam. Tab. Encyc. pl. 4; Meerb. Pl. Rar. pl. 21; 
Gaertn. Fruct. pl. 127. 
2. Commicarpus Brandegei Standley, Contr. U. S. Nat. Herb. 
12: 374. 1909. 
Boerhaavia elongata Brand. Proc. Calif. Acad. HI. 2: 199. 1889. Not B. elongata Salisb. 1796. 
Commicarpus Brandegei glabrior Standley, Contr. U. S. Nat. Herb. 12: 374. 1900. 
Plants much branched, 2 meters long or more, prostrate or clambering over shrubs, the 
branches slender, glaucescent, often sparsely short-villous when young but soon glabrate; 
petioles slender, 5-15 mm. long; leaf-blades broadly cordate-ovate or ovate-deltoid, 2-5 cm. 
