204 NORTH AMERICAN FLORA [VoLumME 21 
petioles slender, 0.5-2 em. long, the blades rounded-deltoid, 1.5-4 em. long, 1.5-4.5 cm. wide, 
usually as broad as long or even broader, truncate or subcordate at the base, subtruncate, 
broadly rounded, or rarely acute at the apex, rather thin, bright-green, sparsely cinereo- 
puberulent when young, becoming glabrate; flowers axillary or in short-pedunculate 3-flowered 
cymes, usually short-pedicellate, the bracts linear-subulate, usually equaling the fruit, the 
perianth 3.5-4.5 cm. long, white tinged with purple, sparsely cinereo-puberulent outside, the 
limb 2 cm. broad; stamens slightly exserted; fruit narrowly oblong, 5-6 mm. long, truncate 
at both ends, obtusely 5-angulate, cinereo-puberulent or short-villous. 
‘TYPE LOCALITY: Between the Rio Frio and Rio de las Nueces, western Texas. 
DIsTRIBUTION: Southwestern Texas. 
7. Acleisanthes Greggii Standley, Contr. U. S. Nat. Herb. 12: 371. 
1909. 
Plants fruticose below, much branched, the branches slender, cinereo-puberulent, the 
internodes equaling or longer than the leaves; leaves of a pair subequal, the petioles slender, 
3-10 mm. long, the blades broadly deltoid or ovate-deltoid, 1-2.5 cm. long, 0.5-2 cm. broad, 
truncate to slightly subcordate at the base or rarely obtuse, short-decurrent, acute to sub- 
acuminate at the apex, thick and fleshy, flat, glabrous, or when young sparsely cinereo-puberu- 
lent; flowers few, solitary or 3 together, sessile or short-pedicellate, the bracts linear-subulate, 
half as long as the fruit or shorter, the perianth 4—5.5 cm. long, white tinged with purple, the 
tube very slender, sparsely cinereo-puberulent, the limb 1.5 cm. broad; filaments red, exserted; 
fruit narrowly oblong in outline, 6 mm. long, 2.5 mm. in diameter, obtusely 5-angulate, truncate 
at both ends, finely cinereo-puberulent. 
Tyre Locality: Monterey, Nuevo Leén. 
DISTRIBUTION: Southwestern Texas to Nuevo Le6n and Tamaulipas. 
16. BOERHAAVIA I,. Sp. Pl. 3. 1753. 
Dantia (Lippi) Choisy, in DC. Prodr. 132: 449, as synonym. 1849. 
Annual or perennial herbs, sometimes fruticose at the base, branched, variously pubes- 
cent, the stems often with viscous areas in the internodes. Leaves opposite, petiolate, those 
of a pair sometimes unequal, the blades entire or sinuate. Flowers perfect, small, umbellate, 
cymose, capitate, racemose, or solitary, bracteate, the bracts usually minute; perianth corolla- 
like, campanulate or nearly rotate, constricted above the ovary, the limb shallowly 5-lobed. 
Stamens 1-5, exserted or included; filaments capillary, unequal, connate at the base; anthers 
didymous. Ovary stipitate; style filiform; stigma peltate. Anthocarp obovoid or obpyra- 
midal, 3-5-angulate, rarely 3-5-winged, glabrous or pubescent, symmetric. Seed with the 
thin testa adherent to the pericarp; embryo uncinate, the cotyledons enclosing the scanty 
endosperm; radicle elongate, descending. 
Type species, Boerhaavia repens L,. 
Fruit pubescent; perennials. 
Flowers capitate or glomerate, sessile or short-pedicellate 
Branches of the inflorescence glabrous; stems usually glabrous except 
about the nodes, there puberulent; flowers in clusters of 2-4. 1. B. coccinea. 
Branches of the inflorescence puberulent or glandular-puberulent; 
stems copiously pubescent; flowers usually in many-flowered heads. 2. B. caribaea. 
Flowers solitary on long slender pedicels. 
Pubescence of the fruit glandular; stems hirsute below. 3. B. Hitchcockii. 
Pubescence of the fruit not glandular; stems puberulent or glabrous 
below. 4. B. gracillima. 
Fruit glabrous. 
Plants perennial. 
Leaf-blades suborbicular to broadly ovate. 
Flowers glomerate at the ends of long slender axillary peduncles; 
perianth about 5 mm. broad. 
Flowers in ample terminal cymes; perianth 8-13 mm. broad. 
Leaf-blades linear to linear-lanceolate. 
5. B. ciliata. 
6 
Stems glabrous, at least below; stamens usually 3. de 
8 
9 
. anisophylia. 
Stems copiously hirsute or hirtellous below; stamens 5. 
Stems glandular-hirsute below. 
Stems usually glandular-puberulent and hirtellous below, never 
glandular-hirsute. 
B 
B 
B. tenuifolia. 
B. Lindheimeri. 
B 
. linearifolia. 
