ALLIONIACEAE 409 
limb spreading, 5-lobed. Stamens 2-5, unequal: filaments very slender, united into a 
cup at the base. Style filiform: stigma peltate. Fruit 5-angled or 5-ribbed, constricted 
under the apex. Seed filling the pericarp to which its testa adheres. Endosperm mealy. 
Calyx-tube over 11 em. long: leaf-blades acuminate. 1. A. longiflora. 
Calyx-tube less than 6 em. long: leaf-blades obtuse or merely acute. 
Stems copiously scabrous-pubescent or puberulent: leaf-blades gradually or ab- 
ruptly narrowed at the base. 
Leaf-blades barely ciliolate: fruit about 4 mm. thick, not ribbed. 2. A. crassifolia. 
Leaf-blades conspicuously ciliolate: fruit about 3 mm. thick, strongly ribbed. 3. A. Wrightii. 
Stems smooth and glabrous, or nearly so: leaf-blades truncate or cordate at the 
base. 4. A. Berlandieri. 
1. Acleisanthes longifldra A. Gray. Stems more or less branched at the base, the 
branches slender, glabrous, trailing, 2-6 dm. long, forking: leaf-blades thickish, lanceo- 
late to rhombic-lanceolate, 1-2.5 cm. long, acute or acuminate at the apex, acute to rounded 
at the base, short-petioled : calyx white or nearly so, 12-15 cm. long: fruit 8-10 mm. long, 
with a constriction above the base and thence slightly narrowed. 
In sandy soil, Texas and New Mexico. Spring to fall. 
2. Acleisanthes crassifólia A. Gray. Stems stoutish, scabrous-pubescent, sparingly 
branched, several dm. long: leaf-blades thick, ovate, 1-3 em. long, acute, undulate, mostly 
rounded at the base, scabrous on both sides; petioles 4 as long as the blades or shorter : 
calyx white, 4-5 cm. long: fruit oblong-oval, 6-7 mm. long, obtusely 4-angled, not ribbed, 
densely scabrous-pubescent. 
In dry soil, along and near the Rio Grande, Texas. Summer and fall. 
3. Acleisanthes Wrightii (A. Gray) Benth. & Hook. Stems branched at the base, 
the branches scabrous-pubescent, spreading, 1-5 dm. long, forking: leaf-blades thickish, 
ovate, oval or ovate-lanceolate, 1-4 em. long, obtuse or acutish, undulate, acute or rounded 
at the base, nearly sessile, or petioles 3 as long as the blades: calyx 4-5 cm. long: fruit 
6-7 mm. long, strongly 5-ribbed, each rib ending in a knob. 
On stony plains or prairies, southern Texas. Spring and summer, 
4. Acleisanthes Berlandiéri A. Gray. Stems slender, glabrous or puberulent near 
the nodes, more or less diffusely branched, the branches prostrate or spreading, 1-4 dm.long : 
leaf-blades deltoid-ovate, 1.5-6 em. long, about as broad, rounded and apiculate at the 
apex, truncate to cordate at the base, the petioles often as long as the blades: flowers fra- 
grant: calyx white, 4-5 cm. long. 
In dry soil, southern Texas and northern Mexico. Summer and fall. 
7. BOERHAAVIA L. 
Slender, often diffuse, glabrous pubescent or glandular herbs, with forking stems. 
Leaves opposite: blades unequal, thickish, entire or undulately toothed. Flowers very 
small, variously disposed, subtended by minute bracts, on jointed pedicels. Calyx cam- 
panulate or funnelform : tube short or elongated: limb often spreading, 5-lobed, deciduous. 
Stamens 1-5, exserted : filaments very slender, united at the base. Ovary oblique: style 
filiform: stigma peltate. Fruit club-shaped to obovoid, 5-10-ribbed. Seed filling the 
pericarp to which it adheres. Fund. 
Leaf-blades linear to lanceolate: calyx-limb rotate. 
Stamens 3: calyx-limb 6-8 mm. broad.) 
Stamens 5: calyx-limb 12-14 mm. broad. E 
Leaf-blades deltoid or broadly oblong: calyx-limb cam ulate. 
Fruit rounded at the apex. we, pu 
. B. tenuifolia. 
. B. linearifolia. 
noe 
Fruit shallowly grooved. 3. B. decumbens. 
Fruit deepl y grooved. : 
Leaves with like-colored surfaces. 4. B. hírsuta. 
Leaves white beneath. 5. B. viscosa. 
Fruit flat at the apex. : 6. B. erecta. 
1. Boerhaavia tenuifdlia A. Gray. Annual or biennial, very slender, glabrous 
below, glandular-pilose above. Stem more or less branched at the base, the branches 
prostrate or spreading, 4-10 dm. long, forking, wire-like, rigid : leaf-blades linear-lanceo- 
late, 1-3 em. long, acute, strongly revolute, glabrous or glabrate, sessile or nearly $0: 
peduncles slender : calyx sparingly pubescent; limb rotate, 6-8 mm. broad: stamens 3, 
exserted : fruit oblong-clavate, 3 mm. long, glabrous, strongly 5-ribbed, rounded at the 
apex. 
In'arid places, Texas. Spring to fall. 
