Berlandier's Trumpets

Plants herbaceous, often woody at base, overall pubescence of white, capitate hairs 0.1-0.2 mm. Stems prostrate or spreading, much branched, to more than 100 cm, hirtellous to glabrate. Leaves grayish green, sessile or petiolate, those of pair slightly unequal; petiole to 25 mm, hirtellous to glabrate; blade deltate to deltate-ovate, 2-30(-45) × 2-35(-50) mm, base truncate to subcordate or rounded and short decurrent, margins flat or slightly undulate, apex acute to broadly rounded and often apiculate, puberulent to glabrate. Inflorescences solitary flowers or 2-5-flowered cymes, sessile or with pedicel to 5 mm; bracts linear-subulate, 1-7 mm, puberulent, usually sparsely so. Flowers: chasmogamous perianth 2.5-5.5 cm, sparsely puberulent, tube 1-2 mm diam., limbs 13-25 mm diam., stamens 5; cleistogamous perianth 3-12 mm, puberulent, stamens 5. Fruits 5-ribbed with pair of parallel grooves between ribs, each rib and pair of grooves ending at summit in inconspicuous, glandless knob, oblong, truncate at both ends, often constricted ca. 1 mm above base and below apex, 5-8 mm, hirtellous to sparsely puberulent with capitate hairs and with few, scattered, moniliform hairs 0.2-0.3 mm.

Tex.; s to c Mexico.

Flowering early spring-late fall.

Sandy, silty, or clay soils on calcareous or igneous substrates in grasslands, shrublands, or woodlands; 0-1800m.

Nyctaginia obtusa Choisy in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 13(2): 429. 1849; Acleisanthes berlandieri A. Gray; A. greggii Standley

Acleisanthes obtusa (Choisy) Standley, Contr. U. S. Nat. Herb
12: 371. 1909.
Nyctaginia obtusa Choisy, in DC. Prodr. 132; 429. 1849. Acleisanthes Berlandieri A. Gray, Am. Jour. Sci. II. 15: 260. 1853.
Plants procumbent, much branched, the branches slender, densely cinereo-puberulent, becoming glaorate, the internodes often exceeding the leaves; leaves of a pair subequal, the petioles slender, 0.5-2 cm, long, the blades rounded-deltoid, 1.5-4 cm. 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 cinereopuberulent 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 shortvillous.
Type locality: Between the Rio Frio and Rio de las Nueces, western Texas. Distribution: Southwestern Texas.

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-dec urrent, acute to subacuminate at the apex, thick and fleshy, flat, glabrous,, or when young sparsely cinereo-puberulent; 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.
Typ3 locality: Monterey, Nuevo Le6n.
Distribution : Southwestern Texas to Nuevo Le6n and TamauKpas .