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FNA | Family List | FNA Vol. 4 | Nyctaginaceae | Abronia

5. Abronia bolackii N. D. Atwood, Novon. 12: 167, fig. 1. 2002.

Plants perennial, short caulescent or nearly acaulescent. Stems decumbent to erect, minutely and sparsely glandular-pubescent or ± glabrate, arising from cordlike rhizomes. Leaves: petiole 1-4 cm; blade elliptic-oblong to ovate, 1-4 × 0.5-2 cm, margins entire to shallowly sinuate, often ± undulate, surfaces minutely puberulent or glabrous (especially in age). Inflorescences: peduncle longer than subtending petiole; bracts broadly lanceolate, ovate, obovate, or almost round, 5-10 × 3-10 mm, scarious, apex acute, obutse, or rounded, glandular-puberulent; flowers 15-25. Perianth: tube greenish, 7-11 mm, limb white, 3 mm diam. Fruits broadly turbinate, 5-7 × 3-5 mm, scarious, apex truncate and slightly beaked; wings (3-)5, dilated distally and ± flattened perpendicular to plane of lamina, dilations ± as long as wide, thin walled, cavities extending throughout.

Flowering spring-summer. Gypseous sandy or gravelly soils, open areas, among sparse shrubs; 1700 m; N.Mex.

As far as is known, Abronia bolackii is restricted to gypseous lenses of the Ojo Alamo Formation in San Juan County, New Mexico.


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