Pittonia 4: 226. 1900
Plants perennial. Stems prostrate, much branched, forming loose mats, elongate, densely glandular-pubescent, viscid. Leaves: petiole 2–4.5 cm; blade elliptic-oblong to rhombic-ovate, 1–2.5 × 0.6–1.5 cm, margins entire to repand and ± undulate, surfaces glandular-puberulent. Inflorescences: peduncle longer than subtending petiole; bracts lanceolate to elliptic, 3–5 × 1–3 mm, papery, puberulent to glandular-pubescent; flowers 15–35. Perianth: tube greenish, 7–12 mm, limb greenish white, 4–6 mm diam. Fruits biturbinate, tapered at both ends, ± rhombic or fusiform in profile, 4–6 × 2.5–4.5 mm, indurate; wings reduced, appearing as 5 prominent lobes near middle of fruit; peripheral fruits not or only slightly distorted.
Phenology: Flowering summer–fall.
Habitat: Sandy soils, lake shores
Elevation: 2300-2500 m
Of conservation concern.
Abronia ammophila is found on the beaches of Yellowstone Lake, Yellowstone National Park.