Abronia nana

S. Watson

Proc. Amer. Acad. Arts. 14: 294. 1879

Treatment appears in FNA Volume 4. Treatment on page 69. Mentioned on page 61.
Plants perennial, acaulescent or nearly so, usually cespitose. Leaves: petiole 1–5 cm; blade elliptic to lanceolate, shortly ovate, or oblong-ovate, (0.4–)0.5–2.5 × (0.2–)0.4–1.2 cm, less than 3 times as long as wide, margins entire or ± repand and undulate, surfaces glabrous or glandular-pubescent. Inflorescences: bracts lanceolate to ovate, 4–9 × 2–7 mm, scarious, glandular-puberulent, often minutely so; flowers 15–25. Perianth: tube pale pink, 8–30 mm, limb white to pink, 6–10 mm diam. Fruits obovate to obcordate in profile, 6–10 × 5–7 mm, scarious, apex low and broadly conic; wings 5, without dilations, without cavities.

Distribution

Distribution values could not be resolved to valid regions

sw United States.

Discussion

Varieties 2 (2 in the flora).

Abronia nana is a highly variable species. Perhaps contraction of the range of A. nana during the Pleistocene left isolated populations that have since diverged. This is especially apparent on the southern edge of the range of the species. In northeastern Arizona, densely tufted plants with very small blades are similar to short-leaved plants of A. bigelovii from north-central New Mexico.

Based on the fruits, the taxon described as Abronia nana var. harrisii S. L. Welsh is A. elliptica.

References

None.

Lower Taxa

Key

1 Leaf blades elliptic-lanceolate to elliptic-ovate; inflorescence bracts ovate to oblong-lanceolate, or vestigial Abronia nana var. nana
1 Leaf blades shortly ovate to oblong-ovate; inflorescence bracts lanceolate Abronia nana var. covillei