Dermatophyllum guadalupense
Phytoneuron 2012-3: 1. 2012.
Shrubs, 0.5–2 m, twigs silvery-pubescent. Leaves: rachis 3–6 cm; leaflets 9–13, blades elliptic to ovate, (1–)1.5–2 × 0.8–1.4 cm, base rounded, apex rounded, often emarginate, rarely apiculate, adaxial surface persistently strigose. Racemes 2–8-flowered, congested, 2.5–4 cm; bracts lanceolate to elliptic, apex acute to rounded, abruptly apiculate. Pedicels 2–5 mm. Flowers ascending, 19–28 mm; calyx obconic, 10–14 mm; corolla lavender to purple. Legumes tan, torose, straight to slightly curved, compressed, oblong, 5–14 × 1–1.5 cm, almost leathery. Seeds 3–10, dull reddish, 7–10 mm. 2n = 18.
Phenology: Flowering Apr–May.
Habitat: Slightly gypseous sandstone lenses within limestone, canyons.
Elevation: 1500–2000 m.
Discussion
Dermatophyllum guadalupense is known from the Guadalupe and Brokeoff mountains of Eddy and Otero counties, New Mexico, and Culberson County, Texas. It differs from the Mexican species D. gypsophilum in the number of leaflets (9–13 versus 15–17), the width of the fruit (1–1.5 versus 1 cm), and the length of the seeds (7–10 versus 5–6 mm).
Selected References
None.