Prosopis palmeri S. Watson
Family Fabaceae, Subfamily Mimosoideae
NOTE: Only thirteen seeds of Prosopis palmeri were available for examination. Therefore, the description and images in this fact sheet may not be representative of this species’ seeds.
Pods linear-oblong, subterete to compressed, subfalcate or straight, 4–9 cm long, 8–10 mm wide, 2–6 mm thick. Apex acute to mucronate, margins nonundulate. Reddish-brown, with delicate V-shaped oblique striate veins; seed chambers not visible. Exocarp and mesocarp both thin and brittle, endocarp membranous, rectangular-segmented in 1 row, but disintegrating and opening easily at maturity. Seeds oriented obliquely to transversely at maturity.
Seeds broadly obovate to suborbicular in outline, often twisted, 5–7 mm long, 4–5.5 mm wide, 1–3 mm thick, umbo absent, mostly elliptic in cross section. Pleurogram wide and rounded. Lens a light-colored mound.
Pods distinctive in the genus because of their shape, length, color, and striations.
mainly on dry riverbeds
Prosopis palmeri is a spiny shrub or tree 1.2–6(7.5) m tall. It is browsed by cattle and much used for fuel. The pods easily break down at maturity, enabling seeds to be released.