Prosopis kuntzei Harms
Family Fabaceae, Subfamily Mimosoideae
NOTE: Very few seeds (less than five) of Prosopis kuntzei were available for examination. Therefore, the description and images in this fact sheet may not be representative of this species’ seeds.
Pods thick, linear-oblong, straight or subfalcate; 10–17 cm long, 1.5–2.6 cm wide, 6–15 mm thick. Short-stipitate, apex mucronate, margins straight to slightly undulate. Rough and wrinkled or semismooth, sometimes bumpy over endocarp segments, nearly black when ripe, seed chambers sometimes visible. Endocarp segments subquadrate or transversely rectangular, bony, closed 12 mm long, 12 mm wide, 6 mm thick; mesocarp mealy-spongy, dry. Seeds oriented longitudinally.
Seeds obovate in outline, 7–10 mm long, 4.8–6.7 mm wide, 1.5–2.9 mm thick, with an umbo, sometimes with raised pleurogram-shaped ridge surrounding pleurogram, elliptic to narrowly elliptic in cross section. Lens same color as testa, a mound.
Pod is distinctive; usually thick, large, heavy and nearly black at maturity. Seeds are relatively large.
Prosopis sericantha Gillies ex Hook. & Arn. (Pod is similar.)
Argentina, Bolivia, Paraguay
mixed subxerophytic woods
Prosopis kuntzei is a spiny, almost leafless tree, 4–10(15) m tall. The heartwood is bluish-black, resists decay and is hard and flexible. Lumbered for various uses such as fence posts, and has been used by the Chaco Indians for bows and spears. The pods usually remain in one piece, but may break into one- to several-seeded segments.