Prosopis rojasiana Burkart
Family Fabaceae, Subfamily Mimosoideae
NOTE: Only three seeds of Prosopis rojasiana were available for examination. Therefore, the description and images in this fact sheet may not be representative of this species’ seeds.
Pods linear, straight or curving slightly, compressed, 3.5–5 cm long, 6–8 mm wide. Short-stipitate, apex mucronate, margins nearly straight, faintly undulate. Reddish, smooth or wrinkled appearance, with longitudinally reticulate ridges; seed chambers 5–10. Endocarp segments subquadrate to rhombic, or broader than long, papery to boney, closed, 4–6 mm long, 5–7 mm wide, 2–3 mm thick; mesocarp thin, dry. Seeds oriented longitudinally.
Seeds obovate to rhombic in outline, 3.8–4.9 mm long, 2.2–3.5 mm wide, 1.3–2.7 mm thick, with a ridgelike umbo, asymmetrically elliptic to subrhombic in cross section. Pleurogram bordered with wrinkles. Lens a light-colored mound.
northern Chaco woods, clay soils
Prosopis rojasiana is a spiny, nearly leafless, tall shrub or tree, 2–6 m tall. The pod breaks up into one-seeded segments.