Prosopis campestris Griseb.
Family Fabaceae, Subfamily Mimosoideae
NOTE: Only two seeds of Prosopis campestris were available for examination. Therefore, the description and images in this fact sheet may not be representative of this species’ seeds.
Pods linear, compressed, nearly straight to subfalcate, 5–8 cm long, 7–10 mm wide, ca. 3 mm thick. Short-stipitate, margins undulate. Yellowish-brown, smooth, pubescent when immature, with prominent longitudinal striations; seed chambers 6–11, with transverse linear constrictions between them. Endocarp segments oblique-subquadrate, boney, closed, 6–8 mm long, 5–6 mm wide, 2–3 mm thick; mesocarp thin, dry. Seeds oriented longitudinally.
Seeds elliptic to asymmetrically elliptic or subrhombic in outline, 2.7–4.5 mm long, 1.7–3.5 mm wide, 0.6–2 mm thick, with an umbo, +/– elliptic in cross section. Pleurogram average in size or quite small and narrow. Lens a mound.
Prosopis elata (Burkart) Burkart (Pods are similar.)
Prosopis campestris is a spiny, dwarf shrub, 10–50 cm tall. It is quite localized and rare, yet in the Rio Tercero region of Argentina it is considered a nuisance on land intended for agriculture.