Prosopis denudans Benth.

Family: Fabaceae,  Subfamily: Mimosoideae

NOTE: Only nine seeds of Prosopis denudans were available for examination. Therefore, the description and images in this fact sheet may not be representative of this species’ seeds.

Description

Pods linear-oblong, falcate to annular, 2-8(11) cm long, 7-14 mm wide, 5-6 mm thick. Short-stipitate, apex rounded, mucronate, or acute, margins straight. Glabrous or puberulous, smooth, reddish-black, glossy when ripe, often cracking with age. Seed chambers sometimes visible, 10-20. Endocarp segments subquadrate, boney, closed, 6-8 mm long and wide, 4-6 mm thick; mesocarp pulpy-fibrous. Seeds oriented longitudinally.

Seeds obovate to asymmetrically obovate or elliptic in outline, 4-7 mm long, 2.5-4 mm wide, 1.75-3 mm thick, umbo absent, elliptic in cross section. Lens convex, recessed.

Identification remarks

Pods are fairly distinctive in the genus.

Similar species

Prosopis denudans var. patagonica (Speg.) Burkart (pod)

Prosopis denudans var. stenocarpa Burkart (pod). [No image available.] Pods falcate to annular, 5 mm in diameter, constricted between seed chambers, endocarp segments elongate, oblong.

Prosopis ruizlealii Burkart

Distribution

Argentina.

Habitat

Semidesert shrub steppe with very cold winters.

General information

Prosopis denudans is a spiny shrub, 1-2 m tall. It is an extreme xerophyte, and is also the most frost hardy in the genus, growing at its southernmost limits. The wood is used for fuel. Seeds are dispersed by livestock that eat the pods.

For more information about the genus Prosopis, see the Prosopis fact sheet.

Seeds (white coating on seeds may be residue of fumigation)

Lens and hilum of seed

Pods

Pod

Pod

A, Pod; B, seed; C, longitudinal section of seed showing embryo; D, transection of seed

drawing by Lynda E. Chandler

Pods

Pods