Mimosa depauperata Benth.
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Authors
Rupert C. Barneby
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Authority
Barneby, Rupert C. 1991. Sensitivae Censitae. A description of the genus Mimosa Linnaeus (Mimosaceae) in the New World. Mem. New York Bot. Gard. 65: 1-835.
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Family
Mimosaceae
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Scientific Name
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Type
53. Mimosa depauperata Bentham, Pl. hartweg. 13. 1839. —"prope Actopan [Hidalgo, Mexico]."—Holotypus, G. J. Graham 187, May 1830, K!; isotypus (fragm.), GH!
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Description
Species Description - Stiffly stoutly branched microphyllous shrubs attaining 5-12 dm but often broader than tall, armed at all or most nodes with one stout, ascending or horizontal, gently recurved aculeus 1.5-4.5 mm, the old defoliate branches fuscous, the homotinous long-shoots barren, the peduncles fasciculate with coeval lvs on scaly brachyblasts, the young stems, folige and especially the pod finely silky-puberulent. Stipules subulate or setiform, those of brachyblasts densely imbricate persistent. Leaf-formula i/2-3, the petiole 3-14 mm, bisulcate dorsally, openly 1-sulcate ventrally, espiculate, the rachis of pinnae 1.5-3.5 (-5) mm, the lfts elliptic or oblong-elliptic, the distal pair 1.8—4.2 mm, all nerveless or faintly 2-nerved dorsally. Peduncles 2-7 mm; capitula without filaments ±5 mm diam., the fl-buds puberulent above middle; pedicels 0.2-0.5 mm; flowers 4-merous 4-androus; calyx 0.6-0.7 mm, minutely denticulate, the rim tomentulose or fimbriolate; corolla 2.4-2.9 mm, the erect lobes shorter than tube; filaments pink, monadelphous at very base through ±0.2 mm, exserted 4 mm. Pods ±1-5 per capitulum, contracted at base into a stipe or neck 2-4.5 mm, the undulately linear, downwardly curved body ±20-40 x 5 mm, 4- 7(-8)-seeded, puberulent overall, the constricted cordlike replum armed along the convex suture with broad-based, sometimes basally confluent, erect aculei 1.5-4 mm, the papery valves bullately distended over each seed, breaking up into free-falling articles 4.5-6 mm long.
Distribution and Ecology - In matorral, near 2000 m, local around the s.- e. edge of the Mexican Plateau, on the upper forks of río Moctezuma, in Hidalgo and Querétaro, Mexico.-Fl. (III-)VI-VII.
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Discussion
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Distribution
Mexico North America| Querétaro Mexico North America| Hidalgo Mexico North America|