Mimosa adenocarpa 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
137. Mimosa adenocarpa Bentham, J. Bot. (Hooker) 4: 399. 1842.—"Brazil, Pohl, Sello, Claussen, Langsdorff."—Lectotypus, Pohl 731 = d. 1417, collected in XI-XII. 1818 near Paracatú in w. Minas Gerais, K! isotypi, NY! W!; syntypi, Sello s.n., +B = F Neg. 12
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Synonyms
Mimosa adenocarpa var. genuina f. aculeata
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Description
Species Description - Weak, diffusely ascending viscid and prickly shrubs and subshrubs to 2-3 m, except for glabrous faces of lfts ± densely charged throughout with slender capitate-glandular setulae to 0.4-1.4 mm mixed or not with minute gray villi, the stems and commonly some lf-stks armed with erect or more often sub-recurved, vertically dilated stramineous aculei to 2.5-4 mm, the many small capitula either largely axillary or forming an exserted, hysteranthously foliate pseudoraceme terminal to homotinous branches. Stipules narrowly lanceolate or subsetiform (2-)2.5-4.5 x 0.3-0.7 mm, strongly 1-nerved dorsally, persistent. Leaf-stalks of major cauline lvs (3-)4.5-11 cm, the petiole 5-13 x 0.3-0.7 mm, the longer interpinnal segments 5-12 mm, the obscure or narrow ventral groove interrupted between pinna-pairs by a spicule 0.4-1.3 mm; pinnae of larger lvs 5-9-jug., decrescent proximally, the rachis of longer ones 10-20 mm, their longer interfoliolar segments 0.5-1.1 mm; lfts of longer pinnae 13-22-jug., the first pair 0.5-1.1 mm distant from subulate paraphyllidia, the thin-textured blades in outline linear-oblong obtuse, the longer ones 2.5-4.8 x 0.4-0.8 mm, their margin either thinly or remotely villosulous or glandular-fimbriolate, the ventral face nerveless, the slender centric midrib faintly raised beneath. Peduncles solitary or 2-3 per node, 1-3 cm, at anthesis very slender, a little thickened in fruit; capitula relatively few-fld, without filaments 4-7.5 mm diam., prior to anthesis moriform and usually a little longer than diam.; bracts subhyaline oblanceolate 0.5-1 x 0.2-0.45 mm; flowers 4-merous 8-androus, all bisexual or some lower ones often staminate; calyx hyaline campanulate 0.2-0.5 mm, glabrous externally, the subtruncate rim naked or with a few minute hairs or gland-tipped setulae to 0.25 mm; corolla vase-shaped 2.4-3 mm, the tube glabrous externally, the ovate purplish lobes ±0.7-0.9 mm, dorsally with scattered or moderately crowded gland-tipped setulae; filaments pink, free to within 0.3 mm of base, the longer ones exserted 5-6 mm. Pods (Lewis, 1987, fig. 8X) usually several per capitulum, stipitate, the stipe 1-2 mm, the undulately linear body in profile 13-24 x 2.4-3 mm, contracted at apex into a subulate beaklike cusp 1.5-3 mm, the replum 0.2-0.4 mm wide, shallowly constricted between (2-)3-7 seeds, the papery greenish-stramineous valves bullately elevated over each seed, like the unarmed or at times randomly aculeolate replum viscid-hispidulous overall with slender capitate-glandular setulae often mixed with fine villi, when ripe breaking up into elliptic articles a little longer than wide; seeds basipetally descending, plumply ellipsoid 2-2.4 x 1.4-1.7 mm, the brown testa dull, girdled by a fuscous line.
Distribution and Ecology - On rocky creek banks and in open campo on red sandy soils, becoming weedy in disturbed cerrado and on roadsides, 700-1200 m, apparently local in centr. Bahia (Andaraí; Lençois), centr. and s.-e. Goiás (with Distrito Federal) and closely adj. Minas Gerais, and (formerly) in centr. Minas Gerais (Belo Horizonte; Lagôa Santa); disjunct in the Pantanal of Mato Grosso do Sul.— Fl. XII-V. Map 23.
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Discussion
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Distribution
Brazil South America| Mato Grosso do Sul Brazil South America| Bahia Brazil South America| Minas Gerais Brazil South America|