Mimosa myriadenia var. myriadenia

  • Title

    Mimosa myriadenia var. myriadenia

  • Authors

    Rupert C. Barneby

  • Scientific Name

    Mimosa myriadenia (Benth.) Benth. var. myriadenia

  • Description

    1b. Mimosa myriadenia (Bentham) Bentham var. myriadenia. M. myriadenia Bentham, 1875, l.c., sens. str., based on Entada myriadenia Bentham, J. Bot. (Hooker) 2: 133. 1840.—"Rio Negro, Schomburgk, n. 917."—Holotypus, K (hb. Benth.)!

    Acacia paniculiflora Steudel, Flora 26: 760. 1843.— "[in Innern von Surinam, Hostmann & Kappler] nr. 151."—Holotypus not seen; probable isotypi, numbered 752,K! MO!—Equated with M. myriadenia by Bentham, 1875: 408.

    Mimosa myriadenia sensu Bentham, 1876: 344 ( myriadena"), max. ex parte, exclus. Spruce 3158 quae = var. dispersa, sequ.; Ducke, 1949: 55.

    Leafstalks of longer lvs 7-14.5 cm, the petiole 1.3-3 cm, the longer interpinnal segments 6-10(- 12) mm; pinnae of longer lvs 9-16(-18)-jug., the rachis of longer ones 3.5-7 cm, the interfoliolar segments (1.4—) 1.5—3.5(—4) mm; lfts of longer pinnae 16-26-jug., those near mid-rachis broadly or narrowly oblong from variably inequilateral base, obliquely mucronulate at apex, the longer ones 5-9.5 x 1.5-3 mm, 1.8-3.2 times as long as wide, (2-)3-4(-5)-nerved dorsally, the inner posterior nerve usually brochidodrome beyond mid-blade, the intervenium usually densely lepidote overall, either glabrous or pilosulous, the scales rarely few and far between.

    Climbing into and festooning riparian forest and forming tangled masses in forest openings, in capoeira, in pasture thickets and along roadsides, mostly in lowland, non-inundated forest but attaining 490 m in Guyana, common and locally abundant in the three Guianas, adj. Venezuela, and lower Amazon basin in Amapá and Pará, Brazil, in Venezuela w. and n.-w. to the sources of río Orinoco in T. F. Amazonas and to the Maracaibo basin in Zulia, in Brazil w. to Roraima and along, but scarcely s. of, the Amazon itself to ±66°W; apparently disjunct at 450 m at foot of Cordillera Oriental in Meta, Colombia (Villavicencio; Cord. Macarena), and in lower Magdalena valley; and remotely so in prov. Heredia and San José, Costa Rica.—FI. VIII-II, and sporadically throughout the year.—Raspa (Venezuela); hiri-hiri-balli (Guyana). Map 1.