Mimosa quadrivalvis var. distachya (Moc. & Sessé ex DC.) Barneby

  • Authors

    Rupert C. Barneby

  • 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.

  • Family

    Mimosaceae

  • Scientific Name

    Mimosa quadrivalvis var. distachya (Moc. & Sessé ex DC.) Barneby

  • Type

    190b. Mimosa quadrivalvis Linnaeus var. distachya (DeCandolle) Barneby, stat. nov. Schrankia distachya DeCandolle, Prodr. 2:443. 1825.—"(fl. mex. ic. ined.) ... in Nova Hispania."—Holotypus, sheet 6331.560 in the icones of Sessé & Mociño at the Hunt Libra

  • Synonyms

    Schrankia distachya DC., Leptoglottis distachya (Moc. & Sessé ex DC.) Britton & Rose, Leptoglottis palmeri Britton & Rose, Schrankia palmeri (Britton & Rose) Standl.

  • Description

    Variety Description - Stems coarsely 4-5-angulate; leaf-formula iii— v/16-23; longer lf-stks (6-)8-21 cm, the petiole 4.5-11 cm, mostly longer than or equal to the rachis; rachis of longer pinnae 3-6 cm; longer lfts 6.5-13 x 1.8—3(—3.5) mm; longer peduncles (1 —) 1.5—3 cm; capitula without filaments 6.5-9.5 mm diam.; pods mostly 70-100 x ±3 mm, the valves ±1.5 mm wide, the replum 1.5-2 times wider, coarsely recurved-prickly with discrete aculei.

    Distribution and Ecology - In open grassy or weedy, sometimes wet places, from the coastal plain to 1500 m, scattered through tropical w. Mexico from s. Sinaloa to Oaxaca, inland to centr. Jalisco and s.-w. Mexico.—Fl. VII-X, sporadically later.

  • Discussion

    The var. distachya is very close to var. quadrivalvis, but is commonly a coarser plant, with larger leaves, a higher leaf-formula, and slightly plumper capitula and longer pods. Its inland forms (including type of L. palmeri) usually have narrower and more glabrous leaflets than those of the coastal lowlands, and at anthesis are difficult to distinguish from var. jaliscensis. The present definition of var. distachya follows that of McVaugh (1987: 245).

  • Distribution

    Mexico North America| Jalisco Mexico North America| Oaxaca Mexico North America| Sinaloa Mexico North America|