Mimosa affinis B.L.Rob.

  • 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 affinis B.L.Rob.

  • Synonyms

    Mimosa mazatlana M.E.Jones

  • Description

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    Species Description - Diffuse monocarpic herbs, armed at (and randomly between) nodes, the stems hispid with erect setae to ±1.5-2 mm, the lfts glabrous above, beneath glabrous, minutely puberulent or a few proximal ones also strigose. Stipules 5-7-nerved. Leaf-formula i/8-12, the lf-stks 1.5-3 cm, espiculate, the pinna-rachises 1.5-3.5 cm; lfts oblong ±8-12 x 2—4 mm. Capitula less than 20-fld, at anthesis ±3 mm diam.; bracts linear, setose-ciliate, persistent; flowers with minute glabrous calyces; corolla ±2 mm; filaments exserted ±3 mm. Pods to 10 per capitulum, subsessile, in profile narrowly oblong 10-16 x 4.5-5 mm, abruptly cuspidate, the slender replum hispidulous with weak recurved setulae less than 1 mm, the valves either glabrous or puberulent.

    Distribution and Ecology - In open grassy places and disturbed brush-woodland, from sea-level to ±950 m in the oak belt, scattered around the Pacific lowlands and in the Balsas depression of Mexico from Sinaloa to Guerrero e. to México and Morelos, s.-e. to Oaxaca; Belize (fide R. Grether).—Fl. VII-I.

  • Discussion

    This species has been mistaken (as by Isely, 1971: 420) for seedling, conjugate-pinnate M. pudica, but is instantly recognizable by the tiny narrow capitula of ascending flowers.

  • Distribution

    Belize Central America| Mexico North America| Morelos Mexico North America| Oaxaca Mexico North America| Sinaloa Mexico North America| Guerrero Mexico North America|