Mimosa setosa subsp. setosa var. pseudomelas

  • 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 setosa subsp. setosa var. pseudomelas

  • Type

    221/IIb. Mimosa setosa Bentham subsp. setosa var. pseudomelas Barneby, var. nov., a var. setosa legumine basi in stipitem 3-8 mm longum abrupte contracto spiculisque interpinnalibus nullis diversa, cum M. melanocarpa a cl. Bentham, olim commutata, ab hac

  • Synonyms

    Mimosa melanocarpa Benth.

  • Description

    Variety Description - Everything of subsp. setosa except that the lf-stks lack interpinnal spicules and the pod is stipitate, thus resembling M. melanocarpa, but with the short and broad 1 -seeded articles of M. setosa sensu lato and consequently transverse, not basipetal seeds.

    Distribution and Ecology - In unrecorded habitat, but to be expected in cerrado, perhaps in seasonally moist places, apparently local in n.-centr. S. Paulo, Brazil, in lat. 20°-21°S (Franca; Batatais; Araraquara).—Fl.XII-V(-?). Map 28.

  • Discussion

    I have segregated this variety under the epithet pseudomelas because it was confused by Bentham with M. melanocarpa. The type specimen was first identified by Bentham as M. setosa, but later transferred to M. melanocarpa, perhaps because of its stipitate pods. Theoretically, var. pseudomelas might be interpreted as a link connecting M. setosa with M. melanocarpa, but it is allopatric to both. I surmise that it represents an independent mutation derived directly from subsp. setosa.

     

  • Distribution

    Brazil South America| São Paulo Brazil South America|