Mimosa setosa subsp. setosa var. pseudomelas
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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
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
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Synonyms
Mimosa melanocarpa Benth.
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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.
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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.
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Distribution
Brazil South America| São Paulo Brazil South America|