Mimosa arenosa ( Willdenow 1806: 1054 ) Poiret (1810: 66)
publication ID |
https://doi.org/ 10.11646/phytotaxa.555.1.2 |
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https://doi.org/10.5281/zenodo.6886119 |
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https://treatment.plazi.org/id/038E87C1-995C-5F24-04DF-E92CFC257275 |
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Plazi |
scientific name |
Mimosa arenosa ( Willdenow 1806: 1054 ) Poiret (1810: 66) |
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20. Mimosa arenosa ( Willdenow 1806: 1054) Poiret (1810: 66) View in CoL
Trees, branches tomentose, aculeate. Nectary absent. Stipules lateral, acicular. Leaves bipinnate, paripinnate, 14– 18–foliolate, leaflets opposite, oblong, venation actinodromous, translucid punctuation absent. Inflorescence spike, axillary. Flowers sessile, actinomorphic, diplostemonous; calyx gamosepalous, sepals 4, corolla gamopetalous, tubular, whitish, petals 4; androecium dialystaminous, homodinamous, anthers longitudinal; ovary superior, stipitate, pluriovulate. Fruit craspedium, stipitate, linear, plane, margin straight, epicarp glabrous, brown. Seeds not observed.
Examined material:— BRAZIL. Paraíba: Maturéia, Pico do Jabre , 800 m elev., 13 May 2019, fl., Aureliana Gomes 3012 ( HACAM) .
Distribution and ecology:— The species is distributed in Colombia, Venezuela, Mexico and Brazil, where it is distributed from Ceará to Minas Gerais, exclusively associated with the Caatinga domain ( Dourado, 2013; Flora do Brasil 2020). Souza et al. (2021), found this species in Sertão region at Paraíba state.
Phenology:— Registered with flowers in May.
Taxonomic discussion:— Mimosa arenosa can be recognized, mainly, by the arboreous habit, tomentose aculateate branches, inflorescence in spike and by the flat craspedium fruits. Spiciform inflorescence is a feature shares with the other Mimosa species recorded in the study area, with Mimosa arenosa and M. tenuiflora their white flowers vs. pink flowers on Mimosa invisa and M. verrucosa . Mimosa arenosa presents twisted aculeous and flat straight craspedium vs. straighted aculeous and flat corrugate craspedium in M. tenuiflora .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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