Banisteriopsis megaptera B.Gates
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Authority
Gates, Bronwen. 1982. Banisteriopsis, Diplopterys (Malpighiaceae). Fl. Neotrop. Monogr. 30: 1-238. (Published by NYBG Press)
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Family
Malpighiaceae
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Scientific Name
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Type
Type. W. R. Anderson 11734, Brazil, Minas Gerais, 43 km by road S of Itaobim on BR-116, fl fr (holotype, MBM; isotype, MICH).
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Synonyms
Banisteria ovata Nied., Banisteria ovata var. subleiocarpa Nied.
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Description
Latin Diagnosis - Frutex usque 3 m altus, rami saepe volubiles ad apicem, brunnei, lenticellis pallidis. Stipulae minutae, triangulares, jugo interpetiolari junctae. Folia petiolo (7-) 10-20 mm longo, sparsim sericeo vel glabrato, ad apicem biglanduloso, lamina 4.5-11.7 cm longa, 3.1-6.9 cm lata, ovata orbicularive, basi obtusa truncatave, apice obtusa apiculatave, margine revoluta et glandibus minutis instructa, pari prope costam ad basim aucto, adaxialiter glabrata, abaxialiter sparsim apresso-sericea, pilis trabecula recta 0.2-0.5 mm longa, reticulo prominenti adaxialiter, venis prominentibus abaxialiter. Inflorescentia axillaris vel terminans, paniculata, usque 20 cm longa, tomento-sericea, demum glabrata, ramis lateralibus usque 20 flores gerentibus; bracteis bracteolisque 0.5-0.8 mm longis, triangularibus, glabris, involucratis, persistentibus; pedicello sessili vel pedunculo usque 2 mm longo, 7-12 mm longo, 0.5-0.8 mm diametro, in fructu crassiore, brunneo-sericeo. Sepala 5, 1.5-2.5 mm longa, 0.9-1.0 mm lata, oblonga, apice rotundata, abaxialiter sparsim appresso-sericea, adaxialiter glabra, 4 lateralia 2 glandes 1.5-2.5 mm longa et 0.8-1.4 mm lata gerentia et 1.0-1.5 mm superantia. Petala 5, vitellina, glabra, margine integro, 4 lateralia inter sepala patentia, ungue 0.8-1.2 mm longo, limbo 5.0-6.0 mm longo, 3.0-4.5 mm lato, elliptico, parum concavo, abaxialiter parum carinato, petalum posticum ungue erecto usque 1.4 mm longo, quam ceteris parum crassiore et longiore, limbo 4.5-5.5 mm longo 3.0 mm lato, obovata, basi utrinque 1-2 dentibus glandulatis munito. Stamina filamentis subaequalibus, illis sepalis oppositis quam petalis oppositis parum longioribus, 1.4-2.2 mm longis, basi connatis; antherae reflexae, loculis 1.0-1.2 mm longis, pilosis, connec-tivis 0.8-1.0 mm longis, 0.5-0.7 mm latis, 0.3-0.4 mm profundis, oblongis, illis sepalis oppositis quam illis petalis oppositis parum majoribus, eglandulosis. Ovarium 1.0-1.4 mm altum, candido-sericeum, styli aequales, 1.6-1.8 mm longi, cras-si, paralleli vel ad apicem divergentes, stigmata truncata. Fructus ex 3 samaris (vel abortu 1-2) constans; samara carpophoro usque 1 mm longo, 2 mm lato, nuce ovoidea, 9-11 mm alta, 7-9 mm longa, laevi vel rugulosa, dense appresso-sericea, pilis trabecula flexuosa usque 0.5 mm longa, ala (25-)30-53 mm longa, (11-) 14-23 mm lata, dense appresso-sericea, basi marginis Superioris appendicula 6-9 mm longa et 1-2 mm alta munita.
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Discussion
Collected in flower in January, March, May, October and December, and in fruit in March and May.
This species is distinguished from Banisteriopsis cornifolia by its long petioles, inflorescence with many-flowered side branches, and large fruit; it can also be distinguished from B. ferruginea by its long petioles and large fruit, and in addition, by its leaf shape and persistent leaf pubescence. Two fruits of Glaziou 12492, one on the Brussels sheet and one visible on the photo of the Berlin specimen, have a lateral winglet on the fruit up to eight mm long and two mm high. No other specimens exhibit lateral winglets, and since the presence or absence of lateral winglets seems to be a variable character throughout the B. cornifolia group, I am not according it taxonomic significance.The name refers to the size of the fruit wing, which is large for the subgenus Banisteriopsis. -
Distribution
Apparently in salt-rich soils in eastern Brazil.
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