Banisteriopsis rondoniensis B.Gates

  • Authority

    Gates, Bronwen. 1982. Banisteriopsis, Diplopterys (Malpighiaceae). Fl. Neotrop. Monogr. 30: 1-238. (Published by NYBG Press)

  • Family

    Malpighiaceae

  • Scientific Name

    Banisteriopsis rondoniensis B.Gates

  • Type

    Type. M. R. Cordeiro 903, Brazil, Rondônia, Guajará-Mirim, Subbase Projecto RADAM, Estrada do Palheta Fronteira Brasil-Bolivia, Ponto 23, SC-20-VB, fr (holotype, IAN; isotype, MICH).

  • Description

    Latin Diagnosis - Frutex volubilis vel liana usque 10 m, rami juniores dense luteo-tomento-seri-cei, rami vetustiores demum glabrati, griseo-brunnei. Stipulae minutae. Folia subsessilia, petiolo usque 2 mm longo, tomentoso, eglanduloso, lamina 4.6-7.3 cm longa, 2.7-5.4 cm lata, in inflorescentia parviore, elliptica vel late elliptica vel rotundata, basi cordata, apice brevi-acuminata, margine plana et glandulis instructa praesertim in acumine, adaxialiter sparsim aureo-tomentosa vel glabrata, pilis flexuosis, pagina polita, abaxialiter dense tomentosa, venis venulisque pro-minulis adaxialiter, venis lateralibus abaxialiter prominentibus. Inflorescentia axillaris, in racemis 6- usque 12-floriferis paribus oppositis composita, aureo-tomento-sericea; bracteis bracteolisque 1.0-2.5 mm longis, anguste ovatis, apice acutis, carinatis, involucratis, persistentibus, sparsim vel dense tomentosis abaxialiter; pedicellis sessilibus, 14-22 mm longis, 0.5-0.6 mm diametro, aureo-tomento-sericeis. Sepala 2.0-2.2 mm longa, 1.5-2.0 mm lata, abaxialiter aureosericea, adaxialiter glabra, omnia biglandulosa vel interdum sepalum anticum uniglandulosum, usque 1.0 mm superantia glandes, glandibus 1.8-2.3 mm longis et 0.8-1.2 mm latis. Petala lutea, extus sericea, fimbriata, 4 lateralia inter sepala patentia, ungue 1.5-2.0 mm longo, limbo 8.5-9.5 mm longo, 6.5-8.0 mm lato, rotundata, cochleato vel concavo, 2 anterioribus quam 2 posterioribus parum majoribus et concavioribus, petalum posticum ungue erecto usque 2.5 mm longo et 0.8 mm lato ad apicem, limbo usque 7.5 mm longo et 5.5 mm lato, elliptico, fimbriis basalibus interdum glandulosis. Stamina filamentis crassis, erectis, illis sepalis oppositis 2.4-2.8 mm longis, subaequalibus, illis petalis oppositis 1.4-2.4 mm longis, subaequalibus, illis petalis postero-lateralibus oppositis quam ceteris majoribus; antherae reflexae, loculis 1.3-1.6 mm longis, pilosis, connectivis ad apicem papillosis, illis sepalis oppositis 1.1-1.2 mm longis, 0.5-0.6 mm latis, 0.40.6 mm profundis, obovatis, illis petalis oppositis 1.0 mm longis, 0.3-0.4 mm latis, 0.3-0.4 mm profundis, auguste oblongis. Ovarium 1.5 mm altum, dense sericeum; styli recti parallelique vel divergentes apicem versus, stylus anticus 2.0-2.6 mm longus, usque 0.2 mm latus, postici 1.6-2.0 mm longi usque 0.2 mm lati; stigmata capitata. Fructus ex 3 samaris (vel abortu 1-2) constans, samara carpophoro usque 1.5 mm longo et 0.2-0.4 mm lato, nuce 4.0-5.0 mm alta, 3.0-3.5 mm longa, globosa, caperata, dense aureo-appresso-sericea, ala 14-18 mm longa, 6-9 mm lata, sparsim aureo-appresso-sericea, pilis sessilibus, trabecula 0.3-0.4 mm longa, appendicula in margine superiore basi 1-2 mm alta et 3-4 mm longa secus basim.

  • Discussion

    Collected in flower in January and April and in fruit in April.

    This species is distinguished by its tomentose leaf pubescence and by its small fruits and flowers borne in axillary racemes of 6-12 flowers, not “umbels” of 46 flowers. Banisteriopsis cachimbensis in this group also has tomentose leaf pubescence, but its leaves are petiolate and not subsessile. Banisteriopsis rondonien-sis is unusual in that the anterior sepal is usually glandular.

  • Distribution

    Known only from Rondônia in Brazil.

    Brazil South America| Rondônia Brazil South America|