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1 June 2018 A new Gravesia (Melastomataceae, Sonerileae) from the Bemangidy-Ivohibe rainforest of southeastern Madagascar
Frank Almeda, Heritiana Ranarivelo
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Abstract

Almeda, F. & H. Ranarivelo (2018). A new Gravesia (Melastomataceae, Sonerileae) from the Bemangidy-Ivohibe rainforest of southeastern Madagascar. Candollea 73: 1–5. In English, English and French abstracts. DOI:  http://dx.doi.org/10.15553/c2018v731a1

Gravesia parvula Almeda & Ranarivelo (Melastomataceae, Sonerileae), a new species from the Bemangidy-Ivohibe forest of southeastern Madagascar, is described, illustrated, mapped, and compared with superficially similar Malagasy species. In addition to its dwarf rosette-like habit, it is distinguished by the semi-succulent obovate to oblanceolate 1-nerved leaf blades with entire distally repand margins, indumentum of minute dark brown gland-like trichomes that are rounded to shallowly bilobed at the apex, stamens with external (antesepalous) and internal (antepetalous) whorls somewhat unequal in size in each flower, obovoid to oblong anther thecae with cleft-like ventrally inclined apical pores, and capitate stigma. A conservation assessment of “Endangered” is recommended for this species based on IUCN Red List Categories and Criteria.

© CONSERVATOIRE ET JARDIN BOTANIQUES DE GENÈVE 2018
Frank Almeda and Heritiana Ranarivelo "A new Gravesia (Melastomataceae, Sonerileae) from the Bemangidy-Ivohibe rainforest of southeastern Madagascar," Candollea 73(1), 1-5, (1 June 2018). https://doi.org/10.15553/c2018v731a1
Published: 1 June 2018
JOURNAL ARTICLE
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KEYWORDS
conservation
Gravesia
Madagascar
Melastomataceae
new species
taxonomy
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