Marcetia wilburiana is described and illustrated from the southwestern region of the Chapada Diamantina in Bahia, Brazil, where it appears to be a rare and local species of campo rupestre. Its affinities appear to be with M. ericoides and M. shepherdii, both of which have a wiry subshrubby habit; small, coriaceous, glabrous leaves that are appressed and imbricate on uppermost cauline internodes; and solitary flowers. It differs from both species in having abaxial foliar surfaces that are longitudinally grooved between the callose-thickened margins and midvein, calyx lobes and hypanthia that are moderately to copiously beset with spreading gland-tipped trichomes 0.5–1.0 mm long, and petals that terminate in a persistent glandular trichome. The new species and presumed relatives are mapped and a key is provided to species in the informal ericoid group.
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11 March 2024
A New Marcetia (Melastomataceae) from Chapada Diamantina, Bahia, Brazil
Frank Almeda,
Ricardo Pacifico,
Karina Fidanza
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Rhodora
Vol. 124 • No. 998-9
April–September, 2022
Vol. 124 • No. 998-9
April–September, 2022
Cadeia do Espinhaço
campo rupestre
Endemism
Marcetieae
restingas