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| Bonamia minima A.L.C.Moreira & Faria, in Moreira, Faria, Cunha Neto, Mata et Zanatta, 2025. |
Abstract
A new species of Convolvulaceae, Bonamia minima A.L.C. Moreira & Faria, is described and illustrated based on a collection made in 2012 from a region of high diversity in the Central Plateau of Brazil, in campo rupestre. The new species is most similar to B. austinii A.L.C.Moreira & Sim.-Bianch., the only congener with which it shares the combination of sericeous indumentum and bifurcate trichomes on the leaves. It can be distinguished from this species mainly by characteristics of the gynoecium, presenting a completely glabrous ovary. Details of its habitat, distribution, phenology, conservation status, and micromorphological aspects of the leaf and pollen are provided, along with a comparison to the most similar species.
Keywords: Campo rupestre, Cerrado, Neotropical biodiversity, Savannah, subshrub, Taxonomy
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| Bonamia minima A.L.C.Moreira & Faria sp. nov.: a. Habit; b. Leaf-adaxial surface; b1. Leaf-abaxial surface; c. Flower-lateral view; d. Sepals; e. Corolla with stamen, longitudinal section; f. Stamen; g. Pollen grain; h. Gynoecium; i. Stigma (drawn from the holotype by MC) |
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| Bonamia minima A.L.C.Moreira & Faria sp. nov.: a. Habit; b. Flower-lateral view; b1. Sepals; c. Flower-frontal view; d. Stamen; e. Polar view of pollen grain (SEM); f. Style; f1. Stigma under scanning electron microscopy; g. Branch (Photos by H. Moreira. (A, B, C e G; Designed by JV). |
Bonamia minima A.L.C. Moreira & Faria, sp. nov.
Closely related to B. austinii A.L.C. Moreira &
Sim.-Bianch. (Moreira et al. 2018) (Fig. 2, 3) by
presenting short elliptic petiolate leaf and axillary
inflorescence with white corolla but differing by
its glabrous ovary, style with equal size and stigma
fully globose. Bonamia austinii has an ovary with a
hairy apex, styles of different sizes and globose to
reniform stigmas.
Etymology: The specific epithet minima, derived from the Latin minimus, refers to the small size of the plant compared to other species of the genus. Its total size does not exceed 20 cm in height, with its delicate leaves measuring approximately 2.2 cm.
Moreira A.L.C., Faria J.E.Q., Cunha Neto I.L., Mata L.R. and M.R.V. Zanatta. 2025. Bonamia minima (Convolvulaceae): A New Species from Brazil, with notes on leaf anatomy and pollen morphology. Rheedea. 35(2):51-61. https://rheedea.in/journal/ftH8cFXW
DOI: 10.22244/rheedea.2025.35.02.01 [30-Jun-2025]
