Phyllopentas flava (Rubiaceae), a New Morphologically Heterodistylous and Functionally Dioecious Species from Madagascar

Tefy H. Andriamihajarivo; Sylvain G. Razafimandimbison; Jesper Kårehed

doi:10.1600/036364411X605029

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1 October 2011 Phyllopentas flava (Rubiaceae), a New Morphologically Heterodistylous and Functionally Dioecious Species from Madagascar

Tefy H. Andriamihajarivo, Sylvain G. Razafimandimbison, Jesper Kårehed

Author Affiliations +

Tefy H. Andriamihajarivo,¹ Sylvain G. Razafimandimbison,^2,* Jesper Kårehed³

¹1Missouri Botanical Garden, Madagascar Program, P. O. Box 3391 Antananarivo 101, Madagascar.
²2Bergius Foundation, Royal Swedish Academy of Sciences, Department of Botany, Stockholm University,
³3Uppsala University Botanic Gardens, Uppsala University SE-75236, Uppsala, Sweden.

^*Author for correspondence (sylvain@bergianska.se)

Systematic Botany, 36(4):1024-1027 (2011). https://doi.org/10.1600/036364411X605029

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Abstract

A new species of the Afro-Malagasy genus Phyllopentas Kårehed & B. Bremer, Phyllopentas flava Razafim., T. Andriam. et Kårehed, is described and illustrated. This plant is restricted to the Itremo region in southeastern Madagascar and is distinct morphologically from the other species of the genus by its pubescent, narrowly ovate to narrowly elliptic leaves, grey-whitish and thickly hairy midribs and secondary veins on the lower surfaces of leaves, and functionally dioecious and heterodistylous flowers. Summaries of distribution, phenology, habitat, and ecology are given and a conservation assessment is also provided.

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Tefy H. Andriamihajarivo, Sylvain G. Razafimandimbison, and Jesper Kårehed "Phyllopentas flava (Rubiaceae), a New Morphologically Heterodistylous and Functionally Dioecious Species from Madagascar," Systematic Botany 36(4), 1024-1027, (1 October 2011). https://doi.org/10.1600/036364411X605029

Published: 1 October 2011

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Systematic Botany
Vol. 36 • No. 4
October 2011

KEYWORDS

functional dioecy

heterodistyly Knoxieae

Phyllopentas

Rubiaceae

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Tefy H. Andriamihajarivo, Sylvain G. Razafimandimbison, Jesper Kårehed "Phyllopentas flava (Rubiaceae), a New Morphologically Heterodistylous and Functionally Dioecious Species from Madagascar," Systematic Botany, 36(4), 1024-1027, (1 October 2011)

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