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28 June 2016 Taxonomic Revision of Geranium sect. Trilopha (Geraniaceae)
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Abstract

Geranium sect. Trilopha (Geraniaceae) consists of seven species: G. biuncinatum, G. brevipes, G. favosum, G. mascatense, G. ocellatum, G. trilophum, and G. yemense. The highest diversity of the group is located in Iran, the Arabian Peninsula, and adjacent regions of northeast Africa with five endemic species. One species occurs in the Himalayas and another is widespread in the mountains of tropical Africa. In contrast with current literature, we consider G. yemense to be a separate species from G. trilophum, and G. brevipes also to be separate from G. ocellatum. Micromorphological features of indumentum, pollen, mericarps and seeds were investigated by SEM. Two features are present in all species of the section and give strong support to this group: a) pollen with Erodium-type exine ornamentation (first reported here), and b) fruit with twisted rostrum. A new key is provided, as well as new and detailed descriptions. Each species is illustrated and mapped and five lectotypes are designated.

© Copyright 2016 by the American Society of Plant Taxonomists
Carlos Aedo, Patricia Barberá, and Antoni Buira "Taxonomic Revision of Geranium sect. Trilopha (Geraniaceae)," Systematic Botany 41(2), (28 June 2016). https://doi.org/10.1600/036364416X691812
Published: 28 June 2016
JOURNAL ARTICLE
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