A critical comparison of many characters suggests that the Rubiaceae tribe Anthospermeae is closely allied to the tribe Paederieae. The delimitation of the tribe Anthospermeae from other tribes is redefined as to include only wind‐pollinated genera, and characters of fruit structure, pollination biology and distribution patterns support the subdivision of the tribe into the three subtribes: Anthosperminae, Operculariinae and Coprosminae.
All insect‐pollinated genera previously placed in the Anthospermeae are transferred to the Paederieae. It is shown that the genus Neogaillonia Linchevskii (= Gaillonia A. Rich. ex. DC), previously included in the Spermacoceae, also belongs to this tribe; the genera Pterogaillonia Linchevskii, Pseudogaillonia Linchevskii, Jaubertia Guill. and Choulettia Pomel are considered synonyms of Neogaillonia.
The Anthospermeae are believed to be closely, and the Paederieae more remotely, allied to the tribe Theligoneae.
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