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FOC | Family List | FOC Vol. 19 | Adoxaceae | Viburnum

7. Viburnum sect. Odontotinus Rehder in Sargent, Trees & Shrubs. 2: 113. 1908.

齿叶组 chi ye zu

Winter buds with 2 or 3 pairs of separate scales. Inflorescence a compound umbel-like cyme, usually pedicellate, without large sterile radiant flowers. Corolla rotate or campanulate-rotate. Fruit maturing red, rarely maturing black; pyrenes with 1 or 2 deep or shallow dorsal grooves, and 1-3 ventral grooves, endocarp solid.

About 30 species: temperate Asia and North America, only one species in the European Caucasus; 22 species (15 endemic) in China.

H. Hara (Ginkgoana 5: 229-267. 1983) recognized three subsections: Viburnum subsect. Odontotinus for Asiatic species with entire leaves, V. subsect. Dentata (Maximowicz) H. Hara for North American species, and V. subsect. Lobata (Oersted) H. Hara for species with 3-5-lobed leaf blades. Recent phylogenetic work shows that this section is polyphyletic, with two distinct clades. The first one consists of New World species together with South American species from V. sect. Oreinotinus (Oersted) Bentham & J. D. Hooker and a second clade for Old World species. This Old World clade can be further split into species with 3-5-lobed leaf blades ("Lobata" clade) and the remaining species ("Succodontotinus" clade). Old World V. sect. Odontotinus are sister to V. cylindricum (i.e., V. sect. Megalotinus).

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