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Herbs, shrublets, or shrubs, erect. Stems (3 or) 4-sided, pubescent. Leaves opposite or sometimes 3-whorled, petiolate or sessile; leaf blade usually pubescent, secondary veins 1-3 on each side of midvein, tertiary veins numerous and parallel, margin entire. Inflorescences terminal, capitate or panicled. Flowers 4- or 5-merous, purple or white, usually bracteate. Hypanthium urceolate or flask-shaped, often setiform tuberculate, stellate appendaged, pectinate tuberculate or with polycylic setiform stellate trichomes on stalks. Calyx lobes linear, lanceolate, or ovate-lanceolate, margin ciliate. Petals obovate or broadly ovate, margin ciliate or not. Stamens twice as many as perianth segments, isomorphic, equal or subequal; filaments shorter or as long as anthers; anthers oblong or oblong-ovate, beak long or short; connective decurrent, base abaxially slightly inflated or shortly spurred and sometimes with 1 or 2 setose, adaxially lengthened tubercles. Ovary half inferior, 4- or 5-celled, adherent to hypanthium, apex with a setose ring. Style filiform. Capsule ribbed, middle often contracted, dehiscing at truncate apex by 4 or 5 pores. Seeds numerous, curved (cochleate), small, densely granulate.

About 50 species: tropical W Africa, tropical and subtropical Asia; five species in China.

The Asian species of Osbeckia were revised by Hansen (Ginkgoana 4: 1-150, pl. 1-20. 1977) .[1]


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The Genus Osbeckia is a member of the Family Melastomataceae. Here is the complete "parentage" of Osbeckia:

The Genus Osbeckia is further organized into finer groupings including:


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  1. Jie Chen & Susanne S. Renner "Osbeckia". in Flora of China Vol. 13 Page 360, 361. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at


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Last Revised: August 27, 2014
2014/08/27 07:22:47