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Schradereae Bremek. Search in IPNISearch in NYBG Virtual HerbariumSearch in Flora do Brasil 2020Search in Living Collections Decrease font Increase font Restore font

Published In: Recueil des Travaux Botaniques Néerlandais 31: 253. 1934. (Recueil Trav. Bot. Néerl.) Name publication detail

Project Name Data (Last Modified On 8/16/2017)
Acceptance : Accepted
Project Data     (Last Modified On 8/17/2017)

The Tribe Schradereae includes three genera and probably at least 100 rather succulent, usually climbing and epiphytic species found in both the Neotropics and part of the Paleotropics. This tribe is characterized by by raphide crystals in the tissues; a fleshy perennial habit; opposite ligulate, often obtuse to rounded, deciduous stipules that are held flat together and erect in bud and are interpetiolar or shortly fused into a tube; terminal or rarely axillary capitate inflorescences or solitary flowers enclosed by a truncate involucare; - to 5-(6-)merous distylous flowers without calycophylls; tubular truncate calyx limbs; well developed corollas with the the lobes valvate in bud; and fleshy baccate fruits with numerous small angled seeds. Its centers of diversity are in northern South America and Malesia. This tribe has mostly been surveyed taxonomically at least at a basic level in the Neotropics, but is very poorly known in the Paleotropics.

This tribe was considered for some time to be a monotypic, morphologically unusual Neotropical group with one Neotropical genus, Schradera (Bremekamp, 1934). Robbrecht (1988) then noted that the Paleotropical Lucinaea agreed with the characters of this tribe and classified it here. Puff et al. (1992) studied this suggestion in detail and concluded that these genera are not distinct. In this work they synonymized the genera, and Puff et al. (1998) later transferred the species of Lucinaea nomenclaturally to Schradera. Puff & Buchner (1998) also surveyed several other Asian and Malesian Rubiaceae, and expanded the Schradereae to include also Lecananthus and Leucocodon and presented a key to its genera. The tribe Schradereae was supported as a separate clade in the molecular analyses of Bremer & Eriksson (2009), which only included the type genus.

Species of this tribe are commonly confused with species of Tribe Cinchoneae, which share similar stipules, fruit, and seeds; but Cinchoneae are erect shrubs and trees without raphides in their tissues. Species of Schradereae are quite similar to those of Tribe Hilleae, which are also epiphytes with similar stipules, but Hillieae have convolute or imbriate corolla lobes, capsular fruits with winged flattened seeds, and the inflorescence bracts reduced.

Author: C.M. Taylor
The content of this web page was last revised on 15 August 2017.
Taylor web page: http://www.mobot.org/MOBOT/Research/curators/taylor.shtml

Distribution: Humid to very wet vegetation from lowlands to montane areas, in the Neotropics found throughout the Antilles and from southern Central America to Bolivia and eastern Brazil, in the Paleotropics found from New Guinea to southern Indonesia and in Sri Lanka.
Taxa Included Here: Genera of Schradereae:
Lecananthus Jack
Leucododon Gardner
Lucinaea DC. = Schradera Vahl
Schradera Vahl

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