Antirhea Comm. ex Juss.

Quina (en)

Genus

Angiosperms > Gentianales > Rubiaceae

Characteristics

Trees or shrubs, dioecious, unarmed. Raphides absent. Leaves opposite [or sometimes whorled], often with domatia; quaternary venation lineolate [or sometimes regularly areolate]; stipules caducous or persistent, interpetiolar, generally triangular to oblong. Inflorescences axillary, cymose with axes dichotomous or often markedly scorpioid, few flowered with flowers often fewer on pistillate plants, pedunculate, bracteate or bracts reduced. Flowers sessile, unisexual. Calyx sericeous outside; limb truncate or 4[or 5]-lobed; lobes often unequal. Corolla white or yellow, salverform in staminate flowers, funnelform in pistillate flowers, with tube often prolonged and slender, inside glabrous or pubescent in throat; lobes 4[or 5], obtuse, imbricate in bud. Stamens 4[or 5], inserted in corolla throat, partially exserted; filaments short or reduced; anthers dorsifixed. Ovary 2-8-celled, ovule 1 in each cell, apical and pendulous, with funicle thickened; stigma capitate or 2-or 3-lobed, included. Fruit dark purple, drupaceous, thinly fleshy, ellipsoid to subglobose and smooth, with calyx limb and subtending bracts persistent; pyrene 1, 2-8-celled with 1 seed in each cell, ellipsoid, woody or bony; seeds cylindrical, medium-sized, without endosperm; cotyledons compressed and minute; radicle clavate and ascending.
More
Trees or shrubs. Leaves often coriaceous, the stipules deciduous or persistent. Inflorescences axillary, cymose, the peduncle when present with branches spreading, the flowers secundly disposed, the bracteoles present or absent. Flow-ers with the hypanthium ovoid or obovoid, the calyx lobes persistent; corolla funnelform, the 4-5 lobes imbricate, 2 of them exterior; stamens 4-5, included or scarcely exserted, the anthers slender, dorsifixed, often pubescent; style slen-der, the stigma knoblike or 2-3-lobed, included, the ovary 2-10-celled, the ovules solitary, pendulous. Fruits drupaceous, thin carnose, the shell ligneous or bony, the seeds elongate, pendulous.
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Hardiness (USDA) 9-12

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