Shrubs, usually deciduous (Ribes speciosum semievergreen, R. viburnifolium evergreen). Leaves alternate, simple; stipules present; petiole present [absent]; blade lobed or cleft (unlobed in R. speciosum and R. viburnifolium), margins toothed [subentire]. Inflorescences terminal or axillary, usually racemes, sometimes corymbs or solitary flowers. Flowers bisexual (unisexual in R. diacanthum); perianth and androecium epigynous; hypanthium wholly or partially adnate to ovary, free distally; sepals usually 5 (R. speciosum 4), connate proximally; petals usually 5 (R. speciosum 4), distinct; nectary disc present; stamens (4-)5, antisepalous, inserted on hypanthium, free or adnate to hypanthium, distinct; anthers introrsely dehiscent by longitudinal slits; pistils 1, 2-carpellate; ovary partly to completely inferior, 1-locular; placentation parietal; ovules anatropous, bitegmic, crassinucellate; styles 2, distinct, connate proximally or nearly completely; stigmas 2, terminal, capitate. Fruits baccate. Seeds (3-)10-60, brown to black, fusiform to oblong-ellipsoid or ellipsoid; embryo straight; endosperm copious, oily, not starchy. Fls regular or nearly so, mostly perfect, perigynous to more often epigynous with a prolonged, saucer-shaped to tubular hypanthium, the (3–)5(–9) persistent sep appearing as lobes on the hypanthium or sometimes forming a cal-tube that extends beyond the hypanthium, sometimes ± petaloid and more showy than the proper pet, these sometimes wanting; stamens mostly as many as and opposite the sep, but a second, functional or staminodial set sometimes present alternate with the sep; carpels 2–3(–7) generally united to form a compound, superior to usually ± inferior ovary, this plurilocular with axile placentas, or unilocular with ± intruded parietal placentas; fr a capsule or berry with numerous, often arillate seeds; endosperm copious to scanty; cotyledons 2; shrubs or sometimes trees with mostly alternate, simple (but often deeply cleft), exstipulate or seldom (as in Itea) stipulate lvs, the fls mostly in racemes, less often in panicles or small umbels or corymbs or solitary and axillary. 25/300+. SELECTED REFERENCE Weigend, M. 2007. Grossulariaceae. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 9+ vols. Berlin etc. Vol. 9, pp. 168-176. SELECTED REFERENCE Weigend, M. 2007. Grossulariaceae. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 9+ vols. Berlin etc. Vol. 9, pp. 168-176. Shrubs, usually deciduous (Ribes speciosum semievergreen, R. viburnifolium evergreen). Leaves alternate, simple; stipules present; petiole present [absent]; blade lobed or cleft (unlobed in R. speciosum and R. viburnifolium), margins toothed [subentire]. Inflorescences terminal or axillary, usually racemes, sometimes corymbs or solitary flowers. Flowers bisexual (unisexual in R. diacanthum); perianth and androecium epigynous; hypanthium wholly or partially adnate to ovary, free distally; sepals usually 5 (R. speciosum 4), connate proximally; petals usually 5 (R. speciosum 4), distinct; nectary disc present; stamens (4-)5, antisepalous, inserted on hypanthium, free or adnate to hypanthium, distinct; anthers introrsely dehiscent by longitudinal slits; pistils 1, 2-carpellate; ovary partly to completely inferior, 1-locular; placentation parietal; ovules anatropous, bitegmic, crassinucellate; styles 2, distinct, connate proximally or nearly completely; stigmas 2, terminal, capitate. Fruits baccate. Seeds (3-)10-60, brown to black, fusiform to oblong-ellipsoid or ellipsoid; embryo straight; endosperm copious, oily, not starchy. Fls regular or nearly so, mostly perfect, perigynous to more often epigynous with a prolonged, saucer-shaped to tubular hypanthium, the (3–)5(–9) persistent sep appearing as lobes on the hypanthium or sometimes forming a cal-tube that extends beyond the hypanthium, sometimes ± petaloid and more showy than the proper pet, these sometimes wanting; stamens mostly as many as and opposite the sep, but a second, functional or staminodial set sometimes present alternate with the sep; carpels 2–3(–7) generally united to form a compound, superior to usually ± inferior ovary, this plurilocular with axile placentas, or unilocular with ± intruded parietal placentas; fr a capsule or berry with numerous, often arillate seeds; endosperm copious to scanty; cotyledons 2; shrubs or sometimes trees with mostly alternate, simple (but often deeply cleft), exstipulate or seldom (as in Itea) stipulate lvs, the fls mostly in racemes, less often in panicles or small umbels or corymbs or solitary and axillary. 25/300+.General Information
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Source: [
Literature
Source: [
Flora of North America @ efloras.org
LiteratureNortheastern Flora
General Information
