Rhamnella Miq.

Genus

Angiosperms > Rosales > Rhamnaceae

Characteristics

Shrubs or small trees, rarely scandent, evergreen to mostly deciduous. Leaves alternate, shortly petiolate; stipules narrowly triangular or lanceolate, often persistent; leaf blade papery or submembranous, pinnately veined, margin serrulate. Flowers yellow-green, small, bisexual, 5-merous, pedicellate, in shortly pedunculate axillary cymes, or fascicled in axils of leaves. Calyx tube cup-shaped; lobes triangular, midvein adaxially keeled and with centrally inserted beaklike protrusion. Petals ovate-spatulate or orbicular-spatulate, ± distinctly cucullate, enfolding stamens. Stamens dorsifixed; filaments free from claw at base, lanceolate-linear. Disk pentagonous, thin, lining calyx tube, nectariferous. Ovary superior, base slightly immersed in disk, 1-or 2-loculed or imperfectly 1-loculed, with 2 ovules per locule; styles terminally 2-fid. Drupe yellowish to orange, turning black or purple-black when ripe, cylindric-ellipsoidal base with persistent remnants of calyx tube, with rudimentary style at apex, 1-or 2-loculed, with 1 or 2 seeds.
More
Scandent shrubs, small trees or lianas, evergreen (in Australia) or deciduous. Leaves subopposite to alternate, petiolate; stipules free, often persistent; lamina with serrulate or denticulate margin. Inflorescences axillary cymes or fascicles of flowers in axils of leaves; bracts persistent. Flowers bisexual, 5-merous, yellow to greenish, pedicellate. Hypanthium cup-to dish-shaped. Sepals erect or spreading, lobes triangular, keeled. Petals cucullate or longitudinally rolled around the stamens, clawed, erect or incurved. Stamens subequal to the petals, incurved or erect. Disc conspicuous, filling the hypanthium, smooth, glabrous, nectariferous. Ovary ± superior, immersed in disc but free from it; carpels 1 or 2; style 2-fid at tip. Fruit an ellipsoid, succulent drupe, first yellow to orange or red, turning purple to black when ripe, with rudimentary style at apex, 1 or 2 loculed, with 1 or 2 seeds.
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