Bertiera Aubl.

Genus

Angiosperms > Gentianales > Rubiaceae

Characteristics

Small trees or shrubs, rarely lianas. Leaves shortly petiolate; petioles normally channelled above; blades thin or scarcely coriaceous, mid-and lateral nerves usually prominent beneath; stipules persistent, usually connate above the nodes for a short distance. Flowers of moderate size (rarely very small), borne in terminal, spicate thyrsoid panicles, scorpioid cymes or spherical compact heads, very occasionally axillary (not in Flora area). Calyx with limb produced above the tube, cup-shaped and frequently wider than the tube, truncate or 5-toothed or-lobed. Corolla with hairy throat, often with the walls of tube toughened or thick; tube exceeding the calyx-limb; lobes (4–)5, usually acuminate or apiculate, contorted in bud. Anthers (4–)5, subsessile, attached by very short filaments near the base, included, linear, sagittate or bilobed at the base, the connective extended into an apiculate apex. Ovary 2-locular with the numerous ovules inserted on a thickened placenta; disc glabrous, fleshy, cup-shaped, or annular; stigma borne on style ± club-shaped, formed from 2 flattened appressed branches (seldom separating), with 10 membranous linear vanes which fit between the anthers in the bud. Fruit indehiscent, ovoid or globose, often coriaceous; calyx persistent; pedicels sometimes accrescent. Seeds red-brown to black, angular, rugulose or granulose, numerous.
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Shrubs or small trees. Leaves petiolate or sessile; stipules connate, the sheath bifid. Inflorescences terminal, cymose paniculate, pedunculate, the bracts nar-row. Flowers with the hypanthium subglobose or turbinate, the calycine cup truncate and edentate or with 5 teeth; corolla funnelshaped, the tube usually sericeous outside, the lobes 5, ovate, contorted; stamens 5, the anthers ovate or subulate, dorsifixed, the connective acuminate or produced at the apex, the fil-aments short, attached to the tube; ovarian disc cupular or annular, the style slender, glabrous, the stigmas entire or disposed as 2 narrow lobes, the ovary 2-celled, the ovules numerous, the placentas entire, affixed to the septum. Fruits baccate, fleshy; seeds numerous, small, angulate, the testa foveolate or granulate.
Ovary 2-celled with the numerous ovules inserted on a thickened placenta; pollen presenter ± club-shaped, formed from 2 flattened appressed branches (seldom separating), with 10 membranous linear vanes which fit between the anthers in bud.
Corolla with a hairy throat, often with the walls of tube toughened or thick; tube exceeding the calyx limb; lobes (4)5, usually acuminate or apiculate, contorted to the left in the bud.
Anthers (4)5, included, subsessile, attached by very short filaments near the base, linear, sagittate or bilobed at the base; connective extended into an apiculate apex.
Flowers hermaphrodite, 5-merous, of moderate size (rarely very small), borne in terminal, spicate thyrsoid panicles, scorpioid cymes or spherical compact heads.
Leaves shortly petiolate; blades thin or scarcely coriaceous, mid and lateral veins usually prominent beneath; petioles normally channelled above.
Calyx limb-tube cup-shaped and frequently wider than the tube in flower, but narrower in fruit, truncate or 5-toothed or-lobed.
Fruit indehiscent, ovoid or globose, often coriaceous; calyx limb persistent and pedicels sometimes accrescent.
Stipules persistent, usually connate above the nodes for a short distance.
Seeds numerous, red-brown to black, angular, rugulose or granulose.
Disk cup-shaped or annular, glabrous, fleshy.
Small trees or shrubs, rarely lianes.
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Hardiness (USDA) 9-12

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