Canthium kuntzeanum Bridson

Species

Angiosperms > Gentianales > Rubiaceae > Canthium

Characteristics

Perennial shrub, 2-10 m high. Leaves broadly elliptic, softly hairy on both sides, domatia as ciliate pits, base cuneate, apex obtuse to acute, margins wavy; petioles 3-6 mm long; stipules 2-3 mm long, few hairs inside. Flowers solitary, inconspicuous, greenish; peduncle 10-14 mm long. Calyx: tube 1 mm long, shortly dentate. Corolla greenish white; tube up to 4 mm long, pubescent. Stamens: anthers set at throat. Ovary: style scarcely exserted. Flowering time Oct.-Jan. Fruit obcordate, ± 15 x 15 mm, black; pyrene 10 x 5 mm, rugulose.
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Leaves well spaced along older branches, or less often restricted to new growth; blades 0.5–4 × 0.5–2.6 cm, broadly elliptic or sometimes ovate, obtuse to acute at the apex, cuneate or sometimes obtuse to rounded at the base, glabrous, papery, turning blackish when dry; lateral nerves, in 3–4 main pairs, inconspicuous; tertiary nerves obscure; domatia present as ciliate pits, sometimes incompletely formed or absent; petioles 3–6 mm long; stipules 2–3 mm long, sheathing at base then triangular, apiculate, with a few hairs inside.
Glabra ramis ramulisque teretibus, foliis ovatis acutis subnervosis basi subcordatis v. subiter attenuatis v. inaequilateris, pedunculis oppositis axillaribus patulis bifloris, floribus pedicellatis, stipulis cuspidatis. Ramuli erecto-patentes ramique epidermide tenui viridi vestiti. Pedunculus filiformis fere pollicem et pedicellus 5-7 lin. longi. Bacca oblique oblonga utrinque obtusa l locularis loculo uno abortivo.
Corolla greenish-white; tube 2.5–4 mm long, inside with a ring of deflexed hairs near the top and with some hairs projecting from throat; lobes 1.75–2.25 × 1.25–1.5 mm, oblong-triangular, acute.
Small tree or shrub, up to 4 m high, sometimes armed with small spines. Leaves ovate, concolorous, glabrous. Inflorescence 2-flowered, long-pedunculate. Corolla throat naked. Flowers greenish.
Shrub or small tree, or sometimes a liana, 1.7–10 m tall, often armed with supra-axillary spines; young stems slender, glabrous or occasionally pubescent; bark grey.
Flowers 5-merous, solitary, or with 2 or 3 borne on a common peduncle; peduncle 10–14 mm long; pedicels 8–15 mm long, or 16–28 mm long in solitary flowers.
Fruit (11)13–15 × 9–15 mm, either narrowly obovate or obcordate in lateral view, scarcely or distinctly indented at the apex.
Pyrene c. 10 × 5 mm, narrowly oblong-ellipsoid, point of attachment ± truncate with shallow crest running to apex, rugulose.
Anthers set at throat, apiculate with a central band of darkened connective tissue on the dorsal side.
Calyx tube c. 1 mm long; limb 0.5–1 mm long, repand and very shortly dentate.
Like C. ciliatum but leaves glabrous, often borne on spur shoots.
Pollen presenter c. 0.75 × 0.75 mm; disk glabrous.
Style scarcely exserted.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Mature height (meter) 2.0 - 10.0
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Environment

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Hardiness (USDA) 9-12

Usage

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Cultivation

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Distribution

Canthium kuntzeanum world distribution map, present in Mozambique, South Africa, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:968996-1
WFO ID wfo-0000798125
COL ID QNNS
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Plectronia parviflora Plectronia pauciflora Canthium pauciflorum Canthium kuntzeanum