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Chinese Plant Names | Family List | Rubiaceae | Canthium

Canthium simile Merr.


Description from Flora of China

Erect shrubs to small trees, 4-10(-18) m tall, unarmed; branches glabrous, somewhat compressed becoming terete. Leaves borne along developed stems; petiole 5-8 mm, glabrous; blade drying thinly to thickly papery, ovate to ovate-oblong or elliptic-oblong, 9-19 × 4-8.5 cm, adaxially shiny and glabrous or sometimes pustulose, abaxially glabrous to pilosulous or pilose, base obtuse to rounded, apex shortly acuminate; secondary veins 6-8 pairs, in abaxial axils with small foveolate domatia; stipules deciduous, shortly united around stem, triangular, 2-8 mm, sparsely pilosulous to glabrous, keeled, cuspidate to acuminate. Inflorescences corymbiform to cymose, 2.5-3 × ca. 2 cm, several flowered, puberulent to hirtellous; peduncle 10-14 mm; bracts reduced; pedicels 2-3 mm. Calyx puberulent to glabrous; ovary portion obconic to hemispherical, 1-1.5 mm; limb ca. 0.5 mm, 5-lobed; lobes broadly ovate-triangular, acute. Corolla white, urceolate-tubular, outside glabrous; tube 1.5-2 mm, inside villous in throat; lobes 5, triangular to spatulate, 1.5-3 mm, acute. Ovary 2-locular; stigma ca. 1.2 mm. Infructescences expanded, to 7 × 9 cm; fruiting pedicels to 12 mm. Drupes with color not noted, obovoid, laterally compressed, often somewhat dicoccous, 10-20 × 9-15 mm, glabrescent, with calyx limb deciduous; pyrenes 2, plano-convex. Fl. Jan-Mar, fr. Jun-Jul.

This species is newly reported here from Vietnam, based on Thorel 1294 (GH).

The measurements of the flower parts given by Merrill and Chun in the protologue do not agree with the measurements inferred from their figure 2; their figure seems to have been reproduced at twice the size they planned.

Broad-leaved forests at low to middle elevations; 200-1500 m. Guangdong, Guangxi, Hainan, Yunnan [Vietnam].


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