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FOC | Family List | FOC Vol. 19 | Rubiaceae | Ixora

4. Ixora effusa Chun & F. C. How ex W. C. Ko, Fl. Hainan. 3: 580. 1974.

散花龙船花 san hua long chuan hua

Shrubs, ca. 1 m tall; branches glabrous. Leaves opposite; petiole 0.5-1 cm, glabrous; blade drying thinly papery to papery and olive-greenish brown, oblanceolate to oblong, 10-18 × 3-7 cm, both surfaces glabrous, base cuneate to obtuse, apex acute or obtuse; secondary veins 8 or 9 pairs; stipules persistent, shortly fused around stem to subinterpetiolar, triangular, 2-8 mm, glabrous, obtuse to acute with arista 2-9 mm. Inflorescence terminal, corymbiform, 7-11 cm wide, lax, with axes usually spreading at 45°-90°, glabrous; peduncle 0.5-4 cm, articulate and with reduced leaves near base; bracts linear, narrowly triangular, or ligulate, 0.5-5 mm; pedicels to 10 mm. Flowers sessile to pedicellate. Calyx glabrous; hypanthium turbinate, ca. 1 mm; limb deeply lobed; lobes lanceolate to ligulate, 1-1.4 mm, acute to rounded. Corolla white or pale purple; tube 7-11 mm, glabrous at throat; lobes narrowly lanceolate, 5-9 × ca. 2.3 mm, acute. Drupe subglobose, 8-9 mm in diam., glabrous. Fl. Apr-May.

Forests at middle elevations; ca. 500 m. Guangxi, Hainan [Vietnam].


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