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

1. Guihaiothamnus acaulis H. S. Lo, Bull. Bot. Res., Harbin. 18: 280. 1998.

桂海木 gui hai mu

Plants 3-7 cm tall; stems quadrangular, densely villosulous, becoming glabrescent. Petiole 5-20 mm, villosulous; leaf blade drying papery and grayish brown, broadly elliptic-oblong to obovate, 4.5-11 × 2.5-7.5 cm, villosulous on both surfaces or glabrescent adaxially, base cuneate to truncate and often shortly decurrent, apex rounded or broadly obtuse and shortly cuspidate; secondary veins 8-12 pairs, slender; stipules 1-2 mm, obtuse and partially reflexed. Inflorescences densely villosulous; bracts 1.5-1.7 mm. Calyx pilosulous, villosulous, or glabrous; hypanthium portion obovoid-ellipsoid, ca. 1.7 mm; lobes linear-lanceolate to narrowly triangular, 1.7-2 mm, acute to acuminate. Corolla pale red, glabrous outside; tube ca. 19 mm, ca. 1 mm in diam. at base, 3-3.5 mm in diam. at throat, sparsely villous inside; lobes elliptic or ovate-elliptic, ca. 3 mm, rounded. Fruit purplish red, 2.5-3 mm in diam.; seeds 0.2-0.3 mm. Fl. Apr, fr. Jul.

● Shady rocks; 100-600 m. Guangxi (Rongshui).


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