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

1. Mouretia inaequalis (H. S. Lo) Tange, Nordic J. Bot. 17: 127. 1997.

广东杜丽草 guang dong du li cao

Mouretia tonkinensis Pitard var. inaequalis H. S. Lo, Bull. Bot. Res., Harbin 6(4): 48. 1986; M. guangdongensis H. S. Lo.

Weak herbs, 30-40 cm tall; stems angled to subterete, densely puberulent or villosulous-tomententulose to glabrescent. Leaves subequal to distinctly unequal, varied along stems; petiole 5-15 mm, densely villosulous; blade drying thinly papery and olive-green, elliptic-oblong, elliptic, elliptic-ovate, or obovate, larger blades 4-9 × 2-4 cm, smallest blades 1.5-2 × 0.8-1 cm, adaxially glabrous, abaxially glabrescent on lamina and villosulous to strigillose-villous along principal veins, base cuneate, obtuse, or rounded, apex acute to obtuse and shortly acuminate; secondary veins 5-8 pairs; stipules leaflike, shortly stipitate with "blade portion" subovate to obovate or subreniform, (1-)2.5-5 mm, glabrescent, obtuse to rounded. Inflorescences congested-cymose, terminal and/or pseudoaxillary, several flowered, densely puberulent-tomentulose to strigillose; peduncle 2-5 mm; bracts lanceolate to narrowly triangular, 1-2 mm; pedicels to 1.5 mm. Flowers free, subsessile to pedicellate. Calyx puberulent-hispidulous; hypanthium portion obovoid, 1-1.5 mm; limb lobed nearly to base; lobes lanceolate to narrowly triangular, 1.7-2(-2.5) mm, entire to ciliolate. Corolla yellow, white, or pink, tubular-salverform, densely hispidulous-puberulent with stout trichomes outside; tube 2-2.5 mm, internally with ring of trichomes near middle; lobes triangular, ca. 2 mm, abaxially appendaged near apex. Capsules obconical-subglobose, ca. 3 mm, glabrescent to puberulent, with persistent calyx limbs sometimes elongating to 3 mm; seeds 0.4-0.5 mm. Fl. Aug, fr. May.

On rocks in dense forests. Fujian, Guangdong, Guangxi (Qinzhou) [Vietnam].

The description above includes measurements from Tange based on specimens from Vietnam, including near the Chinese border. This species is illustrated by Tange (loc. cit.: 126, t. 2, f. D). Tange separated Mouretia tonkinensis from the Chinese plants by its consistently isophyllous leaves, fully capitate inflorescences, calyx lobes with tips quickly becoming scarious and whitened, smaller corollas (with tube ca. 2.5 and lobes 1.1 mm), and smaller fruit (ca. 1.5 mm).


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