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

8. Lasianthus chinensis (Champion ex Bentham) Bentham, Fl. Hongk. 160. 1861.

粗叶木 cu ye mu

Mephitidia chinensis Champion ex Bentham, Hooker’s J. Bot. Kew Gard. Misc. 4: 196. 1852; Lasianthus dinhensis Pierre ex Pitard; M. odajimae Masamune.

Shrubs, 1-4 m tall; branches and branchlets terete, densely pubescent or puberulent to strigillose. Petiole 0.5-1.5 cm, densely pubescent or puberulent to strigillose; leaf blade subleathery, oblong to elliptic, 11-25 × 2.5-7 cm, glabrous adaxially, thinly to densely pubescent or puberulent to strigillose abaxially, base acute or obtuse, margin plane or usually reflexed, apex acute or acuminate; lateral veins 9-15 pairs; nervules reticulate, slightly elevated abaxially; stipules generally persistent, triangular to narrowly triangular, 1.5-3 mm, densely pubescent or puberulent to strigillose. Inflorescences subcapitate to congested-cymose, sessile to subsessile; bracts reduced. Flowers sessile or subsessile. Calyx puberulent to strigillose; hypanthium portion globose to ellipsoid, 1.5-3 mm; limb 1.5-2.5 mm, lobed for 1/2-2/3; lobes 4-6, triangular, ovate, or orbicular, becoming reflexed. Corolla 10-15 mm, densely strigillose to sericeous outside; lobes 5 or 6, lanceolate. Fruit globose to depressed globose, 5-8 mm in diam., pubescent to strigillose, with 5 or 6 conspicuous longitudinal angles; pyrenes 5 or 6. Fl. May-Jun, fr. Sep-Oct.

Forests, shaded and wet places; below 100-900 m. Fujian, Guangdong, Guangxi, Hainan, Taiwan [Cambodia, Laos, Malaysia, Philippines, Thailand, Vietnam].

The relatively large flowers with the large globose to ellipsoid hypanthium (i.e., ovary) portion is distinctive; Lasianthus verticillatus is similar in these characters but can be distinguished by its truncate to denticulate calyx limb and smooth fruit. The calyx limb often enlarges as the fruit develops.


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