1. Pertusadina metcalfii (Merrill ex H. L. Li) Y. F. Deng & C. M. Hu, Blumea. 51: 559. 2006.
海南槽裂木 hai nan cao lie mu
Adina metcalfii Merrill ex H. L. Li, J. Arnold Arbor. 24: 454. 1943; A. affinis F. C. How; A. hainanensis F. C. How; A. polycephala Bentham var. glabra F. C. How; Pertusadina hainanensis (F. C. How) Ridsdale.
Shrubs to large trees, perhaps evergreen, to 30 m tall; branches angled to terete, reddish brown becoming gray, puberulent to glabrous, with scattered lenticels. Petiole 3-25 mm, glabrous or puberulent; leaf blade drying thickly papery, elliptic to elliptic-oblong or oblanceolate, 4-12 × 1.5-5 cm, adaxially glabrous and rather shiny, abaxially glabrous to puberulent, base cuneate to obtuse, apex acuminate; lateral veins 6-10 pairs, in abaxial axils with foveolate and/or pilosulous domatia; stipules linear-oblong to subulate, 4-6 × 1-2 mm, glabrous, apex acute or occasionally emarginate to shortly bifid. Inflorescence puberulent to glabrescent; peduncles 1-6.5 cm; flowering heads solitary on peduncles or occasionally 3 in a cyme, 6-8 mm in diam. across calyces, ca. 15 mm in diam. across corollas; bracteoles linear-clavate to linear-spatulate, 0.5-1 mm, at apex ciliate. Calyx puberulent to pilosulous at least at junction of ovary and limb; ovary portion obconic, 0.5-0.7 mm, surrounded at base by ring of trichomes 0.2-0.5 mm; limb deeply lobed; lobes linear-oblong to spatulate, 1.5-2 mm. Corolla with tube 2-2.5 mm, glabrous inside; lobes deltoid, 0.7-1 mm. Stigmas obovoid, ca. 0.3 mm, exserted for 7-8 mm. Fruiting head 10-12 mm in diam. Capsules 2-4 mm, puberulent to strigose; seeds 1-2 mm. Fl. May-Jun, fr. Sep-Dec.
Dense forests; 100-900 m. Fujian, Guangdong, Guangxi, Hainan, Hunan, Zhejiang [Thailand].
Pertusadina metcalfii was illustrated by How (Sunyatsenia 6: 239, f. 28; 241, f. 29. 1946, the first as "Adina affinis" and the second as "Adina hainanensis"). Ridsdale (Blumea 24: 354. 1979) treated this species as P. hainanensis, but, as noted by Deng and Hu (loc. cit.), the names listed in synonymy by him included an older name that has priority, A. metcalfii, confirmed by them as conspecific.