恒春钩藤 heng chun gou teng

Uncaria appendiculata Bentham, London J. Bot. 2: 222. 1843; Ourouparia setiloba (Bentham) Sakai; U. lanosa f. setiloba (Bentham) Ridsdale; U. philippinensis Elmer; U. setiloba Bentham.

Woody vines, height not noted. Young stems quadrangular, sparsely hirsute to glabrescent. Petiole 4-10 mm, sparsely hirsute to glabrescent; leaf blade drying papery, ovate, lanceolate, or lanceolate-oblong, 7-11 × 3.5-8 cm, adaxially shiny and glabrous except sparsely hirsute along veins, abaxially glabrescent except sparsely hirsute along veins, base rounded, truncate, or cordulate, apex acute to acuminate; secondary veins 6-9 pairs, usually with domatia in axils of secondary and often also tertiary veins; stipules persistent or caducous, ovate, 6-10 × 8-10 mm, 2-lobed for 1/3-1/2, lobes narrowly triangular, acute to acuminate. Inflorescences axillary and frequently also terminal, strigose to hirsute or glabrescent; peduncle 2.5-4.5 cm; bracts ca. 10 mm; flowering heads solitary (or 2), 18-20 mm in diam. across calyces, 30-37 mm in diam. across corollas; bracteoles apparently absent. Flowers sessile or subsessile. Calyx densely strigillose; hypanthium portion fusiform, ca. 2 mm; limb deeply lobed; lobes linear, ca. 2 mm, obtuse. Corolla color unknown, salverform, externally sparsely sericeous to glabrescent; tube ca. 12 mm; lobes oblong, ca. 2.5 mm, obtuse. Fruiting heads 30-40 mm in diam.; pedicels 5-9 mm. Fruit pedicellate, fusiform, 9-27 × 1-3 mm, strigose; seeds 2.5-3 mm. Fl. Feb, perhaps Oct, fr. Feb.

Forests; ca. 300 m. S Taiwan [Indonesia (Sulawesi), Philippines].

Ridsdale (loc. cit.: 70) keyed Uncaria lanosa based on its stipules that are subentire, but in our plants as well as the type of U. philippinensis, treated by him as a synonym of U. lanosa (NY, Web!), they are markedly 2-lobed.

Uncaria lanosa var. lanosa occurs in Australia, Borneo, Indonesia, Malaysia, Myanmar, New Guinea, Pacific islands (Caroline Islands, Palau, Solomon Islands), Philippines, and Thailand.