Bulbophyllum japonicum (Makino) Makino Bot. Mag. (Tokyo). 24: 31. 1910.

瘤唇卷瓣兰 liu chun juan ban lan

Cirrhopetalum japonicum Makino, Ill. Fl. Japan 1(7): t. 42. 1891; Bulbophyllum inabae Hayata; C. inabae (Hayata) Hayata.

Rhizome ca. 1.2 mm in diam., slender. Pseudobulbs 7-18 mm apart from each other, ovoid, 5-10 mm, 3-5 mm in diam., with a terminal leaf. Leaf subsessile; blade oblong or obliquely oblong, usually 3-4.5 × 0.5-0.8 cm, leathery, apical margins finely papillate, apex acute. Scape from base of pseudobulb, 2-3 cm; umbel often 2-4-flowered; peduncle ca. 0.8 mm in diam., with 3 tubular sheaths; floral bracts lanceolate, ca. 2 mm. Pedicel and ovary ca. 4 mm. Flowers purplish red. Dorsal sepal ovate-elliptic, ca. 3 × 1.5 mm, apex acute; lateral sepals lanceolate, 5-6 × ca. 2 mm, twisted near base, their upper and lower edges connivent to each other, apical margins incurved, apex acuminate. Petals subspatulate, ca. 2 × 1.5 mm, entire, obtuse-rounded; lip recurved, ligulate, ca. 2 mm, fleshy, narrowed and thinly cylindric in distal half, apex dilated and hooked-revolute. Column ca. 1.5 mm; foot ca. 1 mm, with free part ca. 0.5 mm; stelidia subulate, ca. 0.7 mm; anther cap subglobose. Fl. Jun. 2n = 40.

Tree trunks in broad-leaved forests, humid rocks along valleys; 600-1500 m. N Fujian, Guangdong, E and NE Guangxi, SW Hunan, Taiwan [Japan].