ORCHIDACEAE - China

438EPIDENDROIDEAErounded and mucronate. Scapes 1 or 2, axillary, erect, ca. 10mm; raceme 2-flowered; peduncle slender; floral bracts elliptic,shorter than pedicel and ovary. Pedicel and ovary ca. 1 mm.Flowers yellowish white, tinged with purple on lip. Sepalsmembranous, glabrous, 3-veined; dorsal sepal oblong, ca. 2.5 ×1 mm, apex obtuse; lateral sepals obliquely ovate-triangular,2.6–4 × 1.5–2 mm, apex acute. Petals oblong, 1.3–2.4 × 0.6–1mm, 1-veined, entire, acute; lip ovate-triangular, 1.5–2.4 × ca. 1mm, 3-veined, base attached to end of column foot by an immobilejoint, margin entire, apex obtuse-rounded. Column 0.7–1 mm, base with a foot 1–2 mm; stelidia deltoid, very small. Fl.Apr.● Tree trunks in dense forests; 600–800 m. C and N Taiwan.17. Bulbophyllum sect. Tripudianthes Seidenfaden, Dansk Bot. Ark. 33(3): 188. 1979.Tripudianthes (Seidenfaden) Szlachetko & Kras.双 叶 卷 瓣 兰 组 shuang ye juan ban lan zuRhizome creeping, roots sprouting mainly below pseudobulbs, spreading; new shoots arising from basal node of pseudobulb.Pseudobulbs distinct, apex with 2 leaves. Leaves deciduous, thin. Inflorescences solitary, mostly arising near pseudobulbs, an elongateor somewhat contracted 2- to several-flowered raceme. Pedicel with basal node ± coinciding with attachment of subtendingbract. Dorsal sepal with margins ± glabrous to erose or fimbriate, 3-veined; lateral sepals fused along their lower margins, 2–5 × aslong as dorsal sepal, margins glabrous, 3–7-veined. Petals: margins fimbriate, 1-veined; lip: margins without auricles or distinct laterallobes, margins glabrous to papillose or ciliate, adaxially partly papillose and hirsute. Column: stigma protruding at its base ornot, foot short; anther: front margin projecting or not, abaxially with or without a low, rounded crest; pollinia 4, inner less than 1/2 aslong as outer or longer, all without appendages.Eleven provisionally accepted species: India to Indochina, Thailand, Java; two species in China.1a. Margins of dorsal sepal irregularly fimbriate ............................................................................................................... 97. B. wallichii1b. Margins of dorsal sepal glabrous ........................................................................................................................... 98. B. khaoyaiense97. Bulbophyllum wallichii (Lindley) H. G. Reichenbach, Ann.Bot. Syst. 6: 259. 1861.双 叶 卷 瓣 兰 shuang ye juan ban lanCirrhopetalum wallichii Lindley, Gen. Sp. Orchid. Pl. 59.1830; Bulbophyllum refractoides Seidenfaden; Phyllorkis wallichii(Lindley) Kuntze; Tripudianthes wallichii (Lindley)Szlachetko & Kras.Pseudobulbs close, ovoid, ca. 1 cm in diam., with 2 leavesat apex. Leaf deciduous at anthesis, subsessile; blade narrowlyoblong, usually ca. 5 × 1 cm, apex acute. Scape from base ofleafless pseudobulb, erect, 10–15 cm, sparsely with 2 tubularsheaths; raceme usually nodding, ca. 4 cm, few to many flowered;floral bracts yellowish green, ovate-lanceolate, ca. 4 mm,apex acuminate. Sepals and petals yellowish brown, with densepurple spots, usually turning tangerine; lip purplish black adaxiallyand pale tangerine abaxially. Dorsal sepal lanceolate, ca. 5× 1.7 mm, 1-veined, margins irregularly fimbriate, apex longacuminate and hooked; lateral sepals narrowly oblong, 37–40 ×2–2.5 mm, base adnate to column foot, twisted near base,sparsely ciliate, their lower edges connate to each other, apexacute and ± curved. Petals obliquely ovate-triangular, ca. 3 ×1.5 mm, margins irregularly fimbriate-ciliate, 1-veined, apexacuminate and ± hooked; lip reflexed, subligulate, ca. 3.5 mm,fleshy, margins and abaxial surface ± hairy, base attached to endof column foot by a mobile joint, apex obtuse. Column white,ca. 1.5 mm, base with a distinct foot; stelidia narrowly cylindric,ca. 1.5 mm; anther cap purple, subglobose, finely papillate.Fl. Mar–Apr. 2n = 38.Tree trunks in forests; 1400–1500 m. S and W Yunnan [Bhutan,NE and NW India, Myanmar, Nepal, Thailand, Vietnam].98. Bulbophyllum khaoyaiense Seidenfaden, Bot. Tidsskr. 65:342. 1970.白 花 卷 瓣 兰 bai hua juan ban lanBulbophyllum tripudians E. C. Parish & H. G. Reichenbachvar. pumilum Seidenfaden & Smitinand.Pseudobulbs close, subovoid, 1.3–2 cm, 7–8 mm in diam.,with 2 leaves at apex. Leaves deciduous at anthesis. Scape frombase of pseudobulb, erect, 14–15.5 cm; raceme nodding, 5–6cm, usually with more than 10 secund flowers; peduncle stout,ca. 2 mm in diam., with 2 or 3 membranous sheaths; floralbracts lanceolate, ca. 3 mm, apex acuminate. Pedicel and ovaryca. 2 mm. Flowers thinly textured, white, with purplish red lip.Dorsal sepal narrowly ovate-triangular, ca. 8 × 2 mm, adaxiallysparsely with short hairs, margin entire, apex long acuminate;lateral sepals lanceolate, ca. 20 × 2.5 mm, abaxial base denselypapillate, base adnate to column foot, twisted near base, withtheir lower edges connate to each other, margin entire, apexacuminate. Petals narrowly triangular, ca. 4 × 1.2 mm, marginssparsely fimbriate-ciliate, apex long acuminate; lip ca. 2 × 1mm, fleshy, fleshy-thickened in apical half, with papillate hairsadaxially, base attached to end of column foot by a mobile joint.Column ca. 1.5 mm, base with a foot ca. 1 mm; stelidia subulate,ca. 1 mm, ± hooked; anther cap subglobose, apex denselypapillate. Fl. Mar.Tree trunks in forests; ca. 1400 m. S Yunnan [Thailand].18. Bulbophyllum sect. Pleiophylla J. J. Smith, Bull. Jard. Bot. Buitenzorg, sér. 2, 13: 34. 1914 [“Pleiophyllus”].双 叶 石 豆 兰 组 shuang ye shi dou lan zuRhizome creeping, roots sprouting mainly below pseudobulbs, spreading; new shoots arising from basal node of pseudobulb.