ORCHIDACEAE - China

394EPIDENDROIDEAEStems erect, cylindric or ± narrowly fusiform, 3–27 cm,with sheath 4–10 mm in diam., fleshy, many noded, currentones enclosed in leaf sheaths, previous year’s stems golden yellow.Leaf blade distichous, alternate on entire stem, oblong, 4–10 × to 1.7 cm, thin, base dilated into gibbous sheaths, apexacute and unequally bilobed; leaf sheaths sparsely claspingwhen dry, herbaceous, sheath mouth obliquely truncate. Inflorescences1–4, subterminal or lateral on upper part of stem,suberect, to 13 cm, much taller than leaves, densely 20- or moreflowered; rachis slender; floral bracts ovate-lanceolate, 2–4mm, apex acuminate. Pedicel and ovary ca. 5 mm. Flowers yellowishgreen, sepals purplish red at base, petals pale yellowishgreen with purplish red stripes, lip violet, column pale purple.Dorsal sepal narrowly ovate-lanceolate, ca. 11 × 2 mm, 3-veined, long acuminate; lateral sepals falcate-lanceolate, to 14 ×ca. 4.3 mm, 4- or 5-veined, base oblique, abruptly contractedabove middle, apex caudate; mentum broadly conic, ca. 4 mm.Petals ovate-lanceolate, slightly smaller than dorsal sepal, 3-veined, apex acute; lip ca. 8 × 4 mm, 3-lobed above middle;lateral lobes ovate-triangular, margin with comb-shaped teeth,apex sharply toothed; mid-lobe triangular, margin wrinkled andcrestlike, apex acute; disk with 2 or 3 lamellate ridged projections,ridges thickly fleshy, terminating at base of mid-lobe,apex enlarged. Column subterete, ca. 2 mm, foot margindensely finely papillate; anther cap subglobose, front marginlacerate.Epiphytic on tree trunks in mountain forests; 1000–2100 m. Hainan(Bawangling), S and W Yunnan [Myanmar, N Thailand, N Vietnam].68. Dendrobium monticola P. F. Hunt & Summerhayes, Taxon10: 110. 1961.藏 南 石 斛 zang nan shi huCallista alpestris Kuntze; Dendrobium alpestre Royle(1839), not Swartz (1799); D. pusillum D. Don (1825), notKunth (1815); D. roylei A. D. Hawkes & A. H. Heller.Stems erect or ascending, to 10 cm, becoming narrowerfrom base, fleshy, current ones enclosed in leaf sheaths, withseveral nodes, internodes ca. 1 cm. Leaves distichous alongwhole stem, narrowly oblong, 5–6 cm(or more) × 3.5–4.5 mm,thinly leathery, base dilated into gibbous sheaths, apex acuteand unequally slightly bilobed; leaf sheaths loosely embracingstem, lowermost largest, uppermost smaller, sheath mouthobliquely truncate. Inflorescences 1–4, subterminal or arisingfrom upper part of current year’s leafy stems, suberect or nodding,2.5–5 cm, several flowered; floral bracts narrowly ovate,2–3 mm, acute. Pedicel and ovary ca. 5 mm, slender. Flowersspreading, white, lateral lobes of lip with purplish red stripes,disk white with purplish red stripes, column foot with purplishred spots. Dorsal sepal narrowly oblong, (5–)7–9 × 1.5–1.8(ormore) mm, 3-veined, acuminate; lateral sepals falcate-lanceolate,7–9 × ca. 3.5 mm, 3-veined, base oblique, abruptly contractedabove middle and acute; mentum broadly conic. Petalsnarrowly oblong, 6–8 × ca. 1.8 mm, 1–3-veined, acuminate; lipsubelliptic, 5.5–6.5 × 3.5–4.5(or more) mm, shortly clawed,slightly crispate at middle, 3-lobed above middle; lateral lobeserect, margin comb-shaped, apex attenuate and sharply dentate;mid-lobe ovate-triangular, margin cristate-corrugate, acute, reflexed;disk central part with 2 or 3 lamellate ridged projections,ridges thickly fleshy, extending from base of lip to base ofmid-lobe, apex slightly enlarged. Column ca. 3 mm, middle partstout, to 1 mm wide, upper part without conspicuous teeth, footca. 5 mm, margin densely finely papillate; anther cap subglobose,front margin slightly dentate.Lithophytic on rocks in mountain valleys; 1700–2200 m. SWGuangxi (Napo), S Xizang (Gyirong, Nyalam) [N India, Laos, Nepal, NThailand, N Vietnam].Material of this species has been named as Dendrobium eriiflorumGriffith (Orchids China, 155. 1998).69. Dendrobium compactum Rolfe ex W. Hackett, Gard.Chron., ser. 3, 36: 400. 1904.草 石 斛 cao shi huDendrobium wilmsianum Schlechter.Stems cylindric, ± fusiform, 1.5–3 cm, 4–5 mm in diam.,fleshy, with 3–6 nodes, current ones enclosed in leaf sheaths,previous year’s naked stems golden yellow. Leaves 2–5, distichous,alternate, lowermost smaller than upper, oblong, 1–2.5× 0.4–0.6 cm or more, herbaceous, base dilated into sheaths,apex obtuse and unequally bilobed; leaf sheaths obliquelydrum-shaped, papery, loosely clasping; sheath mouth obliquelytruncate. Inflorescences 1–5, subterminal or lateral on upperpart of current year’s stem, erect, usually 1–2 cm, not exceedingleaves, 3–6-flowered; floral bracts ovate-lanceolate, 2–3 × ca. 1mm, 1-veined, acute. Pedicel and ovary ca. 4 mm. Flowersspreading, white, lip pale green. Dorsal sepal ovate-oblong, ca.4 × 1.8 mm, 3-veined, acute; lateral sepals obliquely triangular-lanceolate,ca. 4 × to 3.5 mm, 3- or 4-veined, base oblique,apex acute; mentum conic. Petals suborbicular, ca. 4 × 1.7 mmmargin slightly undulate, apex acute; lip suborbicular, ca. 5 × 4mm, inconspicuously 3-lobed; lateral lobes subrounded, marginfinely toothed above middle; mid-lobe broadly ovate-triangular,margin cristate-corrugate, apex mucronate; disk with fleshyridges combined by 2 or 3 lamellae, apex slightly narrowed.Column ca. 2 mm, upper part enlarged; anther cap broadlyconic, front margin slightly notched. Capsule ovoid, ca. 5 mmin diam., with 3 ribs.Epiphytic on tree trunks in broad-leaved forests; 1600–1900 m. SYunnan [Myanmar, N Thailand].70. Dendrobium sinominutiflorum S. C. Chen, J. J. Wood &H. P. Wood, nom. nov.勐 海 石 斛 meng hai shi huReplaced synonym: Dendrobium minutiflorum S. C. Chen& Z. H. Tsi, Bull. Bot. Res., Harbin 9(2): 27. 1989, not Dendrobiumminutiflorum Kraenzlin in Sarasin & Roux, NovaCaledonia, Bot. 1: 84. 1914, nor Dendrobium minutiflorumGagnepain, Bull. Mus. Natl. Hist. Nat., sér. 2, 21: 741. 1950.Stems narrowly ovoid or ± fusiform, 1.5–3 cm, with leafsheaths 4–5 mm in diam., with 3 or 4 nodes, current ones enclosedin leaf sheaths. Leaves usually 2 or 3, narrowly oblong,1.5–5.5 × 0.4–0.7 cm or wider, leathery, base dilated into leaf