Dendrobium catenatum Lindley, Gen. Sp. Orchid. Pl. 84. 1830.黄石斛 huang shi hu

Callista stricklandiana (H. G. Reichenbach) Kuntze; Dendrobium funiushanense T. B. Chao, Zhi X. Chen & Z. K. Chen; D. huoshanense C. Z. Tang & S. J. Cheng; D. officinale Kimura & Migo; D. pere-fauriei Hayata; D. stricklandianum H. G. Reichenbach; D. tosaense Makino; D. tosaense var. pere-fauriei (Hayata) Masamune.

Stems erect or pendulous, cylindric, 3-35(-60) cm, slender, 2-7 mm in diam., sometimes to 18 mm in diam. above base, unbranched, with many nodes, internodes (0.3-)1.3-4 cm, pale yellowish green, sometimes with pale purplish red dots, pale yellow when dry. Leaves often 2-5 along upper part of stem, ligulate-oblong or oblong-lanceolate, 3-21 × 0.5-1.5 cm, papery, base slightly oblique and decurrent into clasping sheaths, margin and midvein often tinged with pale purple, apex obtuse and ± hooked, subacute, or slightly unequally bilobed; leaf sheath often with purple spots, upper margin separate from stem and open when old, with a deep green split. Inflorescences 1-3 from leafy or old leafless stems, (1-)3-8-flowered; peduncle 2-10 mm; rachis upcurved, 2-4 cm; basal sheaths 1-4, ovate-lanceolate, 3-4 mm, papery, apex acute; floral bracts pale white, sometimes tinged with chestnut, narrowly lanceolate or ovate, 3-7 mm, dry, membranous, apex obtuse or acute. Pedicel and ovary yellowish green, 2-4 cm. Flowers spreading; sepals and petals yellowish green, pale yellowish white, or white, often turning creamy yellow later, mentum white tinged yellowish green, lip white or pale yellow, with a reddish or reddish brown transverse mark, with a green or yellow basal callus, with purplish red stripes on both sides below middle, disk with a purplish red transverse spot above middle, column greenish white or yellowish green, with a purple spot on each side at apex, foot yellowish green with purplish red stripes, middle with an eggplant-purple spot, anther cap cream-colored, sometimes with a purple tip. Dorsal sepal ovate-oblong or ovate-lanceola