Dendrobium lindleyi Steud., Nomencl. Bot.

Wei, Chun-Yi, Li, Ru-Yi, Wu, Yu-Wei, Huang, Ming-Zhong & Li, Ming-He, 2024, Dendrobium tetrapterum, a cryptic species in the D. lindleyi alliance (Orchidaceae; Dendrobiinae): evidence from morphological and molecular data, Phytotaxa 655 (2), pp. 209-218 : 215

Dendrobium lindleyi Steud., Nomencl. Bot. , ed. 2, 1: 490, 1840 (DHDZ)

Homotypic synonyms: Dendrobium aggregatum Roxb., Fl. Ind. ed. 1832, 3: 477, 1832, nom. illeg. [non Kunth 1816]. Callista aggregata (Roxb.) Kuntze, Revis. Gen. Pl. 2: 654, 1891, nom. illeg.

Type:— MYANMAR. Northern Rakhine State: Arracan, leg. Pierard s.n., icon. Roxburgh 1289 (holotype CAL; copy K) .

Epiphytic herbs with a creeping rhizome, slender, 2–3 mm in diam, branched. Pseudobulbs suberect, ovoid, crowded, 4.0–8.0 × 1.0–2.0 cm, more or less octangular, and as many prominent subacute ridges, loosely covered with a grey, shining, wrinkled cuticle, and with 2–4 nodes, internodes 2.0– 2.5 cm, the outer tapering. Leaf solitary, rarely two, oblong, 5.0–9.0 × 2.0–3.0 cm, base contracted, not sheathing, margin ± undulate, apex obtuse and emarginate, twice as long as the pseudobulbs. Inflorescence (to six inches long or more) laterally from the upper internode, arching, laxly several- to 20-flowered; floral bracts small, acute. Flowers orange-yellow, deepest towards the base of the lip; sepals ovate, united at their base where the two laterals form a mentum; petals ovate, broader and longer than the sepals, 20.0 × 12.0 mm, with a short claw; lip broader than long, 27.0 × 30.0 mm, entire, often emarginate; minutely pubescent in front, disk densely pubescent below middle, below middle contracted into a claw with the sides clasping column. Column streaked with red in front, with a truncate scale near base, slightly concave stigma, toothed at both sides of the anther, with a tooth-like filament. Anther bilocular, greenish; pollinia naked, terete, 4 in two pairs. (after Roxburgh 1832, Lindley 1835, Hooker 1839).

Phenology:— Flowering March, April.

Distribution and habitat:— NE India, Myanmar, Thailand, Laos, Vietnam.

Habitat and ecology: Epiphyte in seasonally dry forest, blow 1000 m elevation.

Specimens studied:— MYANMAR. Gulf of Martaban:Chappadong, Wallich 7411A (K001127306). THAILAND. Bangkok: Hui Yang (K000596580). LAOS. Khammoune: Boualapha district, Nong Seng village, Chanh Daeng mountain (17°31′11.1″N, 105°46′41.4″E), 400–600 m, 11 May 2018, AL 1070 (LE01048800). VIETNAM. Quang Tri: 2 Jul, 1924, 11069 (P00407931).