Dendrobium hookerianum Lindl., J. Proc. Linn. Soc., Bot. 3: 8 (1858) (syn: Callista hookeriana (Lindl.) Kuntze; Dendrobium chrysotis Rchb.f. ; Dendrobium fimbriatum var. bimaculosum Tang & F.T.Wang);
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Central Himalaya to China (W. Yunnan): Assam, Bangladesh, China South-Central, East Himalaya, Myanmar, Nepal, Tibet as per POWO;
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Common name: Golden Dendrobium
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Epiphytic or lithophytic herb, 80-100 cm long, erect or pendent; stems ca. 0.5-1 cm thick, terete. Leaves simple, alternate, spiral; lamina ca. 4-10 x 0.8-2.5 cm, ovate-lanceolate to narrowly oblong-lanceolate, rounded at base, acuminate at apex, entire, coriaceous. Inflorescences in racemes ca. 4-10 cm, laxly 2-7-flowered; peduncle ca. 2.5-5 cm, often spreading outward at 90° angle to stem; basal sheaths 3 or 4, overlapping, lowermost shortest, upper longest; floral bracts ovate-lanceolate, ca. 0.4-0.6 cm, apex acute; pedicel and ovary ca. 0.3-0.4 cm. Flowers spreading, thinly textured, golden yellow, disk with a purple blotch on each side; dorsal sepal elliptic-oblong, 2.4-3.5 × 0.9-1.6 cm, 7-veined, acute; lateral sepals oblong, 2.4-3.5 × 9-1.6 cm, 7-veined, base oblique, apex subobtuse or acute; mentum conic, ca. 0.8 cm; petals oblong, 2.4-3.5 × 1-1.8 cm, 7-veined, margin entire, apex subobtuse; lip suborbicular, 2-3 cm wide, adaxially densely pubescent, base shortly clawed, claw with a callus, margin compound fimbriate; column ca. 0.4 cm, upper part enlarged; anther cap conic, glabrous, front margin denticulate.
Lithophytic on rocks in mountain valleys, epiphytic on tree trunks in mountain forests; 1000-2300 m.
(Attrubutions: French Institute of Pondicherry as per India Biodiversity Portal)
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Dendrobium hookerianum from Manipur.: 2 images.
Photos of Dendrobium hookerianum from State Orchidarium, Imphal, Manipur. Photos by Thingnam Girija.
Not easy to differentiate between D. fimbriatum and D. hookerianum, but yes this looks like latter
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References:
POWO Catalogue of Life GBIF (High resolution specimens) Flora of China FOC illustration Annotated checklist of Flowering plants of Nepal Flowers of India India Biodiversity Portal Wikipedia iNaturalist IOSPE Photos