Epiphytic. Stems woody, long about 2 to 3 feet, pendulous. Leaves coriaceous, keeled, unequally bilobed, 10 to 15 cm long. Raceme long as the leaves. The peduncle and rachis slender. Flowers arranged in distance of 2 to 3 cm, floral bract broad. Sepals unequal, oblong to oblanceolate, blunt. Petals smaller than the sepals, oblong and acute. Lip shorter than the petals, shortly clawed, the blunt apex with a large papilla. Spur recurved, blunt and cylindric between the papilla and the base. Sepal and petals are yellow with dark brown markings. The lip yellow has dark pink lines and auricles with bright pink blotches.
After Sir George King and Robert Pantling described this species in their monumental work, “The Orchids of the Sikkim-Himalayas”, published in the year 1898, several publications came up with the descriptions of this species. However, no photographs were made available by any of the other authors, pointing to the conclusion that this plant was not located by anyone from the wild. Hence, I put extra efforts to locate this plant. Sir George King and Robert Pantling mentioned their find from “Bhotan near the Sikkim frontier in the Rumpti Valley at a low elevations”, prompted me to survey low altitude areas of the region in the early monsoon days. After several weeks only, a couple of plants with much similarity to the descriptions of Sir George King and Robert Pantling were found. However, it took another three months to confirm (by theoretical research) the same as Arachnis labrosa var. labrosa, by that time it bloomed thus confirming my efforts. Thus able to document the species for the first time in flower from the region.