Spathoglottis arunachalensis - Arunachal Ground Orchid

Arunachal Ground Orchid is a newly discovered (2020), but critically endangered (possibly extinct) orchid species with beautiful yellow flowers. It differs from its closely allied species, Spathoglottis ixioides by its 20-30 cm long inflorescence (vs. 8-16 cm long), 1.8-2 cm across flowers (vs. 2-3 cm across), presence of sparse minute hairs on inner surface of sepals, petals and midlobe of lip (vs. hairless on inner surface), 9-10 mm long, 3-veined sepals (vs. 16-22 mm long, 5-6-veined), 10-11 mm long petals (vs. 16-19 mm long), petals rounded at tip (vs. blunt at tip), 7.5-8 mm long lip (vs. 14-18 mm long), lateral lobes yellow and with reddish-purple markings inside (vs. yellow with small purple spots at base), claw of midlobe without ears (vs. claw of midlobe with 2 pointed ears at base), kidney-shaped or kidney-shaped to flabellate midlobe (vs. obheart-shaped or obovate), midlobe wavy along margins (vs. entire margins), raised ridges of lip spreading, white, narrowly long rectangular, upper surface verrucose (vs. ridges erect, yellow, elongate, rounded-blunt, not verrucose). As of now, Arunachal Ground Orchid is is only found in Arunachal Pradesh.