TABLE. The comparison of morphological characters of B. viridipallidum, B. kanburiense, B. khaoyaiense, and B. wallichii in The review of Bulbophyllum section Tripudianthes (Orchidaceae) in the flora of Vietnam with the description of new species, B. viridipallidum

TABLE. The comparison of morphological characters of B. viridipallidum, B. kanburiense, B. khaoyaiense, and B. wallichii
B. viridipallidumB. kanburienseB. khaoyaienseB. wallichiiMedian sepal length, shape, and marginca. 5.5 mm long, ovate to broadly ovate, acuminate to attenuate, margin glabrous, sparsely hairy in apical halfca. 5.5 mm long, ovate, acute, with few hairs at apical halfca. 3.8 mm long, triangular, with few teeth on marginca. 10 mm long, narrowly triangular, attenuate, margin fimbriate, surface sparsely hairyLateral sepal length and marginca. 4 cm long, sparsely hairy with short hairsca. 2.5 cm long, glabrousca. 1.9 cm long, glabrousca. 4.5 cm long, glabrousPetal shape and indumentumtriangular, margin fimbriate, surface glabroustriangular, margin fimbriate, surface hairy at apical halftriangular, margin fringed, surface few stiff hairsnarrowly triangular, margin fimbriate, surface few stiff hairsLip indumentumapical half fimbriate along the margin, abaxial surface with sparely pilloseapical half densely ciliateabaxial surface with many tufted hairsapex densely papillose and margin and abaxial apical half finely papillose and sparely pilloseLip ornamentationadaxial surface at base with 2 rounded calli fused distally into a single central prominent longitudinal keel inflated at the lip apex into prominent half-ovoid callusno ornamentationno ornamentation2 rounded calli at the base fused into single callus covered almost the lip surface, with swollen half ovoid callus at apexColor of lateral sepalspale greenish yelloworange yellowyelloworange