1. Porpax ustulata (E. C. Parish & H. G. Reichenbach) Rolfe, Orchid Rev. 16: 8. 1908.
盾柄兰 dun bing lan
Eria ustulata E. C. Parish & H. G. Reichenbach, Trans. Linn. Soc. London 30: 147. 1874; Pinalia ustulata (E. C. Parish & H. G. Reichenbach) Kuntze.
Pseudobulbs flattened globose, 4-5 × 5-6 mm, covered with strongly reticulate-veined sheaths; reticulate veins convex, with meshes ca. 5 mm in diam. Leaves 2, developing at anthesis; leaf blade obovate, elliptic, or suboblong, 1.5-2.5 × 0.8-1.4 cm, 13-15-veined, base contracted into a short petiole, margin thinly ciliate, apex rounded or slightly acute; petiole 2-4 cm. Inflorescence arising between 2 apical leaves, very short, 1- or 2-flowered; floral bracts small. Flowers suberect, red, 6-7 mm; pedicel and ovary 2-3 mm, pubescent. Dorsal sepal ovate, 6-7 × 3-4 mm, abaxially pubescent, connate to lateral sepals shortly at base, acute or shortly acuminate at apex; lateral sepals fused with each other at 1/2-2/3 their length, base dilated forming a subglobose sac, abaxially hairy. Petals spatulate, 5-6 × ca. 2 mm, margin ± erose, adaxially with faint small silvery-white dots; lip recurved, suboblong-lanceolate, ca. 2 × 0.7 mm, base contracted, distal margin shortly fimbriate, apex cuspidate. Column very short, foot short. Capsule broadly obovoid, ca. 3 × 3.5 mm; fruiting pedicel 4-5 mm. Fl. and fr. Jun.
Epiphytic on trees in valley forests; 600-1500 m. S Yunnan [Myanmar, Thailand].