Satyrium welwitschii Rchb.f., Flora 48: 182 (1865).
Tuber ovoid-oblong, 1 1/4 in. long. Plant stout, 2 ft. high, 4–7-leaved. Leaves oblong-lanceolate, subacute, 3–7 in. long, 1/2–1 1/2 in. broad, the two or three lower reduced to broad tubular sheaths. Racemes 2–4 in. long, dense, many-flowered. Bracts ovate, subacute, 6–10 lin. long. Pedicels 3 lin. long. Flowers violet-purple. Sepals 6–7 lin. long, odd one linear-oblong, obtuse; lateral oblong or ovate-oblong, and twice as broad, spreading. Petals united for half their length to the sepals, and similar to the odd one. Lip galeate, subcompressed, 6 lin. long, the basal third united to the lateral sepals; mouth 1 lin. broad; apex broad and apiculate; spurs linear-oblong, 3–4 lin. long. Column 3 1/2 lin. long; stigma broadly ovate, apiculate; rostellum broad, shortly bilobed, with obtuse lobes.