C.J.Saldanha, J. Bombay Nat. Hist. Soc. 71: 73 (1974)
Epiphytic herbs. Roots many, arising from base of stem, up to 100 or more cm long, 0.4–0.5 cm in diameter, sometimes flattened and closely adhering to trunk or branch. Stem with distichous leaves. Leaves 2–6, 2.5–10.0 × 0.5–2.4 cm, oblong to linear-oblong or elliptic-lanceolate, sometimes slightly falcate, articulate, sheathing at base, green or rarely mottled with purple or dark green, unequally or obtusely bilobed at apex with (S. straminea) or without a sharp median mucro in between. Inflorescence spreading or pendent, elongate or (sub)umbellate raceme with up to 20 flowers, 5–15 cm long, axillary; bracts 2 mm long, broadly oblong-ovate or ovatetriangular, acute or obtuse. Flowers c. 0.6–1.2 cm wide, resupinate, greenish to yellow, either with a solitary reddish brown spot (S. maculata (Dalzell) C.J.Saldanha), one or two violet spots (S. straminea) or without spots on sepals and petals, labellum white, often marked with pink or violet. Dorsal sepal obovate, obovate-oblong, or oblanceolate, often narrowed at base and gland-dotted, 3–5-veined, obtuse or acute at apex. Lateral sepals obovate or broadly obovate to obovate-oblong, narrowed at base (S. maculata) or not, 3–5-veined, gland-dotted (S. viridiflora (Dalzell) C.J.Saldanha) or not, obtuse at apex. Petals obovate, oblong or obovate-oblong, 3–5-veined, obtuse at apex. Labellum white, trilobed, shortly or deeply saccate at base, and immovably attached to column base, side lobes triangular, erect, sometimes connate below, narrow and recurved, midlobe entire or weakly trilobed; spur subconical, straight, 3–4 mm long, naked within or with a tuft of white hairs (S. maculata). Column 1–2 mm long, semi-terete, without a foot; anther conical, pollinia two, deeply and unequally cleft, stipe narrow, viscidium oblong, bifid; rostellum bilobed. Ovary with pedicel 3–7 mm long. Capsule 3–5 cm long, oblong or fusiform.