Annual, erect, slender, 5-20 cm high. Stem slender, simple or in the upper part with erecto-patent branchlets, glabrous, leafy. Leaves alternate along the stem, sessile, very thin, ovate, subacute, c. 1 mm long and 5 mm wide, the floral leaves opposite (every pair consisting of one leaf and one bract), attenuate. Inflorescences very lax, many-flowered. Flowers sessile in the axil of the leaf-like bracts. Calyx sparsely sprinkled with glandular hairs; tube very short; segments linear, subacute, the 2 anterior ones connate into a bifid lobe. Corolla very small, rose-coloured, glabrous; tube about as long as the calyx-lobes; appendages of the throat hardly visible; segments free, the posterior ones bifid, subspathulate-oblong, up to 2 mm long, the anterior bifid equal, 1 mm long, subretuse, slightly notched at the top; labellum very small, subdeltoid, acuminate, without appendages. Column much exserted, geniculate, up to 3½ mm long. Capsule narrowly linear, 1.5 cm long.
In the forest-section Indramaju it grows in periodically moist places of grass-fields at 20-30 m, under seasonal conditions, together with the next species; locally common. Unlike S. tenellum it seems to be a species of the lowlands.
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