The anthers are ovate, the styles are subulate, and the stigmas are capitate. The bracts are linear and subulate and are . The animal shows subulate tentacles, approaching at the base. The blue-green leaves are scale like, four-ranked and lanceolate to subulate. Panicle axillary, pedunculate, bracteate or ebracteate; bracts and bracteoles subulate, minute, caducous. The alternate or opposite leaves are often linear or subulate. The tentacles are slender, subulate, with eyes sessile at their outer bases. The leaves are linear, subulate or serrated and the costa is strong, percurrent or short-excurrent. Male flowers (without bracteoles) consist of 5 triangular to subulate perianth lobes, ca. The specific epithet ("subulata") refers to the subulate shape of the leaves.