From the Greek penta — five, and linon — linen, application obscure.
Lianas, evergreen; latex white. Stems woody, without spines. Leaves opposite, stalked; blade well developed; colleters absent at base. Inflorescence terminal or axillary, cymose. Flowers scentless, stalked. Corolla bellshaped; tube cylindrical; lobes convolute in bud, overlapping to the right. Corolline corona absent. Stamens enclosed, attached at base of upper expanded part of throat, sticking to style head, anthers with long filiform apical appendages. Disk of 5 lobes. Fruit of 2 slender follicles, of separate carpels, dehiscent along ventral suture. Seeds numerous, flattened, oblong, not winged, with a beaked coma at the micropylar end.
One species is commonly cultivated. Frost-sensitive.
Liana; leaves opposite; corolla with lobes overlapping to the right in bud, yellow; anthers with long, filiform apical appendages.
2 species in Florida USA, C America and West Indies.
Woodson (1936a), Hansen & Wunderlin (1986).
Source: (2002). Apocynaceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.