Liana; branchlets cylindrical, striated, without lenticels, pubescent, with interpetiolar gland fields.
Liana; branchlets cylindrical, striated, with lenticels, pubescent, without interpetiolar gland fields.
Species of Didymaea are characterized by their procumbent or climbing stems, opposite leaves with ovate, oblong-ovate, lanceolate, elliptic, or rarely linear blades, small, shallowly to deeply bilobed or geminate interpetiolar
stipules, axillary inflorescences with small, bisexual homostylous flowers with calyces reduced or absent, small, white to purple corollas with short tubes and 4-valvate lobes, 4 stamens with dorsifixed anthers, 2-locular ovaries with one axillary ovule per locule, and black, drupaceous fruits that are dimidiate and deeply bisulcate or sometimes subglobose.
Taxa without interpetiolar
stipules and conclusions.
Chamaesyce is characterized by many unusual synapomorphies: apical abortion of the main shoot and subsequent sympodial growth; interpetiolar
stipules; opposite and frequently asymmetrical leaves; and [C.SUB.4] photosynthesis (KOUTNIK, 1984, 1987).
Leaves opposite, occasionally whorled, rarely alternate, simple and entire, rarely compound, lobed or toothed; with (mainly but not exclusively Rubiaceae) or without stipules, interpetiolar
stipules or these reduced to an interpetiolar
line or colleters.