Rotheca quadrangulata (B.Thomas) R.Fern.

Leaves opposite decussate, ± closely spaced on the upper part of the flowering branches, sessile or very shortly petiolate, spreading; lamina mostly sessile, (3)8–22.5 × (2)2.4–10 cm, (including the narrowly tapering base), broadly elliptic to orbicular in the upper 2/3, oblanceolate or oblong-oblanceolate, sometimes subspathulate, ± long attenuate to broadly cuneate in the c. lower 1/3 or ± abruptly contracted and tapering into a ± broadly winged pseudopetiole, rounded to subcordate or semi-amplexicaul at the base, rounded to obtuse or ± acuminate at the apex, entire or serrate-dentate in the upper broader part of the leaf, teeth 12(14) on each side, up to 7 × 2.2 mm, sometimes crenulate; the blade thinly membranous, drying very dark to nearly black on the upper surface, less so beneath, usually glabrous or very sparsely pubescent above and more hairy beneath with short whitish hairs, the young terminal leaves sometimes with a floccose yellowish-brown very caducous indumentum at the base of the midrib beneath, and with scattered hairs along the midrib and the margins; leaves subtending the cymes, sessile, up to 10 × 5.5 cm, ovate-oblong, or obovate to broadly elliptic, rounded or cordate at the base, rounded or shortly acuminate at the apex, entire or serrate-dentate.