Hypocalyptus oxalidifolius (Sims) Baill.

Slender, usually dark reddish-black branches sometimes longitudinally sul-cate, glabrous or with sparse hairs on the youngest parts (occasionally, a form on the Potteberg, with hairs on small, conical projections from the branchlet surface). Leaves: Stipules linear-subulate (sub-filiform), 1-3 mm long, attenuating, glabrous or with some hairs on basal inner parts. Petiole usually 2.5-7 mm long on the fully developed leaves, glabrous, slender, suberect. Leaflets often drooping against the petiole, obovate-circular; petiolules about 0.7 mm long or less; laminae 3-11(-14) mm long and 4-8(-9.5) mm broad, rounded to slightly retuse at apex but midrib usually ending as a little cusp less than 0.5 mm long; upper leaflet surface darkish green, distinctly canaliculate along the midvein; lower surface pale green, with prominent midvein and partly reticulate, distinct lateral veinlets; mid-vein and base of leaflets sometimes with sparse hairs. Inflorescence a short terminal raceme usually with only 2-6 flowers, but in certain forms (in the Caledon-Genadendal regions) with as many as 15 flowers. Axis glabrous or sparsely hispid. Flowers in the axils of linear-subulate, narrow bracts usually 1-3 mm long, in some forms with a lateral tooth on each side. Pedicel 3.0-6.5 mm long, rather slender, usually glabrous. Bracteoles on the outer part of the pedicel, similar to the bract, usually persistent during anthesis, 0.5-1.5 mm long. Calyx purplish, glabrous or with a few short scattered hairs, drawn backwards at base at the onset of flowering, but narrowly campanulate in bud, during anthesis appearing short, only 3 mm or usually less along the median upper line. Upper two lobes united medially to a point only about 1 mm from the apices; lower incisions deeper; lobes deltoid-triangular, the lowest median lobe 0.7-1.2(-1.5) mm long. Petals. Vexillum and alae almost white to pale purplish, apically sometimes a deeper purple, the carina with deep or dark purple apex. Vexillum blade usually extremely small and almost hood-like, but sometimes rather large (variation discussed below), (2.8-)3.0-6.0(-9.0) mm long and 2.5-6.5(-8.5) mm broad, thus generally much shorter than the other petals, with more or less flat sides at an acute angle, with subacute or seldom rounded (occasionally retuse) apex; claw extremely short, usually less than 0.5 mm, on the inner side with two closely standing, lateral callus bodies c. 0.5 mm long. Ala blades elongate, (6.7-)7.5-9.2(-10.5) mm long and 2.3-3.0(-3.6) mm broad in the somewhat widened apical part, often slightly twisted, reaching well beyond the keel; basal upper parts with oblique or transverse folds; claws 0.8-1.8 mm long. Carina blade lunate and somewhat beaked, (4.3-)5.0-6.3(-6.9) mm long and 2.2-3.2 mm] broad; claws (1.0-)1.3-2.1 mm long. Stamens: Basifixed anthers about 0.5 mm long, dorsifixed ones about 0.4 mm. Pistil: Ovary with 3-7 ovules. Fruit a rather flat, obovate-fusiform] legume, pointed at both ends, usually 13-18 x 6-8 mm in size; stipe curved] somewhat backwards; when ripe with walls pale yellowish to intensely light-1 brown, somewhat papery, firm but not very hard. Ripe seeds usually solitary in each fruit, elliptic, about 3 x 2 mm, dark brown to black.