;"D. benguellensis";"D. luamensis" Plant;"Succulent herb";"Herbaceous Herb" length;"Up to 50(-60) cm";"10–17 cm" "Root system";Tuber;Tuber posture;Erect;Hanging "Leaves arrangement";Spiral;horizontal lamina;"Oblong, sub(ob)ovate, linear, elliptic, ovate";Subfalcate dimensions;"1–15×0.2–4.5 cm";"5–7×1.1.4 cm" apex;"acute to subacuminate or obtuse";"Acute and micrunate" base;"cuneate, sometimes obtuse to rounded";"asymetrical cunate and rounded" margin;"finely to rather coarsely dendate (to subcrenate) or sometimes serrulate";"Entire to coarsely dendate" surfaces;"puberulous to hirstellous or to hispidulous";"Glabrous, subspiculate, bicolorous" "lateral veins";"4–12, up to 25 pairs, often (fainly) loop connected, reticulum rather narrow";5–7 petiole;"(0-)0.1–0.2(-0.5) cm long";"1–2 mm long" stipules;"persistent, triangular to oblong, up to 5 mm long, sometimes foliaceous, puberulous";"Not observed" Inflorescences;"solitary or sometimes in pairs";solitary Peduncle;"(0.3-)0.5–2.5(-7) cm long, ca. 1–1.5 mm thick";"0.1 cm long" "minutely puberulous to hirstellous or to hispulous";glabrous receptacle;"discoid to broadly turbinate, sometimes, shallowly cup-shaped, suborbicular 0.5–2(2.5) cm in diameter";"elliptic to round, 3–4 mm in diameter, patelliform" "outside sparsely, to densely minutely puberulous to hirtellous to hispidulous";glabrous "flowering face";"(sub)orbicular, sometimes to subangular or almost elliptic, fringe up to 1 mm broad or absent";"elliptic to round" appendages;"inner (=marginal) row numerous, triangular to subulate or filiform, up to 1–5(-7) mm long, forming a (sub)crenate rim, or indistinct and the rim entire to faintly repand,";"triangular lobes, 1 mm" "outer (=submarginal) row, usually ca. 5–12 mm, less commonly more than 12, up to 23, or less than 5, down to 2, or even 0, (broadly) ligulate to filiform or sometimes subspatulate or oblong, (0.1)0.2–3.5(-8) cm long, up to 2.5 mm broad";"subspathulate, 2–3 mm long, 0.5 mm broad" "staminate flowers";"±crowed, tepals 2, puberulous with white, red-brown or almost black hairs, stamen 2, filaments ca. 0.3–0.5 mm long, slender";"few, glabrous, stamen 2, filaments ca.0.1 mm" "pistillate flowers";"several to many, free part of the perianth shortly tubular, puberulous with white, red-brown or almost black hairs, stigmas 2, filiform, ca. 0.2–0.3 mm long, equal or unequal in length, sometimes one of the stigmas strongly reduced or a single stigma";"few, glabrous, stigmas 2, filiform, ca. 0.1 mm long," Endocarp;"body tetrahedral to subglobose, ca. 2 mm long, tuberculate, pale brown";"Not observed"