1. Dioscorea orientalis (Thiébaut) Caddick & Wilkin
Basionym = Tamus orientalis Thiébaut., Bull. Soc. Bot. France 81: 119. 1934.
– Holotype: Lebanon. Between Batroun and Saïda, January 1933,Thiébaut s.n. (P00301666).
Perennial herb, glabrous. Stems simple or little branched. Leaves ovate, acuminate, cordate at the base of up to 56 × 48 mm, petiole with glandular base. Flowers sessile, in axillary spikes, hanging 1–23 (male), 1–4 (female) flowers. Whitish purple (i.e., including a range of shades of purple) perigonium; six lobes, recurved ovals. Six stamens, three stigmas and six naked filaments (female). Bracteoles 1–2 widely ovate, with final peak, adpressed perigonium, with a hull in the outer surface. Fleshy fruit, oblong, 7–11 × 6–10 mm, red at maturity. Pollen grains (Supplementary Data Figure S8) with two apertures with longer axis up to 40 µm and shorter axis up to 30 µm. Perforated with 1.9 perforations per µm and perforation size up to 0.85 µm, with spines. Eastern Mediterranean region. 2n = unknown.