Subspecies, varieties, forms and cultivars of plants belonging to the Duvalia sulcata group

Duvalia sulcata form a very variable complex. 3 or 4 subspecies can be recognized as geographically and morphologically (to a wide extent) clearly distinct entities.

• Duvalia sulcata N.E.Br.: Flowers to 4.5 cm Ø. Annulus flat with long, white hairs. Upper side of lobes brownish red with 5 deep nerves and clavate-hairs at the base. Distribution: Yemen and Sudan.
• Duvalia sulcata subs. seminuda (Lavranos) Meve: the annulus is glabrous, and the corolla tips are hairy.
• Duvalia sulcata subs. somalensis (Lavranos) Meve
• Duvalia sulcata subs. sudanensis Plowes