Hypoxis interjecta is a tough, glabrous herb, 100–120 mm high, growing singly. Rhizome oblong, 20–60 mm x 15–30 mm, with few contractile roots arising above middle. Leaves few, 4–7, erect or semi-erect, bases overlapping in a rosette, lanceolate 40–60 x 8–20 mm, elongating to 250–400 mm in post-flowering, forming false petioles when shaded by dense grass., Inflorescence 2–4 per plant, appearing before or with emergence of leaves, corymbose noticeable when flowers more than 2, densely covered with coarse, short, white or yellow hairs. Flowering time: August–October.
Natural habitat is rocky ridges where it occurs amonst grasses and other flowering perennials.