Herb 1-3 m tall. Stem terete, finely striate, sparingly puberulent. Petiole to 5 mm long, puberulent; blade lanceolate, 5-8 x 2-2.5 cm, acuminate, subfalcate, obtuse or rounded at base, glabrous except primary vein and secondary veins, these puberulent on upper surface and primary vein white-pilose on lower surface, bearded in axils of secondary veins, cystoliths inconspicuous. Flowers secund; rachis of raceme puberulent; pedicels 2.5 mm long; bracts narrowly triangular, 2 x 0.5 mm, puberulent. Calyx campanulate, lobes subulate, 2-2.5 x 1 mm wide at base, glandular puberulent; corolla bright red, 35 mm long, slightly curved, sparingly and finely pubescent, about 3 mm in diameter at base, narrowed above ovary to 2 mm, thence gradually enlarged to 6 mm at mouth, lips about 9 mm long; style finely and sparingly pubescent. Capsule 20 x 6 mm, glabrous or with a few minute trichomes, these grandular except at extreme tip of capsule; seeds flat, white, about 5 mm in diameter, minutely roughened.
Guianas present, Southern America: Venezuela (Venezuela present)
Venezuela, Guianas, Brazil; 58 collections studied of which 8 from the Guianas (GU: 3; SU: 2; FG: 3).
In the , Bremekamp treated
Drejera as occurring in Suriname with one species: D. boliviensis Nees. Wasshausen (Novon 2: 149. 1992) transferred this species to Anisacanthus as A. boliviensis (Nees) Wassh., and designated the Orbigny specimen from Bolivia as lectotype. He noted that the remaining two syntypes (from Venezuela and Suriname) belong to A. secundus.