Small trees or shrubs, 0.3-5 m tall, lignotuberous. Branchlets appressed-sericeous or tomentose, persistent or quickly glabrescent. Leaves widely spreading, grooved below to varying extents, 1.5-8 cm long, 0.7-1.6 mm wide, glabrous or rapidly glabrescent; apex porrect, with mucro 1-3.5 mm long. Inflorescence axillary umbel of 1-6 flowers; rachis simple, 0.5-2.8 mm long, with tomentose or appressed white and/or ferruginous hairs, extending onto pedicels; pedicels 1.2-4.8 mm long. Perianth 4.2-7.2 mm long, glabrous. Pistil 8.5-12.2 mm long. Fruit 1.8-3.5 cm long, 1-3 cm wide, finely or coarsely tuberculate, obliquely ovate to broadly ovate; beak small to moderately large, sparsely pustulate or smooth; horns 1-5 mm long; valves with pale wood extending c. 3/4 way to style base. Seed 17-23 mm long, 6.5-10.5 mm wide; wing 3/4 to fully down one side only, dark blackish brown with hyaline network of minute areoles.