Shrub to 2 m tall, frequently lignotuberous. Branches erect to spreading; young branches white-puberulous, with a ridge from base of leaf to subtending node. Leaves with lamina linear or oblong to narrowly obovate, 15-80 mm long, 3-7 (-10) mm wide, acute to obtuse, mucronate, sometimes hastate at base; margin slightly revolute; midrib prominent below and reticulate venation prominent above. Conflorescence 7-, 13-or 19-flowered; inner bracts moderately firm, spreading, less than half length of perianth. Flowers zygomorphic. Perianth 25-30 mm long, reddish orange or yellow, green at tip, dilated in middle, minutely pubescent outside, sometimes glutinous; adaxial suture deepest. Hypogynous glands 4, free. Ovary densely strigose; style sparsely pubescent in lower half. Fruit irregularly ovoid, 8-10 mm long, 9 mm wide; beak at one end of suture; 2 prominent, straight or curved horns at opposite end, with ridges along edges of sutures; sides mostly smooth or slightly mammillate. Seeds 2, asymmetrically cuneate, c. 8 mm long, c. 6 mm wide, with a very narrow annular wing.
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