Shrub to 3 m. tall, the stem densely setose with stiffish reflexed hairs 4-7 mm. long; petioles similarly setose, 1-3 cm. long, the distal half occupied by a didymous long-setose formicarium; leaf-blades oblong-ovate, up to 25 cm. long and three-fifths as wide, 5-to 7-nerved, hirsutulous above, densely hirsute over the whole lower side; inflorescence compact, few-flowered; flowers 5-merous; setae of the hypanthium and exterior teeth rarely more than 3 mm. long; sepals oblong, obtuse, much exceeded by the slender exterior teeth.
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