Tree 6-20 (35) m tall, the trunk straight, up to 60 (80) cm in diam, branch-less for ca 1/2-2/3 of its length, the branches ascending and forming a spreading crown, the bark grayish and smooth, the branchlets softly ferruginous-tomentel-lous. Leaves opposite, the petiole canaliculate above, 5-8 mm long, softly fer-ruginous-tomentellous, the stipules 1-2 mm long; blade narrowly elliptic-oblong to narrowly elliptic, attenuate-cuneate at the base, acuminate to caudate-acuminate at the apex, the acumen up to 1.5 mm long and shortly mucronulate, the margins subrevolute, 5-12.5 (16) cm long and 2-4.5 (5) cm wide, the upper surface almost shining, glabrous and with the midvein impressed, the lower surface dull, fer-ruginous-puberulous, the indumentum especially dense along the prominent mid-vein and lateral veins. Inflorescences terminal and axillary, elongate-cylindrical, many-flowered, the cincinni 1-5-flowered, the rachis as the peduncles and pedicels softly ferruginous-tomentellous, the peduncles 2-4.5 mm long, the pedicels slender and up to 4-5 mm long. Flowers with the calyx reddish-orange, the spurred lobe fleshy, cucullate at the apex, 7-9 mm long (without spur) and ca 4 mm wide, sparsely and minutely puberulous at the base, the spur strongly arcuate, about as long as the lobe, sparsely and minutely puberulous, the other lobes circular and subacute at the apex, ca 1-1.5 mm in diam, ciliolate; petals 3, light yellow to orange-yellow, oblong-spatulate, 9-10 mm long, the center one ca 3.5 mm wide and ? cucullate at the apex, the lateral ones ca 2-2.5 mm wide, the apex ciliate; stamen 7-9.5 mm long, the filament 1.5-4 mm long, the anther basifixed, oblong, obtuse, 4-5.5 mm long, sparsely hairy at the base; staminodes ligulate, ca 1 mm long; style cylindrical, 6.5-10 mm long, glabrous, the stigma lateral. Capsule obtuse or subretuse at the apex, 1.7-2.5 cm long, verruculose, the seeds up to 2.3 cm long (wing included), with the limb tomentose.