Description from Flora of China
Magnolia rufibarbata (Dandy) V. S. Kumar; Manglietia pubipetala Q. W. Zeng.
Trees to 20 m tall, to 30 cm d.b.h. Bark grayish brown. Young twigs, vegetative buds, stipules, petioles, young leaf blades, and fruiting peduncles densely rust-colored tomentose. Stipules adnate to petiole; scar as long as 1/3-1/2 of petiole. Petiole 2-2.5 cm; leaf blade obovate-oblong, 18-24 × 7-8 cm, thinly leathery, basal ca. 1/2 gradually narrower, abaxially with dense rust-colored trichomes, adaxially glabrous, base broadly cuneate, apex caudate-acuminate. Flower buds ovoid, ca. 3.5 × 2 cm. Peduncle ca. 2.5 cm. Tepals 12; outer 3 tepals pale green, oblong, ca. 3.8 × 2 cm, rust-colored tomentose; middle 3 tepals white, ca. 3.2 × 2.3 cm, fleshy, base rust-colored tomentose; inner 6 tepals spatulate, ca. 3 × 1.6 cm, fleshy. Stamens many, red, abaxially sparsely hirsute; filaments 1-1.5 mm; connective exserted, with a ca. 1 mm triangular appendage; anthers ca. 1 cm, thecae distinct and ca. 1 mm wide. Gynoecium obovoid, ca. 2 × 1.5 cm, densely rust-colored hirsute; carpels many; ovules 5-8 per carpel. Mature fruit unknown. Fl. May.
Although the holotype of Manglietia pubipetala is conspecific with M. rufibarbata, the paratypes (T. X. Gao & D. Q. Zhu 05, Q. W. Zeng 67) are conspecific with M. zhengyiana.
Evergreen broad-leaved forests; ca. 1500 m. Yunnan (Maguan) [Vietnam].