Oreopanax flaccidus Marchal

Oreopanax flaccidus Marchal, Bull. Acad. Belg. II 47:84. 1879.
Spreading shrub or tree, up to 8 m. high or more, the branchlets stout, densely paletomentose (the hairs stellate, long-stalked, many-branched) ; leaves simple, the petiole up to 12 cm. long, tomentellose, the blade papyraceous, ovate or ovate-elliptic, 20-28 cm. long, 10-17 cm. broad, rounded or broadly cuneate at the base, acuminate at the apex, entire and narrowly revolute at the margins, scabrous above (the papillae numerous, sometimes puberulent), densely stellate-tomentose beneath (the hairs slender, few-branched, stalked), the primary nerves 3 or 5, ascending from near the base, the costa conspicuous, the secondary nerves few, spreading, the veinlets usually obscure; staminate inflorescence up to 20 cm. long and broad, the branches and peduncles stellate-pubescent, the bracts lanceolate, up to 20 mm. long, soon deciduous, the peduncles 10-13 mm. long, the heads racemosely arranged, elongate-globose, 5-8 mm. in diameter, the bractlets few, ovate, ferruginous-puberulent without, the bracteoles oblong-spatulate, the flowers glabrous; calyx small; petals oblong, 1-2 mm. long; filaments up to 2 mm. long, the anthers small; style 1, carnose, up to 1.5 mm. long.
Type locality: Huitamalco, Mexico. Distribution: Hidalgo, Puebla, and Vera Cruz.

Oreopanax flaccidus là một loài thực vật có hoa trong Họ Cuồng cuồng. Loài này được Marchal mô tả khoa học đầu tiên năm 1879.