Vasilis Teodoridis:
Juglandaceae | Engelhardia
1. Engelhardia roxburghiana Wallich; Pl. Asiat. Rar. 2: 85. 1831.
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Alfaropsis roxburghiana (Wallich) Iljinskaja; Engelhardia chrysolepis Hance; E. fenzelii Merrill; E. formosana Hayata; E. roxburghiana f. brevialata W. E. Manning; E. spicata Leschenault var. formosana Hayata; E. unijuga Chun ex P. Y. Chen.
Trees to 30 m tall. Leaves even-pinnate; 1-25 cm; petiole 1-8 cm; glabrous; rachis glabrous; leaflets 2-10; entire; petiolule 2-15 mm; blade elliptic-lanceolate to long elliptic; 4.5-14 x 1.5-5 cm; abaxially glabrous or puberulent; base oblique; apex acuminate or shortly acuminate. Nutlets globose; 3-5 mm; glabrous; wings glabrous; middle wing 1.5-5 cm; lateral wings 0.7-2.7 cm. Fl. Feb-Aug; fr. Jan-Dec. 2n = 32
Mixed broad-leaved or evergreen forests on loam; or on steep; dry slopes with sandy soil; 200-1500 m. Fujian; Guangdong; Guangxi; Guizhou; Hainan; Hubei; Hunan; Jiangxi; Sichuan; Taiwan; Yunnan; Zhejiang [Cambodia; Indonesia; Laos; Myanmar; E Pakistan; Thailand; Vietnam].
This species is widely distributed and highly variable; but the leaves; flowers; and nutlets are quite distinctive. Vegetative material can usually be distinguished by its entire; leathery; evergreen leaflets that are glabrous but coated with yellowish; peltate scales abaxially.