白蜡树(原亚种) bai la shu (yuan ya zhong)

Fraxinus caudata J. L. Wu; F. chinensis var. acuminata Lingelsheim; F. chinensis var. rotundata Lingelsheim; F. chinensis var. tomentosa Lingelsheim; F. lingelsheimii Rehder; F. medicinalis S. S. Sun; F. rhynchophylla Hance var. huashanensis J. L. Wu & Z. W. Xie; F. sargentiana Lingelsheim; F. szaboana Lingelsheim; F. velutina Lingelsheim (1907), not Torrey (1848); F. yunnanensis Lingelsheim.

Leaflets (3-)5-7(-9), ovate, ovate-lanceolate, to lanceolate or elliptic to obovate-oblong, terminal leaflet (4-)7-10 (-12) × 2-4(-6) cm, villous beside basal part of midrib abaxially, rarely tomentose or almost glabrous, margin distinctly serrate, apex short to long acuminate; primary veins 6-12 on each side of midrib. Samara spatulate to very narrowly so, 3-3.5(-4) cm × 3.5-7(-15) mm. Fl. Apr-May, fr. Jul-Sep.

Mixed woods in montane regions; 800-2300 m. Throughout China [Korea, Vietnam]

A variable subspecies, cultivated for a long time in China for leaves to feed a species of scale insects that secretes commercial candle wax.