Ulmus macrocarpa var.
glabra Nie & Huang is restricted to mixed forest in the Chinese province of Heilongjang.
Description
The tree is distinguished by a "leaf blade subelliptic, smooth, with tufted hairs in vein axil, base oblique, apex acuminate to narrowly acuminate. Samara smooth, glabrous, wings thin. Fl. Apr. - May, fr. May - Jun".
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