摘 要 ：描述了蓼科一新种——密毛野荞麦（Fagopyrum densovillosum J. L. Liu），本种与细柄野荞麦（F. gracilipes(Hemsl.) Damm. et Diels）相近似，不同在于植株全体密被白色直立长毛，茎枝较粗壮，节较密集，节间较短， 叶较大，长（0.9～）1.7～6 cm，宽（0.7～）1.2～5.1 cm，阔卵形，心形，阔心形，阔卵状心形，卵形，长卵形，三角状卵形或卵状三角形，在上面具细皱纹，明显小泡状突起，叶柄较长，长 (0.5～) 2.6～7.5 cm，果实较小，长1.8～2.5 mm，直径1.5～2 mm，易于区别。
Abstract:Fagopyrum densovillosum J. L. Liu, a new species of the polygonaceae from Luojishanzhen, Puge Country, Sichuan Province, China，is described. F. densovillosum is closely related to F. gracilipes (Hemsl.) Damm. et Diels By its from bottom to top foliate stems and branches, axillary and apical Racemes, ovate-triangular or broadly ovate-triangular achenes, but differs in its densely erect-villose plants, thicker stems and branches, densely nodes, shorter internodes, broadly ovate, cordate, broadly cordate, broadly ovate-cordate, ovate, long ovate, triangular-ovate or ovate-triangular and larger leaves,（0.9-）1.7-6 cm long and （0.7-）1.2-5.1 cm wide, thin rugose and small pustulate on the surface, longer petioles (0.5-)2.6-7.5 cm long, smaller achenes 1.8-2.5 mm long and 1.5-2 mm in diameter.