Alnus intermedia Schrad. ex Regel species synonym

Alnus incana var. glauca (Aiton) Willd. variety heterotypic synonym

Alnus rugosa hort. ex Regel, 1868 species synonym

Alnus americana (Regel) Czerep. species heterotypic synonym

Alnus incana f. acutiloba (W.D.J.Koch) Hallier form synonym

Alnus rugosa hort. species homotypic synonym

Alnus incana subsp. pendula-nova de Bom ex Schelle subspecies synonym

Alnus incana f. bolleana Schwer. form synonym

Alnus incana var. acutiloba W.D.J.Koch variety synonym

Alnus glutinosa subsp. kolaënsis (N.I.Orlova) Á.Löve subspecies synonym

Alnus incana var. pendula (Callier) Rehder variety synonym

Alnus incana var. pinnatifida Wahlenb. variety synonym

Alnus incana subsp. vulgaris Regel subspecies synonym

Alnus incana var. nana Brenner variety synonym

Alnus incana f. bipinnatifida Cajander form synonym

Alnus incana subsp. pendula (C.K.Schneid.) Asch. & Graebn. subspecies synonym

Alnus incana f. laevior Brenner form synonym

Alnus incana f. angustissima Holmb. form homotypic synonym

Alnus incana var. intermedia Brenner variety synonym

Alnus incana subsp. laciniata (Gaudin) Regel subspecies synonym

Alnus incana f. sublaevis Brenner form synonym

Alnus incana var. bipinnatifida Brenner variety synonym

Alnus incana subsp. borealis Norrl. subspecies synonym

Alnus incana subsp. virescens Wahlenb. subspecies synonym

Betula alnus subsp. rugosa Du Roi subspecies synonym

Alnus incana var. incana variety accepted

Alnus incana var. emersoniana (Fernald) P.D.Sell variety synonym

Alnus incana f. americana (Regel) P.D.Sell form synonym

Alnus glutinosa subsp. rugosa (Du Roi) Regel subspecies synonym

Alnus incana f. laceratifolia P.D.Sell form synonym

Alnus incana f. emersoniana (Fernald) P.D.Sell form synonym

Alnus incana subsp. acuminata Regel subspecies synonym

Alnus incana var. hypomalaca (Fernald) P.D.Sell variety synonym

Alnus incana f. aurea Dippel form synonym

Alnus borealis (Norrl.) C.Regel species synonym

Alnus rugosa var. occidentalis (Dippel) C.L.Hitchc. variety synonym

Betula incana var. angulata Aiton variety synonym

Alnus incana var. angulata (Aiton) Willd. variety synonym

Alnus incana var. ovata Regel variety synonym

Betula incana var. glauca Aiton variety synonym

Alnus incana var. virescens Wahlenb. variety heterotypic synonym

Alnus incana var. laciniata Gaudin variety synonym

Alnus incana var. tomophylla (Fernald) Rehder variety synonym

Alnus incana f. pinnata (Lundmark) H.J.P.Winkl. form synonym

Alnus incana f. pinnatifida Dippel form synonym

Alnus incana f. rubra Palmén form synonym

Alnus incana var. acuminata (Regel) Regel variety synonym

Alnus incana var. pendula (C.K.Schneid.) Bean variety synonym

Alnus incana f. microconus (Neuman) Callier form synonym

Alnus rugosa var. tomophylla (Fernald) Fernald variety synonym

Alnus incana subsp. incana subspecies accepted

Alnus rugosa var. rugosa variety synonym

Alnus tenuifolia var. ferrugineo-tomentosa Brayshaw, 1976 variety doubtful

Alnus incana f. glabrata Brenner form synonym

Alnus incana f. angustissima Holmb. ex Hyl. form synonym

Alnus incana f. glabrescens Brenner form synonym

Alnus incana subsp. kolaensis (N.I.Orlova) Á.Löve & D.Löve subspecies accepted

Alnus kolaensis N.I.Orlova species synonym

Alnus incana f. subcordifolia Callier form synonym

Alnus languinosa Gilib. species synonym

Alnus incana var. intermedia (Schrad. ex Regel) Nyman variety synonym

Alnus incana var. argentata Norrl. variety synonym

Alnus incana f. microcarpa Callier form synonym

Alnus incana f. pendula C.K.Schneid. form synonym

Alnus incana f. blyttiana Callier form synonym

Alnus incana var. confusa Brenner variety synonym

Alnus incana var. pinnata (Lundmark) Willd. variety synonym

Alnus incana f. dubia Callier form synonym

Alnus incana var. pseudospuria Callier variety synonym

Alnus tenuifolia f. incisa W.A.Weber form synonym

Alnus incana f. argyrophylla Callier form synonym

Alnus incana f. incisa (W.A.Weber) W.A.Weber form synonym

Alnus incana var. borealis Norrl. variety synonym

Alnus incana f. monstrosa (Späth) Dippel form synonym

Alnus incana var. tomentosa A.Blytt variety synonym

Alnus minor (Tourr.) Chiov. species synonym

Alnus argentata var. pinnatipartita (Norrl.) Tzvelev variety synonym

Alnus incana var. parvifolia Regel variety synonym

Alnus incana var. virescens S.Watson variety heterotypic synonym

Alnus incana f. subargentata Callier form synonym

Alnus incana var. obtusifolia Callier variety synonym

Alnus incana var. sericea Christ variety synonym

Alnus incana f. subsericea Callier form synonym

Alnus incana var. arcuata Skarman variety synonym

Alnus incana f. cordifolia Callier form synonym

Alnus incana var. microjula Grütter variety synonym

Alnus incana f. oxyloba Callier form synonym

Alnus incana f. pinnatisecta Callier form synonym

Alnus argentata (Norrl.) Tzvelev species synonym

Alnus incana f. pallida Dippel form synonym

Alnus incana f. flavescens Callier form synonym

Alnus incana var. bornmuelleri Callier variety synonym

Alnus incana f. subcordata Callier form synonym

Alnus incana f. pinnatipartita Norrl. form synonym

Alnus incana var. glaucophylla Callier variety synonym

Alnus incana var. ovalifolia T.Durand & Pittier variety synonym

Alnus incana f. tortuosa Nitz. form synonym

Alnus incana f. acuminata (Regel) Regel form synonym

Alnus incana f. crataegifolia Callier form synonym

Alnus incana var. argentea Norrl. ex Gürke variety synonym

Alnus alnus (L.) Britton species synonym

Alnus incana var. hypochlora Callier variety synonym

Alnus incana f. microphylla Callier form synonym

Alnus tirolensis Nyman species synonym

Alnus incana var. microconus Neuman variety synonym

Alnus incana var. subrotunda Callier variety synonym

Alnus incana var. ovalis Callier variety synonym

Alnus alisoviana Mandl species synonym

Alnus incana var. glabra A.Blytt variety synonym

Alnus incana var. orbicularis Callier variety synonym

Alnus plicata K.Koch species synonym

Alnus incana f. brachyphylla Callier form synonym

Alnus incana var. oblongifrons Callier variety synonym

Alnus incana var. leptophylla Callier variety synonym

Alnus incana var. alpestris Brügger variety synonym

Alnus incana subsp. tenuifolia (Nutt.) Breitung subspecies accepted

Alnus tenuifolia var. virescens (Kuntze) Callier variety synonym

Alnus tenuifolia Nutt. species synonym

Alnus densiflora C.H.Mull. species synonym

Alnus tenuifolia var. occidentalis Callier variety synonym

Alnus occidentalis Dippel species synonym

Alnus communis Desf. ex Kuntze species synonym

Alnus incana var. occidentalis (Callier) Hitchc. variety synonym

Alnus glutinosa var. virescens Kuntze variety synonym

Alnus incana subsp. rugosa (Du Roi) R.T.Clausen subspecies accepted

Alnus rugosa f. emersoniana Fernald form synonym

Alnus incana var. americana Regel variety synonym

Alnus incana f. tomophylla Fernald form synonym

Alnus incana var. glauca (Michaux) Loudon variety synonym

Alnus rugosa f. hypomalaca Fernald form synonym

Betula-alnus glauca Marshall species synonym

Alnus serrulata var. rugosa (Du Roi) Regel variety synonym

Alnus glauca (Aiton) F.Michx. species synonym

Alnus rugosa (Du Roi) Spreng. species synonym

Alnus rugosa var. americana (Regel) Fernald variety synonym

Alnus rugosa f. tomophylla (Fernald) Fernald form synonym

Alnus canadensis Lodd. species homotypic synonym

Alnus intermedia Schrad. species homotypic synonym

Alnus incana f. arcuata Skårman form synonym

Alnus incana f. incisa Dippel form synonym

Alnus incana var. bipinnatifida Gren. & Godr. variety synonym

Alnus incana var. monstrosa Späth variety synonym

Alnus canadensis Lodd. ex G.Don species synonym

Alnus incana subsp. pendula-nova de Bom subspecies homotypic synonym

Alnus incana f. coccinea Callier form synonym

Alnus incana var. vulgaris Spach variety synonym

Betula palustris Salisb. species heterotypic synonym

Betula alnus L. species synonym

Betula pinnata Lundmark species synonym

Betula incana var. minor Tourr. variety synonym

Betula rugosa (Du Roi) Ehrh. species synonym

Betula alnus var. rugosa Du Roi variety synonym

Alnus tenuifolia var. tenuifolia variety accepted