• Allocasuarina acuaria (F. Muell.) L.A.S. Johnson
• Allocasuarina acutivalvis (F. Muell.) L.A.S. Johnson
• Allocasuarina brachystachya L.A.S. Johnson
• Allocasuarina campestris (Diels) L.A.S. Johnson
• Allocasuarina corniculata (F. Muell.) L.A.S. Johnson
• Allocasuarina crassa L.A.S. Johnson
• Allocasuarina decaisneana (F. Muell.) L.A.S. Johnson
• Allocasuarina decussata (Benth.) L.A.S. Johnson
• Allocasuarina defungens L.A.S. Johnson
• Allocasuarina dielsiana (C.A. Gardner) L.A.S. Johnson
• Allocasuarina diminuta L.A.S. Johnson
• Allocasuarina distyla (Vent.) L.A.S. Johnson
• Allocasuarina drummondiana (Miq.) L.A.S. Johnson
• Allocasuarina duncanii L.A.S. Johnson & D. Morris
• Allocasuarina emuina L.A.S. Johnson
• Allocasuarina eriochlamys (L.A.S. Johnson) L.A.S. Johnson
• Allocasuarina fibrosa (C.A. Gardner) L.A.S. Johnson
• Allocasuarina filidens L.A.S. Johnson
• Allocasuarina fraseriana (Miq.) L.A.S. Johnson
• Allocasuarina glareicola L.A.S. Johnson
• Allocasuarina globosa L.A.S. Johnson
• Allocasuarina grampiana L.A.S. Johnson
• Allocasuarina grevilleoides (Diels) L.A.S. Johnson
• Allocasuarina gymnanthera L.A.S. Johnson
• Allocasuarina helmsii (Ewart & M. Gordon) L.A.S. Johnson
• Allocasuarina huegeliana (Miq.) L.A.S. Johnson
• Allocasuarina humilis (Otto & A. Dietr.) L.A.S. Johnson
• Allocasuarina inophloia (F. Muell. & F.M. Bailey) L.A.S. Johnson
• Allocasuarina lehmanniana (Miq.) L.A.S. Johnson
• Allocasuarina littoralis (Salisb.) L.A.S. Johnson
• Allocasuarina luehmannii (R.T. Baker) L.A.S. Johnson
• Allocasuarina mackliniana L.A.S. Johnson
• Allocasuarina media L.A.S. Johnson
• Allocasuarina microstachya (Miq.) L.A.S. Johnson
• Allocasuarina misera L.A.S. Johnson
• Allocasuarina monilifera (L.A.S. Johnson) L.A.S. Johnson
• Allocasuarina muelleriana (Miq.) L.A.S. Johnson
• Allocasuarina nana (Sieber ex Spreng.) L.A.S. Johnson
• Allocasuarina ophiolitica L.A.S. Johnson
• Allocasuarina paludosa (Sieber ex Spreng.) L.A.S. Johnson
• Allocasuarina paradoxa (Macklin) L.A.S. Johnson
• Allocasuarina pinaster (C.A. Gardner) L.A.S. Johnson
• Allocasuarina portuensis L.A.S. Johnson
• Allocasuarina pusilla (Macklin) L.A.S. Johnson
• Allocasuarina ramosissima (C.A. Gardner) L.A.S. Johnson
• Allocasuarina rigida (Miq.) L.A.S. Johnson
• Allocasuarina robusta (Macklin) L.A.S. Johnson
• Allocasuarina rupicola L.A.S. Johnson
• Allocasuarina scleroclada (L.A.S. Johnson) L.A.S. Johnson
• Allocasuarina simulans L.A.S. Johnson
• Allocasuarina spinosissima (C.A. Gardner) L.A.S. Johnson
• Allocasuarina striata (Macklin) L.A.S. Johnson
• Allocasuarina tessellata (C.A. Gardner) L.A.S. Johnson
• Allocasuarina thalassoscopica L.A.S. Johnson
• Allocasuarina thuyoides (Miq.) L.A.S. Johnson
• Allocasuarina tortiramula E.M. Benn.
• Allocasuarina torulosa (Aiton) L.A.S. Johnson
• Allocasuarina trichodon (Miq.) L.A.S. Johnson
• Allocasuarina verticillata (Lam.) L.A.S. Johnson
• Allocasuarina zephyrea L.A.S. Johnson
• Alnaster glutipes Jarm. ex Czerpek accepted as Alnus glutipes (Jarm. ex Czerpek) Vorosch.
• Alnus acuminata Kunth
• Alnus acutissima (H. Winkl.) Callier accepted as Alnus acuminata Kunth
• Alnus alisoviana Mandl accepted as Alnus incana (L.) Moench
• Alnus alnobetula (Ehrh.) K. Koch accepted as Alnus viridis (Chaix) DC.
• Alnus alnus (L.) Britton accepted as Alnus incana (L.) Moench
• Alnus alpina Vill. accepted as Alnus viridis (Chaix) DC.
• Alnus ambigua Beck accepted as Alnus pubescens Tausch
• Alnus americana (Regel) Czerep. accepted as Alnus incana (L.) Moench
• Alnus americana K. Koch accepted as Alnus serrulata (Aiton) Willd.
• Alnus arguta (Schltdl.) Spach accepted as Alnus acuminata Kunth
• Alnus aschersoniana Callier
• Alnus aurea K. Koch accepted as Alnus glutinosa (L.) Gaertn.
• Alnus autumnalis Hartig ex Garcke accepted as Alnus serrulata (Aiton) Willd.
• Alnus badensis Lange ex Regel accepted as Alnus pubescens Tausch
• Alnus balatonialis Borbás accepted as Alnus pubescens Tausch
• Alnus barbata C.A. Mey. accepted as Alnus glutinosa (L.) Gaertn.
• Alnus barbata Fr. ex Nyman accepted as Alnus pubescens Tausch
• Alnus beckii Callier accepted as Alnus pubescens Tausch
• Alnus borealis (Norrl.) C. Regel accepted as Alnus incana (L.) Moench
• Alnus borealis Koidz.
• Alnus brembana Rota accepted as Alnus viridis (Chaix) DC.
• Alnus californica (Regel) H. Winkl. accepted as Alnus rhombifolia Nutt.
• Alnus canadensis Lodd. ex Loudon accepted as Alnus incana (L.) Moench
• Alnus castaneifolia Mirb. accepted as Alnus acuminata Kunth
• Alnus cerifera Hartig ex Regel accepted as Alnus glutinosa (L.) Gaertn.
• Alnus communis Desf. ex Kuntze accepted as Alnus incana (L.) Moench
• Alnus cordata (Loisel.) Loisel.
• Alnus cordata Desf. accepted as Alnus cordata (Loisel.) Loisel.
• Alnus cordifolia Ten. accepted as Alnus cordata (Loisel.) Loisel.
• Alnus corylifolia A. Kern. ex Dalla Torre accepted as Alnus viridis (Chaix) DC.
• Alnus cremastogyne Burkill
• Alnus crispa (Aiton) Pursh accepted as Alnus viridis (Chaix) DC.
• Alnus cuneata Geyer ex Walp.
• Alnus cylindrostachya (H. Winkl.) Makino accepted as Alnus fauriei H. Lév. & Vaniot
• Alnus densiflora C.H. Mull. accepted as Alnus incana (L.) Moench
• Alnus denticulata C.A. Mey. accepted as Alnus glutinosa (L.) Gaertn.
• Alnus dimitrovii Jordanov & Kitanov
• Alnus dioica Roxb. accepted as Aporosa octandra (Buch.-Ham. ex D. Don) Vickery
• Alnus dubia Req. ex Regel accepted as Alnus glutinosa (L.) Gaertn.