This name is a synonym.
Corylus tubulosa var. purpurea (Loudon) Spach, Ann. Sci. Nat., Bot., sér. 2, 16: 107 (1841).
* Corylus avellana var. purpurea Loudon, Encycl. Trees Shrubs: 922 (1842).
Corylus atropurpurea Booth, Nursery Cat. (Flottbecker Baumschulen Hamburg) 1845: 45 (1845).
Lopima atropurpurea (Booth) Dochnahl, Sichere Fuhr. Obstkund.: 49 (1860), opus utique oppr.
Corylus tubulosa var. atropurpurea (Booth) A.DC. in A.P.de Candolle, Prodr. 16(2): 132 (1864), nom. superfl.
Corylus maxima f. atropurpurea (Booth) Dippel, Handb. Laubholzk. 2: 130 (1891), nom. superfl.
Corylus maxima f. purpurea (Loudon) C.K.Schneid., Ill. Handb. Laubholzk. 1: 149 (1904).
Corylus maxima var. purpurea (Loudon) Rehder, Man. Cult. Trees: 154 (1927).
* Basionym/Replaced Synonym