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Rosa alba L. - Rosaceae - white rose (of York), Weiße Rose, Alba-Rose
Shrub, up to 2m tall, only known in cultivation (old garden rose of the Greeks and Romans); prickles irregularly set on the stems, usually hooked and uniform; leaves with 5-7 leaflets, ovate to broadly elliptic, obtuse, simply serrate, glabrous above, paler, grey-green, ± hairy beneath; flowers solitary or 3(-5) rarely more, white or rarely pale pink, simple or usually double or semidouble, rarely simple, fragrant.
http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=242345219
Duhamel du Monceau, H.L., Traité des arbres et arbustes, Nouvelle édition [Nouveau Duhamel], vol. 7: t. 16, fig. 1 (1819) [P. Bessa]
http://plantgenera.org/species.php?id_species=1259719
Rosa alba, CC BY-SA 3.0, Author: Andreas Kraska