rosariumn.

1822 J. C. Loudon Encycl. Gardening iii. ii. iv. 916 This spot combines a villa and offices (a), a kitchen-garden (b), reserve-garden and melon-ground (c), botanic ground for herbaceous plants (d), rock-work (e), rosarium (f), aquarium (g), [etc.].

1841 Penny Cycl. XX. 158/2 They form an elegant section of flowers for the rosarium.

1869 S. R. Hole Bk. Roses 48 The Rosarium must be both exposed and sheltered; a place both of sunshine and of shade.

1959 Geogr. Rev. 49 28 There he [sc. Repton] created a cloistered monk's garden, a rosarium, a secluded dell with a grotto, and a rock garden.

1979 Country Life 14 June 1924/1 The rosarium at Lime Kiln..specialises in old and rare roses.

2002 M. Laird in M. Conan Bourgeois & Aristocratic Cultural Encounters in Garden Art 254 In choosing to design the Rosarium in the shape of a flower, he established the radial prototype for all later rose gardens that have fulfilled the promise.