VIBURNUM.--When the plants are well budded the Laurustinus (_V. Tinus_) will flower throughout the winter in a greenhouse. Of those that are amenable to slight forcing the best are the common Guelder Rose (_V. Opulus sterile_), the Chinese _V. plicatum_, and _V. macrocephalum_. Treat them in the same way as the Lilac. The Guelder Rose is a delightful shrub under glass, with its wealth of ivory-white balls. It is one of the most interesting of all the things that can be brought into bloom in a greenhouse. Treat the Viburnums in the same way as recommended for the Lilacs.
WISTARIA.--It is only within the past few years that the Wistaria has been used to any extent for flowering in this way, but now it is universally admired. At the exhibitions early in the year it always attracts more attention than any other shrub grown in a greenhouse; the soft lilac colouring of the flowers is very beautiful against the tender green of the expanding leaves. The best and general way is to grow it as a standard, as the racemes hang down in graceful profusion. _W. sinensis_ is the Wistaria planted so freely against houses and pergolas, and for flowering under glass the variety _alba_ may be mentioned; it is more satisfactory than in the open garden. _W. multijuga_, which has racemes of great length, may also be tried, but _W. sinensis_ is as charming as any, and the most likely to give satisfaction. Wistarias transplant badly, hence in nurseries are usually kept in pots; therefore, for flowering under glass, permanent pot culture is the proper treatment. To obtain standards train up a single shoot till the required height is reached, then stop it, and encourage the formation of branches. When the head has reached flowering size, after the flowers are over, spur the shoots back to good eyes to keep the growth fairly compact.
JAPANESE MAPLES (_Acer palmatum_ and varieties).--The handsome foliage of the Japanese Maples forms their chief charm. When grown under glass they are very beautiful, the leaves varying greatly both in colour and shape; some almost plain, others deeply cut and almost fringe-like.
SHRUB GROUPS FOR WINTER AND SUMMER EFFECT
In the gardens of Lord Aldenham at Elstree an interesting feature is the grouping of shrubs for summer and winter effect, and some valuable notes, contributed to the _Garden_ on this subject, may be helpful to those desirous of getting the best results from both tree and shrub:--