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HYDRANGEA

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Originally appearing in Volume V14, Page 34 of the 1911 Encyclopedia Britannica.
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HYDRANGEA , a popular See also:

flower, the plant to which the name is most commonly applied being Hydrangea Hortensia, a See also:low See also:deciduous See also:shrub, producing rather large See also:oval strongly-veined leaves in opposite pairs along the See also:stem. It is terminated by a massive globular corymbose See also:head of See also:flowers, which remain a See also:long See also:period in an ornamental See also:condition. The normal See also:colour of the flowers, the See also:majority of which have neither stamens nor See also:pistil, is See also:pink; but by the See also:influence of sundry agents in the See also:soil, such as See also:alum or See also:iron, they become changed to See also:blue. There are numerous varieties, one of the most noteworthy being " See also:Thomas See also:Hogg " with pure See also:white flowers. The See also:part of the inflorescence which appears to be the flower is an exaggerated expansion of the sepals, the other parts being generally abortive. The perfect flowers are small, rarely produced in the See also:species above referred to, but well illustrated by others, in which they occupy the inner parts of the corymb, the larger showy neuter flowers being produced at the circumference. There are upwards of See also:thirty species, found chiefly in See also:Japan, in the mountains of See also:India, and in See also:North See also:America, and many of them are See also:familiar in gardens. H. Hortensia (a species long known in cultivation in See also:China and japan) is the most useful for decoration, as the head of flowers lasts long in a fresh See also:state, and by the aid of forcing can be had for a considerable periodfor the ornamentation of the greenhouse and conservatory. Their natural flowering See also:season is towards the end of the summer, but they may be had earlier by means of forcing. H. japonica is another See also:fine conservatory plant, with foliage and See also:habit much resembling the last named, but this has See also:flat corymbs of flowers, the central ones small and perfect, and the See also:outer ones only enlarged and neuter. This also produces pink or blue flowers under the influence of different soils.

The See also:

Japanese species of hydrangea are sufficiently See also:hardy to grow in any tolerably favourable situation, but except in the most sheltered localities they seldom blossom to any degree of perfection in the open See also:air, the head of blossom depending on the uninjured development of a well-ripened terminal bud, and this growth being frequently affected by See also:late See also:spring frosts. They are much more useful for pot-culture indoors, and should be reared from cuttings of shoots having the terminal bud plump and prominent, put in during summer, these developing a single head of flowers the succeeding summer. Somewhat larger See also:plants may be had by nipping out the terminal bud and inducing three or four shoots to start in its See also:place, and these, being steadily See also:developed and well ripened, should each yield its inflorescence in the following summer, that is, when two years old. Large plants grown in tubs and vases are fine subjects for large conservatories, and useful for decorating See also:terrace walks and similar places during summer, being- housed in See also:winter, and started under See also:glass in spring. Hydrangea paniculata See also:var. grandiflora is a very handsome plant; the branched inflorescence under favourable circumstances is a yard or more in length, and consists of large spreading masses of crowded white neuter flowers which completely conceal the few inconspicuous fertile ones. The plant attains a height of 8 to ro ft. and when in flower late in summer and in autumn is a very attractive See also:object in the shrubbery. The See also:Indian and See also:American species, especially the latter, are quite hardy, and some of them are extremely effective.

End of Article: HYDRANGEA

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