HORTICULTURAL JOURNAL. 201 
consider them distinct. We put ourselves on their side, not only on account 
of their authority in such matters, but also for the interest of horticulture, 
and that long established names shall not be changed. It is, however, with 
these two groups as with others : they comprise species w^ith large and 
with small flowers, and in consequence some are precious, and others of 
value to the horticultural trader. We will pass them successively in review, 
dividing them into two groups, in the first of which we will place the 
species already introduced, and in the second those only known through 
the beautiful plates of the Flora japonica of Siebold and Zuccarini. 
INTRODUCED SPECIES OR VARIETIES. 
1. Diervilla canadensis, WiWd. D. lutea, Pursh; D. Tournefortii, Michx. ; 
Lonicera Diervilla, L. — A not very tall shrub, the stalk rather angular, 
reclining ; leaves nearly heart shaped, oblong acuminate, dentate, glabrous ; 
flowers yellow, small, axillary, appearing in May. Habitat Canada and 
the United States. 
2. D. japonica, R. Br. DO. ; D. versicolor, Sieb. k Zucc. ; Weigela 
jajtonica, Thunb. ; W. rosea, Lindl. et Hort. — This charming shrub, already 
considerably diff"used in gardens, which it ornaments so well with its hand- 
some flowers of deep or light rose, is so well known, that we need not 
describe it here. It grows on the mountains and in the valleys of Japan, 
where it is also cultivated in gardens ; it flowers in April and May. 
3. D. amabilis. Planch. W. amabilis, Hort. — A bushy shrub, like all its 
congeners : branches slightly velvety, leaves oval oblong, sharpened to an 
obtuse point, long, narrowed at the base into a short petiole, toothed 
unequally at the edges, green, smooth above, paler beneath, smooth and 
with a few very short hairs on the nerves ; flower with 5-divided calyx, 
divisions linear, equal, ovary oblong, cohering with the calyx, with two 
pointed linear bracts at the base ; corolla funnel-shaped, tapering towards 
the base, enlarging gradually for about a third of its length, then suddenly 
dilated and swelling out, presenting angles corresponding to the divisions of 
the lobes of the corolla. These latter are rather oval, rounded at the top, 
of a fresh, deep rose color; stamens five, inserted at the bottom of the 
tube of the corolla, which is velvety in this part, and to which they cohere 
for one-half or two-thirds of their length, filaments threadlike, cylindrical ; 
anthers attached to the filaments by the back, oblong, ciliate while young, 
obtuse at the summit ; style filiform, as long or a little longer than the 
stamens, terminated by a hemispherical white stigma, finely hairy ; country 
unknown. It is a question whether the D. amabilis is a distinct species, or 
