ing in colour of foliage,
including Y. gloriosa glaucescens, with decidedly glaucous foliage; Y.
gloriosa superba, with rigid leaves and a shorter and denser flower
scape; and another with variegated leaves. Y. gloriosa recurvifolia is
usually dwarfer in the stem than the type, and more inclined to branch
than the other species, and less rigid, with recurving leaves that are
not so sharp-pointed, The flower panicle is large and very much
branched.

The Yuccas all do well if planted in light loam of good quality.

ZELKOVA.

ZELKOVA ACUMINATA (_syns Z. japonica_ and _Planera acuminata_).--Japan.
This resembles very nearly our common Elm in appearance, and being
perfectly hardy is to be recommended for planting in this country.

Z. CRENATA (_syns Planera crenata_ and _P. Richardi_).--Zelkova Tree.
Western Asia to Mount Caucasus, 1760. This is a handsome, large growing
tree, with oblong deeply-crenated leaves, and small and inconspicuous
flowers. For avenue planting or as a standard specimen this is a
valuable tree, being quite hardy, and of free and quick growth. P.
crenata pendula is a good weeping form, and worthy of culture.

Z. CRETICA.--Crete. A pretty small growing bush or tree of about 20 feet
in height, with crenate, leathery, dark green leaves, which are usually
fully an inch in length. The leaves are hairy, and the twigs, too, are
thickly covered with short grey hairs.

ZAUSCHNERIA.

ZAUSCHNERIA CALIFORNICA.--Californian Fuchsia, or Humming Birds'
Trumpet. California and Mexico, 1847. A small-growing, densely-branched
shrub, with linear-lanceolate silvery pubescent leaves, and bright red
or scarlet tubular flowers, with a long, slender style resembling some
of the Fuchsias. It is a pretty and distinct Alpine shrub, and not being
perfectly hardy should be assigned a rather warm and sheltered position.

ZENOBIA.

ZENOBIA SPECIOSA (_syn Andromeda speciosa_ and _A.
cassinaefolia_).--South United States, 1800. This is a distinct and
pretty hardy species, a native of swampy low-lying districts. It grows
about four feet high, and bears pure white, bell-shaped,
Lily-of-the-Valley like flowers in great abundance during the summer. In
too dry situations it becomes sparse of foliage and unhappy, but grows
and flowers freely in light, peaty soil. Z. speciosa pulverulenta is a
very desirable variety, the whole plant, stems, foliage, and flowers,
being of a pleasing light gray or white colour. Individually the