There is a beautiful variegated form of this
species named Y. filamentosa variegata, and one with much narrower
leaves than the typical species, and known as Y. filamentosa
angustifolia.
Y. GLORIOSA.--The Mound Lily. United States, 1596. This is another
well-known hardy species, with long, sharp-pointed leaves, and a
handsome, much branched scape, of flowers that are each about 2 inches
deep. There are several varieties, differing 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.
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