» & 
YUCCA. 
Yettow Rootr.—See Xantno- 
RHI‘ZA. 
Yetitow Surtran.—See AMBER- 
BO‘A. 
Yettow Vercniine.—Lathyrus 
Aphaca.—A British climbing vetch, 
with yellow flowers, only found in 
sandy soiis. 
Yettow Wort.—Chlora perfo- 
lidta.—A British annual, with glau- 
cous leaves and yellow flowers. It 
is always found in a wild state in 
tally soils, and it will seldom grow 
in gardens unless the soil be chalky, 
or of a calcareous loam. 
Yew Tree.—See Ta’xvs. 
® You'cca—Lilidcee, or Tulipicee. 
Adam’s Needle. Evergreen plants 
with leaves like the Aloe, and some- 
times a stem, or rather trunk, like 
a palm tree. Some of the species 
have been known to have a trunk 
twenty feet high, sending up every 
year five or six immense flower- 
stems, each six or eight feet high. 
In ordinary cases, however, the 
trunk is rarely more than two or 
three feet high, though the flower- 
stem frequently measures five or six 
feet. The flowers are bell-shaped, 
and generally white. The com- 
monest kinds in British gardens are 
Y. gloridsa, Y. Draconis, and Y. 
filamentdsa. All these are natives 
of North America, and are quite 
hardy in Britain; they have all; 
white flowers, and they are all Aloe- 
hike shrubs, presenting the general 
appearance shown in fig. 61, which 
was taken from a plant of Y. Dra- 
conis. Y. aldifélia, on the contra- 
ry, always forms a palm-like tree, 
from twelve to twenty feet high ; it 
is rather more tender, and its flow- 
ers are purplish on the cutside and 
white within.” All the kinds prefer 
a deep sandy soil, and they are all 
propagated by suckers. They will 
all grow close to the sea-side, and 
are therefore very suitable for the 
grounds of marine villas. They 
also produce a good effect in vases, 
Ale 
ZANTHOXYLUM. | 
Fig. 61.—Yuceca Draconis. 
on the terraced garden of an Italian 
villa, as they form an excellent sub-— 
stitute for the Agaves, so common 
in Italy, but which are too tender 
for the open air in England * 
Z. 
Z.—Several botanical names be- 
ginning with X, are occasionally 
spelled with Z. 
Za\mia.—-Cycddee.-—Very curious 
palm-like plants, with short tuber- 
cle-like stems, and long frond-like 
leaves, which are stiff and leathery, 
and stand erect round the stem. 
The remains of the footstalks of 
the old leaves, form a scaly lind of 
bark to the stem. The flowers are 
dicecious ; and the fruit is an oblong, 
erect, scaly nut, which is hard and 
bony. The species are mostly na- 
tives of the Cape of Good Hope, 
but some are found in the West 
Indies; and one, Z. spiralis, in 
New South Wales. The plants 
should be grown in very sandy 
loam, and are generally propagated 
by offsets. ‘They are very tena- 
cious of life, and when the centre of 
the stem is rotten, the scale, if plant- 
ed, will generally send up leaves, 
and become a separate’plant. 
ZANTIO XYLUM.—See XANTHO'XY- 
| Lom, 
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5 
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