258 GREEN-HOUSE — REPOTTING. [March. 
very beneath. W. longifolia is similar ; both have small sil- 
very-white flowers, and are easily cultivated. (Soil No. 2.) 
Witsenias, four species. 11'. corymbbsa is a plant that has 
stood in high estimation ever since it was known, but, unfor- 
tunately, there is a very inferior plant. Aristea cyanea got 
into our collections under that name. The panicles of W. 
corymbbsa are quite smooth ; those of Aristea are hairy, 
which is itself sufficient to detect them ; but otherwise the 
appearance of W. corymbbsa is much stronger and more erect 
growing, not inclining to push at the roots so much as Aris- 
tea. The foliage is lanceolate and amplexicaule, the leaves 
having much the nature and appearance of Iris. The plant 
is of easy culture, and blooms from July to November; colour 
line blue. W. ramosq is a very fine species, similar to the above ; 
flowers yellow and blue; plant branching. (Soil No. 8.) 
Yucca aloefdlia, and its beautiful variety varicgafa, are de- 
sirable plants. They do not bloom till they have grown to 
considerable size ; but still they make a decided contrast 
among other plants ; the flowers are white and produced on 
terminal spikes. (Soil No. 11.) 
Zamias, about twenty species, eight of which belong to 
this compartment. The foliage is greatly admired, and is in 
large fronds, with oblique, lanceolate leaflets. Several of 
them glaucous. They bear heads of flowers of a brown co- 
lour in the centre of the plants, very like large pine cones. 
Z. hbrrida, the finest ; Z. piingens, Z. spiralis, and Z. 
latifbUa, are the most conspicuous. They must be kept in 
the warmest part of the green-house ; and give them large 
well-drained pots, watering sparingly during winter. They 
are imported from the Cape of Good Hope. (Soil No. 11.) 
All the plants herein named requiring to be drained, in pre- 
paring the pots, place first a piece of broken pot, oyster- 
shell, or any similar substitute, with the convex side on the 
hole of the pot, and then put in a few, or a handful (accord- 
ing to the size of the pot) of shivers of broken pots, or 
round gravel about the size of garden beans. Those that 
we have mentioned in this Repotting, as to be done in this 
or beginning of next month, is not intended to apply to 
plants in general, large and small, but to those that are 
young, and require encouragement, or to those that were not 
shifted last autumn. The roots must not be disturbed, but 
the ball turned out entire ; and put as much earth as will 
