March."] GREEN-HOUSE REPOTTING. 267 



Witsenias, four species. W. corymbosa is a plant that 

 has stood in high estimation ever since it was known, but, 

 unfortunately, there is a very inferior plant. Jlristea cyanea 

 got into our collections under that name. The panicles of 

 W. corymbosa are quite smooth ; those of Jlristea are hairy, 

 which is itself sufficient to detect them ; but otherwise the 

 appearance of W. corymbosa is much stronger and more 

 erect growing, not inclining to push at the roots so much 

 as Aristza. 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 fine blue. W. ramosa is a very fine 

 species, similar to the above ; flowers yellow and blue ; 

 plant branching. (Soil No. 8.) 



Yucca aloefolia and its beautiful variety variegdta are 

 desirable 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.) 



Zdmias, 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 

 colour in the centre of the plants, very like large pine cones. 

 Z. horrida, the finest, Z. pungens, Z. spiralis, and Z. lati- 

 folia, 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 

 preparing 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 raise the ball within about half an inch of the rim of 



