COTONEASTER. 
Cotoneaster.—For the rock-garden especially valuable are the 
neat little leaved bushes, C. microphylla, C. thymifolia, and the new 
spraying C. perpusilla ; but for hugging the rocks and robing them in a 
close-fitting coat of sprays and leaves and berries, especially admirable 
are the evergreens, C. prostrata, C. humifusa, C. pyrenaica (or C. 
congesta), C. glacialis, and the deciduous beautiful C. adpressa, all of 
them merely requiring to be stuck in and left alone. See Appendix. 
Cottila.—The only Cotula which convenience may leave under 
this name (for they are all now Leptinella), is a most useful New 
Zealander, C. squalida, which has been unkindly named, for in fact 
it forms a peculiarly neat and beautiful carpet of minute, ferny, ever- 
green foliage, flat to the ground, and excellently adapted to carpet the 
ground for choice bulbs, or make a floor by the water-side ; it will 
grow with rampant ease in almost any conditions, and by the edge 
of the pond positively flops over and in, making masses of fine white 
rootage that go on waving in the water like the hair of an elderly 
mermaid. The flowers, it is true, might justly be called squalid ; but 
they are so utterly negligible—little heads of dinginess in summer, on 
stems of an inch or so, that really need not be considered one way or 
another, and in no way spoil the lawn one is treading, by calling any 
attention to themselves. (It soon becomes a wicked weed.) 
Cotyledon (Echeveria).—The only generallyand soundly hardy 
species is C. Purpusii, from the Californian Sierra Nevada. This 
should be planted in a tight, well-drained crevice, in a sunny, dry, and 
sheltered exposure, where it will be very pretty with its neat and 
succulent rosette of glaucous white-bloomed leaves, while its spikes 
of blossom recall those of a red-and-yellow Lachenalia. 
Cousinia, weedy, coarse, thistlish, woolly-headed biennials from 
the Himalaya, of no attractiveness for us. 
Cowania mexicana is a pinnate-leaved Rosaceous shrub or 
shrubling, from 4 inches high to as many feet, very branchy, set with 
those rose-like leaves, dark green, and hoary-white underneath, and 
then with large flowers of bright yellow. The bark has a way of 
shredding from the trunks, and the plant, being found in Utah and 
Colorado, should have a light, well-drained place in good soil. 
Crambe cordifolia is a vast perennial cabbage about 5 feet 
high, but more across, that fills the air with a spray of small white 
blossom all the mid-summer, above that mound of enormous foliage. 
C. orientalis has the same habit, but larger blossoms, as also has C 
Kotschyana ; C. juncea from Spain is smaller; C. tatarica is notably 
handsome with blue-glaucous leafage, and C. aspera, rough with hairs, 
has also its ei like all these giant cabbages, in deep soil, on high 
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