132 ALPINE PLANTS 
CONVOLVULUS.—Totally distinct from the familiar annual 
types of this genus, there are a number of perennial dwarf 
and compact species that are particularly charming on 
account of their silvery foliage. C. mauritanicus has 
elegant growth and violet blossoms, which it continues 
to bear until well into autumn. OC. cantabrica has 
blossoms of a pleasing shade of pink, and C. spithameus 
has white flowers and grey foliage. 
CoRYDALIS.—For beauty of foliage and uncommon 
appearance of blossoms, some of the fumitories are 
among the finest plants for shady, moist situations. They 
are also particularly good plants for pot culture, giving 
to the alpine house a lightness and elegance usually 
associated with ferns. The plants make clumps that 
may be divided, the best season being spring, when young 
growth is starting. C. angustifolia is a white-flowered 
species of distinct character. C. bracteata has pale yellow, 
and C. bulbosa purple flowers. C. thalictrifolia is a large- 
flowered bright yellow, with beautiful fernlike leaves, 
and other useful varieties are C. capnoides, C. nobilis, 
and C. tuberosa. 
It is advisable to afford the protection of a few stout 
bracken fronds, heather twigs, or similar material, as 
the young growths of Corydalis are very succulent, and 
liable to injury by frosty winds. 
CycLAMEN.—It is a remarkable fact that out of perhaps 
a dozen and a half or a score of species and varieties of 
hardy Cyclamen, we may select enough that produce their 
flowers at various seasons to ensure that our gardens shall 
have at least a few cyclamen blossoms every month in 
