CONVOLVULACEiE. 
219 
Calonyction contains most of the night-flowering Convolvuhe; 
it has six species—the first, C. speciosum, better known as 
Ipomcea bona nox , is a stove-climbing biennial, with white flowers, 
opening towards the close of day; the second, C. Uoxburghii, 
syn. Ipomcea grandiflora or longiflora, is of similar habit, and 
has equally handsome flowers of the same colour; the third, 
C. muricatum , syn. Ip . muricata, is a stove-climbing annual, 
with purple blossoms; the fourth, C. pseudomuricatum , is a 
shrubby plant, also bearing purple flowers ; the fifth, C. grandi- 
Jlorum , or Convolvulus grandijlovum , used to be a great favourite 
in the collections of our ancestors; its large white flowers, fully 
displayed in the evening, being much admired; and the last, 
C. noctolucum, syn. Ip. noctoluca , or the true night-flowering 
Convolvulus, was generally associated with it: this also has white 
flowers, which expand in the afternoon. All this genus delights 
in a light, rich soil, with abundance of moisture and an elevated 
temperature while growing; but, when the season’s action ceases, 
they must be kept cooler and drier; indeed, the tuberose-rooted 
kinds should be reduced to a dormant state, as recommended 
for Batatas. 
Calystegia. This genus is very closely allied to Convolvulus, 
being only distinguished by the presence of bracteae inclosing 
the calyx, and by its capsule being one-seeded. There are twelve 
species, two of which, sepium and soldanella, are natives of 
Britain. The first, popularly known as the great bear-bind, is 
one of our commonest plants, flourishing in neglected hedges or 
among the bushes beside some stagnant ditch; the other is only 
found on sea-shores,—it is a much smaller plant, and has flesh- 
coloured blossoms. 0. sepium has a pale, rose-coloured variety, 
called incarnata, which, with the new and handsome C. pubescens, 
may be termed the only ornamental portion of the genus. Incar¬ 
nata was obtained from North America a considerable time back, 
but, from neglect, has become exceedingly scarce, which is to be 
regretted, as it is intrinsically beautiful; and hardy, climbing 
plants which produce a display of flowers are things by no means 
too common. A character of this kind attaches to the C. pu¬ 
bescens , a recent introduction of the Horticultural Society, through 
their collector, Mr. Fortune, who found it in China ; and, being 
liberally distributed from the Society’s garden two years since. 
