CONVOLVULACEyE. 
221 
tain in g plants of a wide geographic range, chiefly, however, in¬ 
habitants of temperate regions, though a few are derived from 
the tropics. They are mostly climbing plants, yet a. few have 
a trailing or herbaceous habit, and a still smaller number assume 
a shrubby character. 
The species number nearly sixty, and to facilitate their descrip¬ 
tion, we shall separate them into three classes, the hardy kinds, 
or such as flourish in our climate without protection ; the green¬ 
house kinds, and such as require to be grown in a stove. In the 
first section there are ten annual species, the type of which may 
be found in the C. tricolor , or C. minor , as it is more generally 
called; this is extensively cultivated, and probably, were the 
others better known, they would receive equal attention : they 
are— siculus , blue ; pseudo-ciculus , white ; meonanthus , blue and 
yellow ; strictus , rose ; pentapetaloides , blue; undulatus , white 
and red ; Forskeelii, blue ; aqnaticus, white ; guianensis, blush : 
the last two climbers, and tricolor blue and yellow ; these only 
require to be sown in the open border where they are to flower. 
The hardy perennial species are seldom seen, though they include 
some really handsome, free-flowering plants. There are eighteen 
or twenty of this class, part are of scandent habit, among the 
most beautiful of which may be mentioned chinensis, pink ; 
Malcolmi 3 white ; hirsutus , purple and yellow; and emarginatus , 
reddish purple. Of those distinguished by a more restricted 
growth, perhaps some of the following might be added with ad¬ 
vantage to the best of ordinary collections of hardy herbaceous 
plants :— persicus , white ; Sibthorpi , blush ; saxatilis, blush ; 
dorycnium , rose ; holosericeus , striped ; terrestris> white ; im- 
perati , striped; and Cantahricus, pale red : they are all, or 
nearly all, readily increased from seed, and will grow in any soil, 
so that it appears an extraordinary thing that they have not been 
more generally adopted. 
The greenhouse species are certainly eclipsed by their more 
specious allies, the Ipomseas, yet such plants as fioridus , blush ; 
linearis, white and red; lanatus, white; and midtifidus, blush; 
are surely worth a place among the usual herbaceous occupants of 
the erection, while the climbers will not be disgraced by the ad¬ 
mission of species like eruhescens, blush ; bonariensis, striped ; 
farinosus, blush ; or canadensis , pink ; the plants of this class 
