CULTURE OF BIENNIALS. 
303 
the summer prove wet, the Ipomopsis elegans, Salpiglossis Barclay - 
ana, and several others of delicate texture, are liable to perish. It 
is not unusual for the varieties of Salpiglossis, &c. to flower the 
same year they are sown, but they flower much finer when preserved 
till the following spring, by picking off the flower-buds as they ap¬ 
pear. During winter, the roots will require protection from the 
frost, either by means of a flower-pot filled with litter, or by potting 
them and setting them in a pit or frame. In all other respects, their 
treatment resembles hardy biennials. 
Greenhouse Biennials.-- These may either be sown on a hot-bed, 
as recommended in the last case, or be sown in pots in the same 
manner as tender annuals, page 112. Indeed their general treat¬ 
ment may be the same as tender annuals. They will require pot¬ 
ting in a mixture of sandy loam, peat, and leaf-mould. Although 
naturally biennial, many of these plants may be perpetuated for a 
number of years, by constantly raising them from cuttings, as in the 
Anagallis latifolia, and other species, which root immediately when 
planted under a hand-glass. Others may be propagated by a divi¬ 
sion of the root, as Arctotis argentea, Aneilema nudiflora, &c. 
Others, such as Anchusa capensis, Humea elegans, Cynoglossum 
pictum, Manulea cheiranthus, &c. &c. can only be propagated by 
seeds, which will in general ripen pretty freely. 
Stove Biennials.-— These require similar treatment to stove an¬ 
nuals, (page 113,) until they arrive at maturity. They may then 
be mixed amongst the other stove plants, and either be plunged in 
bark or otherwise, as may be found necessary. 
CHOICE SELECTION OF GREENHOUSE BIENNIALS. 
blue. high. purple. high. 
Aneilema nudiflora. 6 inches Anagallis latifolia. 1 foot 
Anchusa capensis, .. 1 foot. orange. 
Cynoglossum pictum,... 1 foot. * Manulea cheiranthus ... 1 foot 
scarlet. high. * Arctotis argentea . 1 foot 
* Humea elegans . 6 feet. * fatuosa. 2 feet 
CHOICE SELECTION OF GREENHOUSE PERENNIALS. 
scarlet. high. white. high. 
Lobelia Tupa . 8 feet Calostemma album . 1 foot 
Coburghia incarnata Oxalis pulchella. 9 in. 
yellow. blue. 
Goodenia gracilis .. li feet Lachenalia mutabilis. bin. 
Helichr'ysum herbaceum. 1 k feet Cummingia campanulata, 9 in. 
