195 
COLLINSIA BICOLOR. 
CLASS. 
DIDYNAMIA. 
(two-coloured COLLINSIA.) 
NATURAL ORDER. 
SCROPHULARIN^. 
ORDER. 
ANGIOSPERMIA. 
Generic Character Calyx five-lobed, persistent, inferior. Corolla monopetalous, five-parted. Capsule 
two-valved, bifid. 
Specific Character. — A hardy annual, growing about eighteen inches high, iea^^es lanceolate, sinuated, 
and smooth, of a dark green colour. Flowers numerous, in whorls. Corolla of four lobes, the 
two upper ones nearly white, the two lowermost of a fine deep blue, throat white. Stamens four, 
united, equal. Style filiform. 
This is another of the many beautiful hardy annuals sent to the Horticultural 
Society of London, by the late Mr. David Douglas, 
from California. 
The drawing was taken from a plant which flowered 
beautifully in His Grace the Duke of Devonshire's 
collection, at Chiswick, about May last. 
In the Botanical Register, page 1734, Dr. Lindley 
gives the following accurate hints on this very hand- 
some plant. " It grows from a foot to a foot and a half 
high, and produces its pretty two-coloured blossoms most 
copiously in May and June, when it has been sown the 
previous autumn ; if sown in May, it will flower in 
August and September." 
We are enabled to give the following hints from 
our own observation. When sown in the autumn, 
where the plants are intended to produce their flowers 
the succeeding spring, nothing can surpass the richness 
its masses of cheerful blue flowers present ; we have 
observed it to be almost universally the case with annuals 
coming from this part of the world (North America), 
that if allowed to shed their seeds where they are to re- 
main, or be sown very thick in autumn, the efl'ect is very 
