HERBACEOUS PERENNIAL VINES gI 
will attain a height of ten feet. For tall screens 
(although best when trained to a solitary pole or 
pillar), C. aromatica may be used. This attains 
sixteen feet and has reddish-violet and white 
flowers, about two inches across, during July. 
For quick screen growth few climbers can sur- 
pass the Madeira vine, or climbing mignonette 
(Boussingaultia baselloides), with its long spikes 
of whitish, very fragrant flowers, which turn 
almost black before dying. This vine is a rapid 
grower, quickly attaining a height of twenty 
feet. It is tuberous-rooted, and, as the tubers 
are tender, they must be lifted in fall, stored for 
the winter, and planted out again the following 
May. The flowers, which do resemble spikes of 
mignonette, are freely produced in late summer 
and fall. Another good point in favour of the 
Madeira vine is its adaptability to dry situations. 
Few vines will out-flower the extraordinary 
ipomoea family. Ipomceas are perhaps the finest 
blooming of all plants, as they are continually 
in flower from summer until cut down by frost. 
Where a tall vine is wanted for flowers, rather 
than for very heavy foliage, Ipomea digitata, 
with its thousands of pinkish-purple blossoms, 
is admirable. This plant attains a height of 
thirty feet, but is very tender-rooted. It must 
