STOCKS 
47 
propagation the crowns are separated early in the year; or the fleshy 
rootstock may be cut into short lengths, and potted in sandy loam. 
They will soon send out fresh root-fibres and leaves. 
Description of A portion of the flowering-stem, with a few leaves, of 
Plate 21. Dicentra spectabilis are here represented of the natural 
size, giving side and edge views of the buds and flowers in various stages. 
In the smallest of the buds the sepals will be seen still attached. Fig. 1 
has had half of each petal cut off to show the interior of the flower and 
the arrangement of the organs. 
Corydalis and Fumaria are other genera of the Order Fumariacre, 
which resemble the genus Dicentra in the character of their foliage and 
the general structure of their flowers, which, however, are smaller. 
Corydalis differs from Dicentra in having but one of its outer petals 
spurred or inflated. They are mostly yellow-flowered. One species, 
C. clavicidata, is a native of Britain, and two others— C. lutea and C. 
solida —are naturalised, the descendants of garden escapes. 
0. nobilis (noble), from Siberia, is probably the best in cultivation. 
It is less than a foot in height, with long-spurred yellow flowers, which 
appear in May. A moist, shady nook at the foot of rock-work suits 
this speciea 
C. solida (massy), 6 inches, is also a hardy species that likes a moist 
situation; flowers rosy purple, in one-sided racemes; April and May. 
STOCKS 
Natural Order Cruciferal Genus Matthiola 
Matthiola (named after Dr. P. A. Matthioli, an Italian botanist, 1500- 
1577). A genus of about thirty species of herbaceous or sub-shrubby 
plants, with entire or waved-margined leaves, alternate on the stem, and 
downy with starry hairs. Flowers in terminal racemes, honeyed. 
Sepals, four; petals, with long claws, four; stamens, six. The sepals are 
always erect, so that with the claws of the petals they form a kind of 
tube round the stamens and pistil. The two carpels are united to form 
a nearly cylindrical pod. The species are natives of Europe, North Africa, 
West Asia, and (one species) South Africa. 
History Matthiola incana is a British plant, although now 
probably extinct in the wild state except in the Isle of 
Wight, where it grows on the cliffs. It is the parent of all the cultivated 
