CrucifercB Cheirantkus. 



45 



scription nor recommendation. The varieties it has given birth 

 to are innumerable. Yellow, orange, purple, brown, and 

 variegated single and double flowers occur. The Eocket 

 Wallflowers form a distinct race, with long narrow flower- 

 spikes. Though probably not indigenous, 

 it is now found in many parts of Britain. 

 The figure is more characteristic of the 

 wild than the cultivated form. 



2. Ch. Marshdllii, syn. Erysimum. 

 A dwarf shrubby plant with evergreen 

 leaves and a profusion of large fragrant 

 orange-coloured flowers. It continues in 

 flower from April till July. Supposed to 

 be of hybrid origin, between the common 

 Wallflower and Ch. alplnus. 



3. Ch. alplnus. A dwarf species about 

 6 inches high, with remotely toothed leaves 

 and an abundance of pale yellow flowers. 

 Summer. Mountains of Europe. 



3. ARABIS. 



Annual or perennial herbs, often with 

 large rosettes of leaves, glabrous or hairy. 

 Radical leaves spathulate, cauline sessile. 

 Flowers white, more rarely purple. Pod 

 linear, compressed, keeled, not elastic ; 

 seeds compressed in 1 or 2 series. 

 Species numerous, chiefly from the tem- 

 perate and arctic regions of the northern 

 hemisphere. The name is from Arabia, 

 the native country of some species. 



1. A. dlbida, syn. A. Caucdsica. Very common in old gar- 

 dens, and a very hardy Spring flowering plant. It grows 

 in patches with slender running stems and rosettes of pale 

 green spathulate toothed leaves clothed with greyish hairs. 

 Flowers pure white, in elongating racemes on leafy erect stems. 

 There is a very pretty variegated variety. Mediterranean re- 

 gion, etc. A. alplna is probably an alpine form of this species. 



2. A. blepharophylla. Similar to the preceding in habit 

 and foliage, but with rosy-purple flowers. From California, 

 but not yet very widely spread in gardens. June. 



3. A. lucida. This species has dense rosettes of glabrous 

 shining sessile spathulate leaves and very small white flowers. 



Fig. 33. Cheiranthus Cheiri. 

 (i nat. size.) 



