222 THE COMPLETE GARDEN 



B. Perennials According to Colour and Season. This, with 

 its sub-groups, is an interesting group. The division of seasons in 

 these groups is merely relative and is made for the purpose of obtaining 

 some relationship in the succession of bloom throughout the growing 

 season. Many perennials in these groups lap over from one group 

 into the other, but for convenience of reference they are listed only 

 in the season during which they are at their height of bloom. The 

 subdivisions into colours of flowers, as a matter of easy reference, will 

 prove valuable as a check on one's memory and a saving of time in 

 being able to readily select flowers for varying colour effects at differ- 

 ent seasons. 



a. Perennials for spring — purple, lavender, or blue flowers: 



Ajuga genevensis Mertensia virginica 



Erect Bugle Bluebell 



Anchusa italica Myosotis palustris semperflorens 



Italian Alkanet Forget-me-not 



Aquilegia caerulea hybrida Polemonium reptans 



Rocky Mountain Columbine Greek Valerian 



Aubrietia deltoidea graeca Primula denticulata 



Grecian Purple Rock Cress Himalayan Primrose 



Iris cristata Saxifraga cordifolia 



Crested Iris Saxifrage 



Iris germanica hybrids Tradescantia 



German Iris Spiderwort 



Iris pumila azurea Veronica incana 



European Dwarf Iris Hoary Speedwell 



Iris versicolor Vinca minor 



Dwarf Blue Flag Periwinkle 



Linum perenne Viola cornuta 



Perennial Flax Tufted Pansy 

 Viola odorata 

 Scented Violet 



b. Perennials for spring — white flowers: 



Anemone pennsylvanica Aquilegia nivea grandiflora 



Canadian Windflower White Columbine 



Anemone sylvestris Arabis albida 



Snowdrop Windflower Rock Cress 



