March.'] HARDY BIENNIALS. 33 



their being everywhere accessible. Iris humilis, Viola tri- 

 color, thyme, Sea Pink (Stattice Armeria), Mignonette, 

 l^hlox subulata, and Phlox procumbens, all make tolerable 

 edgings. In the Southern States, Euonymus Japonica, kept 

 closely sheared, will make a very handsome green edging. 



HARDY BIENNIALS. 



Biennial plants are such as are of two years' duration. 

 Being sown this year, they flower, seed, or fruit next year, 

 and soon after decay : the seeds should be sown about the 

 end of this month or beginning of next, either in the spot 

 where they are to remain or a compartment by themselves, 

 regularly marked, and to be transplanted in May or Septem- 

 ber. When they appear above ground, thin them out dis- 

 tinctly, that, when they are to be removed, a little earth may 

 adhere to them : a-nd, if sown where they are to stand, leave 

 only three or four plants in each patch. The following list 

 are a few of the free-blooming and more elegant sorts : — 



Agrostemma coronaria, Rose Campion, blooms all summer. 

 Althea rosea, Hollyhock, and all its varieties, very showy in 



July and August. "When any very desirable variety 



is procured, it can be multiplied by dividing the root. 

 Antirrhinum majus, Snap-dragon, and its varieties, require 



to be protected during winter with a few leaves or 



litter. 

 Cantua coronopifolia, flowers in August and September, 



beautiful scarlet, delights in dry, gravelly soil. 



Ipoinoj)sis elegans. 

 Campanula media, dark blue Canterbury 



bell, 

 Campanula media, semi-pleno, half double ! Bloom in June 



Canterbury bell, [ and July. 



Campanula media, alba, white Canterbury 



bell, 



Campanula thyrsoides. 

 Chciranthus cheiri, Wall-flower, should be protected by leaves 



or boards during winter. 

 Digitalis purpurea, purple Foxglove. 

 • alba, white Foxglove. ♦ 



