THE NURSERY-LIST 251 



Berberis (Barberry). BerbcridacecE. 



Propagated by stratified seeds, and by suckers, layers and 

 cuttings of mature wood. Seeds should be sown in flats or broad- 

 cast in beds in the fall ; seeds of rare kinds should be sown in the 

 greenhouse. Most barberries can be propagated from green 

 cuttings of the young wood taken from the first to the middle of 

 June, and placed in sand in a shaded hotbed. Layers are usually 

 allowed to remain two years. Rare sorts are sometimes grafted 

 on common stocks. 



Berchemia. Rhamnacea. 



Propagated by layering young shoots in autumn ; by cuttings 

 of mature wood and root-cuttings under glass ; and also by seeds. 



Bertolonia. Melastomaceoc. 



Grown from seeds and cuttings. Also by healthy ripened leaves 

 which, if the midrib be nicked in several places and then pegged 

 on a pot of sandy peat, soon form roots and tiny tubers at every 

 incision. Place in a moist propagating-frame. 



Bessera. Liliacece. 



Usually propagated by offsets. 



Beta: Beet. 



Betula (Birch). Betulaceoe. 



Increased by seeds, which must be sown as soon as gathered, or 

 else stratified ; sow rather thickly in sandy soil, slightly or not at 

 all covered, but pressed firmly into the ground and kept moist and 

 shady. Propagated also by layers and rarely by greenwood 

 cuttings under glass ; also by grafting or budding on seedling 

 stocks of B. lenta, B. papyri/era, B. nigra or B. pendula. The 

 grafting is sometimes performed in spring under glass on potted 

 stock, but usually the stocks are budded in summer. 



Biennials. 



Plants that bloom and die the second year from seed, having 

 flowered once, are biennials or two-year subjects. The number 

 of true biennials in the vegetable kingdom is relatively small. 

 The teasel, pasture mullein (Verbascum Thapsus), and common 

 evening primrose (CEnothera biennis) are examples. In the garden, 

 the honesty or lunaria is an example ; also the Allegheny vine 

 or adlumia, and the Canterbury bell. 



