(6) 



During recent years coniferous evergreens have greatly in- 

 creased in value as ornamental plants and this is the phase of their 

 use considered primarily in this Guide. 



Among the Gymnosperms or naked-seed-plants, the Ginkgo is 

 the only non-cone bearing tree hardy enough to be of ornamental 

 value here. Other coneless Gymnosperms, together with tender 

 coniferous evergreens, may be seen in the greenhouses. 



