218 PRACTICAL PLANT PROPAGATION 



THUYA Continued 



GRAFTING. Pot common Arborvitae in Autumn, to be used as a stock 

 for Thuya, Thujopsis and Retinispora; keep in cool house until 

 several weeks before grafting. After grafting, keep air of house 

 moist and shade must be given for several weeks. T. occidentalis 

 var. aurea or George Peabody is grafted on type. 

 THUJOPSIS. 



CUTTINGS. Plants are usually bushy and globular. 

 GRAFTING. As in Thuya. Plants are not so long lived. 

 TILIA. Basswood. Linden. Whitewpod. 

 *SEEDS. Sow as soon as ripe or stratify. 



LAYERS. Young tree cut down, the resulting growths are layered. 

 GRAFTED AND BUDDED. Rarer sorts grafted in the Spring, or later; 

 in August, they may be budded on type stock. 



Mr. Render notes that grafted or layered trees remain one-sided 

 for years because the branches have a tendency to make a horizontal 

 instead of an upright growth. 

 TORREYA. Stinking Yew. 



(See Taxus for propagation.) 

 TSUGA. Hemlock. 



CUTTINGS. Partially ripened wood used. 

 GRAFTING. Use T. canadensis as a stock. 

 ULEX. Furze. Gorse. 



SEEDS. Sown in Spring when frost is past. Bloom in two years. 

 CUTTINGS. Green or hard wood. 

 GRAFTING. Grafted in Spring on U. europseus. 

 ULMUS. Elm. (See fig. 105.) 



*SEEDS. Sow when ripe. Most Elms ripen seeds in May or June, 

 which germinate in July and August, but U. parvifolia ripens its 

 seed in October and November. 

 CUTTINGS. Hard wood. 



GRAFTING. It is best to graft or bud upon allied species. Use U. 

 americana, U. campestris, U. foliacea and U. glabra as stocks. 



The whip and splice graft is mostly used. To obtain the beautiful 

 specimens of the Gamperdpwn or Umbrella Elm, a form of U. 

 glabra (montana), this sort is grafted on tall stems; at a height of 

 7 to 8 feet is best, otherwise the mature tree appears dwarfed. 

 This is best done in May. Watch the head for the first few seasons 

 and prune so that it will be well balanced. 

 UNGNADIA. Mexican Buckeye. Spanish Buckeye 

 SEEDS. Sow as soon as ripe. They retain their vitality only a short 



time. 

 VACCINIUM. Blueberry. Huckleberry. 



The notes here offered are a summary of the extensive researches 

 of Dr. Frederick V. Coville.* 



STUMPING. The easiest way to propagate the swamp Blueberry is 

 by a special process of layering named ' ' stumping." The directions 

 are as follows: 



i. In late Fall, Winter, or Spring, preferably in early Spring before 

 the buds have begun to push, cut off at the surface of the ground either 



* Coville, F. V. Directions for Blueberry Culture. Professional Paper Bull. 334, 

 United States Dept. of Agriculture. 



