TREE AND SHRUB LIST 205 



OXYDENDRON. Sorrel Tree. 



SEEDS. Sow in frames. Keep shaded and moist until they germinate. 



The plants are apt to be rather difficult to grow the first year. 

 LAYERS. Very slow to grow. 

 PACHYSANDRA. 



CUTTINGS. Soft wood. 

 DIVISION OF RHIZOME. 

 PjEONIA. Shrubby sorts, P. Moutan. 



CUTTINGS. Taken with heel in Summer and placed in cool green- 

 house. 



LAYERING. Layers require about two years to root. 

 GRAFTING. Root grafting. Use the large fleshy roots for stocks 

 and graft by the side graft. Graft in early Autumn and store for 

 Winter. Both root and stock grafting may be used. They may 

 also be grafted on the herbaceous sorts: use a splice or cleft graft. 

 PALIURUS. Christ's Thorn. 



SEEDS. Stratify or sow as soon as ripe. 

 ROOT CUTTINGS. Store in moist sand during Winter. 

 PARROTIA. 



CUTTINGS. Green wood under glass. 

 PASSI FLORA. Passion Flower. 



*GUTTINGS. Take growths from January to April; place in warm 

 propagating bench, shaded and moist. Pot in loam, peat and sand. 

 LAYERS. Compound layers used. 

 ROOT CUTTINGS. 

 PAULOWNIA. Empress Tree. 

 *SEEDS. Sow in Spring. Seedlings 



damp-off easily. 



CUTTINGS. Green wood under glass 

 *RooT CUTTINGS. Cut into three- 

 inch lengths, plant outdoors or 

 in greenhouse in the Spring. 

 LEAF CUTTINGS. Petioles cut 

 short, leaves placed in sand 

 covered with a bell jar. 

 PAVIA. Dwarf Buckeye. Dwarf 



Horse Chestnut. 

 SEEDS. Very easily grown if 



sown soon after ripening. 

 ERIPLOCA. Grecian Silk. 

 *CUTTINGS. Soft wood vine 



under glass. 



*LAYERING. Slow. Easiest method. 



PHELLODENDRON. Cork Tree. 



SEEDS. Freely produced, and 



germinate readily when sown 



in Autumn. 



GRAFTING. The Chinese Cork] 

 Tree (P. amurense) is grafted 

 on P. japonicum since P. 

 amnrense is much superior in 

 corkiness of bark. 

 ROOT CUTTINGS. Spring. 

 LAYERS. Fig. 101 Seed vessels of Paulownia tomentosa 



