VINES, HARDY AND TENDER 377 



PARTHENOCISSUS. (See Ampelopsis p. 363.) 



PASSIFLORA (Passion Flower). P. incarnata is said to be 

 hardy around Philadelphia. It is one of the most rapid growing 

 species; has large, whitish flowers and bears seeds abundantly. 

 P. carulea is apt to get killed to the ground in Winter north of 

 Washington. P. C. Constance EUiott is a white flowered variety 

 seemingly hardy and more floriferous than the type. Imperatrice 

 Eugenie, Innesii, Lawsoniana and Munroi are good hyrbrids. 

 P. alata and P. guadrangularis (pranadilla) are stove climbers with 

 large, handsome flowers. P. aucubifolia, a variety of the last 

 named, has the foliage handsomely marked with yellowish 

 blotches. 



Propagation. Stock plants will Winter if planted in a frame, 

 the back of which is formed by the wall of a warm house. These 

 may be propagated from cuttings of ripe growths any time in late 

 Summer. The Passifloras are easily propagated by seed. The seed 

 germinates slowly. Half-ripe wood should be used for cut- 

 tings. 



PETREA (Purple Wreath). P. volubilis is a greenhouse 

 climber of very irregular growth, bearing in March and April long 

 racemes of very showy purple flowers. The calyces are only a few 

 shades lighter in color than the corollas. This plant should be in 

 every greenhouse collection. It is very suitable for training up 

 rafters. 



Propagation. Cuttings of the dormant wood will root in heat; 

 the best time to do the work is just before the plants start into 

 growth. 



PUERARIA (KudzuVine). P. hirsuta{Thunbergiana) haslor 

 several years been distributed throughout the country under the 

 name of Dolichos japonicus. It is a hardy, trifoliate leaved vine, 

 having inconspicuous, purplish pea shaped flowers, which are seldom 

 produced except on the old wood of well established plants. The 

 flowers amount to but little, however, in fact, no one would grow 

 the vine on account of the flower display. It is the rapidity with 

 which the vine will cover space which has made it a favorite with 

 those who have given it a trial. It is, without doubt, the most 

 rapid growing hardy vine in cultivation, and is very useful for 

 covering the ground, for trellis work, and especially for hiding un- 

 sightly structures. 



