no PRESENT-DAY GARDENING 



garden climbers, the most popular being P. coerulea, which 

 may be successfully grown either in a stove, a greenhouse, 

 or against a sunny wall. The variety t( Constance Elliott " 

 is illustrated in the Frontispiece. It ripens its fruits freely 

 out of doors. There are several good hybrids between this 

 and other species, namely P. kewensis (Raddiana x coerulea), 

 P. Munroi (alata x ccerulea\ P. ccendea-racemosa, &c. The 

 best tropical species are P. amabilis (cardinalis\ P. macro- 

 carpa, P. quadrangularis, P. racemosa, P. Raddiana (Ker- 

 mesina), P. vtolacea, P. vztifolia, and P. Watsonii. These are 

 all free growers, their stems are supported by tendrils, and 

 they have showy flowers. They are satisfied with ordinary 

 cultural conditions, and they are easily propagated by cut- 

 tings. P. edulis, P. maliformis, and P. macrocarpa have 

 edible fruits. 



PERIPLOCA 



Silk Vine. P. grceca, the only species cultivated, is a 

 hardy, twining, fast-growing shrub of old introduction from 

 South Europe related to Stephanotis. It has long slender 

 stems, which form a dense mass, and are covered with 

 clusters of greenish-brown, hairy flowers in July and 

 August. They have a marked unpleasant odour. Pro- 

 pagated by seeds or cuttings. 



PETR^A 



Beautiful tropical American shrubs with opposite, 

 coriaceous leaves, and violet-purple or bluish flowers 

 appearing in summer. Those of P. volubilis, Purple 

 Wreath, an extremely handsome twiner, are disposed in 

 terminal, elongated, nodding racemes. P. macrostachya 



