Commercial Gardening 



high, with large heart-shaped leaves and clusters of purple-violet Foxglove- 

 like flowers spotted inside with purple brown, rarely seen in Britain. It 

 is chiefly used for subtropical effect in summer by inducing stout stems 

 to spring up as the result of severe pruning. The Paulownia grows in 

 any good garden soil, and is increased from seeds, cuttings of the ripened 

 wood, and also by root cuttings. 



Periploca grseca. A quick-growing shrubby climber with ovate or 

 lance-shaped leaves, and hairy green-and-black flowers with a strong odour. 

 Increased by layers and cuttings. 



Pernettya. This genus contains a few species of dwarf evergreen 

 shrubs with deep-green leathery leaves, small white flowers, and masses 

 of variously coloured berries in autumn and winter. They are excellent 

 plants for massing in beds, on banks, or for rock gardens. They like 

 a compost of sand, peat or leaf mould, and a little loarn, and are increased 

 by layering and from seeds. The best kind is P. mucronata, the Prickly 

 Heath, a wiry shrub, 2-3 ft. high, from the Straits of Magellan. There 

 are several varieties. 



Philadelphus (MocK ORANGE, SERINGA). Ornamental deciduous 

 shrubs, mostly easy to grow in ordinary garden soil, and remarkable 



for their masses of four-petalled pure- 

 white flowers, with masses of golden- 

 knobbed stamens in the centre. 

 Amongst the best-known kinds are 

 the European P. coronarius, 6-12 ft. 

 high, with flowers about 1 in. across. 

 There are several varieties, such as 

 ftore pleno, double flowered; aureus, 

 golden leaved; argenteo-variegatus, 

 leaves variegated with silver. P. Gor- 

 donianus, from north-west America, 

 6-10 ft. high, with flowers about 2 in. 

 across. P. grandiftorus or speciosus 

 (now referred to as latifolius), also 

 from North America, has flowers 3 in. 

 across. P. inodorus has large scent- 

 less flowers and quite entire leaves. 

 P. Lemoinei (fig. 430) is a fine hybrid 

 between coronarius and microphyllus, 

 with flowers over 1 in. across, and 

 has fine varieties called Boule de 

 Neige and Boule d' Argent. P. micro- 

 phyllus is a pretty Colorado shrub, about 3 ft. high, with wiry stems and 

 small Myrtle-like leaves and flowers about 1 in. across; and P. Satsumi, 

 from Japan, has long narrow leaves and flowers about 1J in. across. The 

 Mock Oranges flower during the summer from May till August, and are 

 raised from cuttings, layers, seeds, and suckers. 



Fig. 430. Philadelphus Lemoinei. (.) 



