252 Encyclopaedia of Gardening 



leaves. Citriodorum, white, summer, is Citron-scented. Fragrans, 

 white, veined red, summer, has a smell of nutmeg. Radula, purple, 

 June, is Balsam-scented. Tomentosum, white, summer, smells of 

 peppermint. Quercifolium is interesting as having Oak-shaped 

 leaves, and Inquinans and Zonale as parents of the popular Zonal 

 Geranium. Endlicherianum differs from the majority in being 

 herbaceous. All may be grown in a large, cool, airy greenhouse or 

 conservatory, and need little water in winter. Loam, with a third 

 of leaf mould, and sand, suits. Propagation is by seeds in spring 

 or cuttings in autumn. Ivy-leaved Pelargoniums are popular, both 

 for garden and pot culture. They make beautiful beds, and are 

 also suitable for hanging baskets and pillar vases on balconies and 

 at "the side of steps. Propagation and soil are the same as for 

 Zonal Geraniums (see Geranium). Achievement, Beauty of Castle 

 Hill, Jeanne d'Arc, Madame Crousse, Queen of Roses, Ryecroft 

 Surprise, and Souvenir de Charles Turner are good double varieties. 

 La France and Masterpiece are good singles. Madame Crousse is 

 one of the best bedders. 



Pelican Flower, Aristolochia gigas. 

 Pennyroyal. See Kitchen Garden Herbs. 



Pentas (pen-tas, from pente, five, the number of petals and 

 stamens. Ord. Rubiaceae). A small genus of hothouse shrubs, of 

 which only one species is grown to any extent, and that is carnea, a 

 sub-shrub growing about 18 ins. high, with pale pink flowers in 

 autumn and winter (Botanical Magazine, 

 t. 4086) ; kermesina and Quartiniana are 

 varieties of it. Loam with sand and a 

 third of leaf mould suits. Propagation 

 is by cuttings of young shoots in a 

 propagating case. 



Pentstemon (pentste-mon, from pente, 

 five, and stemon, stamen, in allusion to 

 the stamens. Ord. Scrophularineae). 

 A splendid genus of hardy herbaceous 

 ' perennials, sometimes sub-shrubby, as 

 they may hold their stems through the 

 winter. The dwarf species are charming 

 for the rockery, while the taller, larger, 

 florists' varieties are magnificent bed or 

 border plants. There are few soils in 

 which they will not thrive, given a fail- 

 amount of moisture; while they are 

 easily propagated by seed or cuttings. 

 If the seed is sown in a warm house 



A cutting prepared' In autumn. in winter . the plants hardened in a cold 

 i. Depth to insert. frame in spring, and planted out in early 



summer they flower well the same year. 



Cuttings of the best varieties may be taken in autumn, and put in 

 sandy soil in a cold frame; should the plants be too full of bloom to 

 form suitable growths for cuttings, the flower stems may be removed 



PROPAGATING PENTSTEMONS 

 BY CUTTINGS. 



