254 Encyclopaedia of Gardening 



which follow the flowers; there are many varieties, and the colours 

 of the berries differ, being white, flesh, pink, red, or purple. They 

 thrive in equal parts of peat and loam. Propagation is by seeds in 

 spring or layers in autumn. Little pruning is required as the habit 

 is naturally close (syn. Arbutus mucronata). See the Botanical 

 Register, t. 1675, and Botanical Magazine, t. 3093. 



Petasites (petasi-tes, from petasos, umbrella. Ord. Compositae). 

 Hardy herbaceous plants, the most popular of which are fragrans, 

 the winter Heliotrope, a plant growing about 6 ins. high, with white 

 flowers in late winter; and omcinalis, the Butter Bur, 3 to 4 ft., 

 with white flowers in spring. The latter makes a fine plant for the 

 waterside, where its leaves attain to large proportions. They will 

 grow in almost any soil, and may be propagated by division. 



Petunia (petu-nia, from petun, tobacco (Brazilian). Ord. Solana- 

 ceae) . Brilliant plants, with a profusion of large flowers. They are 

 great favourites for bedding, and the double fringed forms are 

 charming for pots. The garden varieties will thrive in almost any 

 soil, and heavy manuring is to be deprecated, as tending to over- 

 luxuriance. Propagation is by seeds, which may be sown in a warm 

 frame or greenhouse in spring, and the plants to go outside hardened 

 in a cold frame. Those for pots should be pinched to make them 

 bushy. Special varieties may be propagated by cuttings in autumn 

 in a warm house. Loam, with sand and a third of leaf mould, will 

 suit them. For beds, plant 2 ft. apart, and peg the shoots down. 

 The old species are rarely grown now, seedsmen offering separate 

 colours, unnamed; and also mixtures, both single and double. 



Peucedanum (peuced-anum. Ord. Umbelliferae) . Sativum is 

 the Parsnip. See Kitchen Garden. 



Phacelia (phace-lia, from phakelos, a bundle. Ord. Hydrophyl- 

 laceae). An unimportant genus, save for the one species campanu- 

 laria, which is a charming blue hardy Californian annual, growing 

 about 9 ins. high, and of compact habit. (See the Botanical Magazine, 

 t- 6735.) For culture, see Annuals. P. viscida is synonymous 

 with Eutoca viscida (Bot. Mag., t. 3572), and has blue flowers. 



Phaenocoma (phaeno-coma, from phainos, bloody, and home, 

 hair. Ord. Compositae). The only species, prolifera, is a handsome 

 greenhouse plant which can be grown into specimens 3 or 4 ft. 

 through, and these when in full bloom are very effective. It is 

 synonymous with Helichrysum proliferum (Botanical Magazine, 

 t. 2365). The variety Barnesii is generally preferred to the type 

 as the habit is better; the flowers are deep crimson. Sandy peat is 

 the best soil. Propagation is by cuttings of firm side shoots in- 

 serted in a propagating case in summer. Repotting should be done 

 when growth starts in spring. They like cool, airy conditions. The 

 flowers last for many weeks. 



Phaio-calanthe. These Orchids are bigeneric, having been 

 obtained by crossing the two genera Phaius and Calanthe. They 

 may be grown in the same way as Phaius (see below). Arnoldiae, 

 yellow and pink; Berryana, rose; and Sedeniana, rose and white, 

 are interesting hybrids. 



