Peraphyllum 



( 177) 



Peridermium 



stems slender and 



thread-like ; a pretty 



basket plant (sy. 



prostnitaof gardens), 

 clusia-t'olia (fife obtusi- 



folia). 

 ebuniea, 12" to 15", grn., 



veiue<l emerald grn., 



petioles wh., habit 



tufted, 

 incana. I'.sub-shr., fleshv, 



covered wh. hairs, 

 inquilina, small, grn.. 



fleshy, round ; a pretty 



trailer. 



microphylla, small, ob- 

 long, grn., trailer. 



obliqua, fleshy, grn. (syii. 

 Piper acuminatum). 



peltieforniis, dark grn., 

 banded grey. 



prostrata of gardens (nee 

 brevipes). 



pnbifolia, small, ovate, 

 fleshy, gru., banded 

 grey ; baskets. 



reseda?flora, dark grn. . 

 flowers wh., fragrant. 



velutinu, dark grn., 

 banded grey, stems red. 



PERAPHYLLUM. 



A hardy, branching shrub (ord. Rosaceae). It 

 was. until recently, included with the Amelanchiers, 

 and succeeds under the same treatment. 



Only Species : 



raniosissiruum, 2' to 6', My., hdy., wh., ro., j" 

 across, bushy. 



PERENNIAL. 



Plants which live and flower each year for 

 several years that is, upwards of two years are 

 termed perennials. Strictly speaking, this includes 

 all shrubs and trees as well as herbaceous plants, 

 but t lie gardener has narrowed down the meaning, 

 and when he speaks of perennials he means hardy 

 herbaceous perennials. (See HERBACEOUS PLANTS.) 



PERESKIA. (AMERICAN or BABBADOES 



GOOSEBERRY.) 



Prickly stove trees and shrubs (ord. Cacteae), 

 some of which have showy flowers. Bleo and 

 aculeata are chiefly grown to furnish stocks whereon 

 to graft other Cacti, notably Epiphyllums 

 aculeata is the more extensively used of the two. 

 I'ropagation, by cuttings inserted in very sandy 

 soil, and kept in a dry heat. Soil, sandy loam, 

 with crushed bricks or potsherds. Firm potting. 



Principal Species and Varieties : 

 aculeata. .V to 7'. Oct., shr., red, stamens red, 



hr.,wh., fruit globose. wh. 



Kubeus, lanceolata, and grandifolia, 6', Aug., wh., 



rotunda are vars. 

 American or Barbadoea 

 Gooseberry. 

 Bleo, 8' to 10', Oct., Jan., 



Other Species : 

 lyeliimlittora, yel., Rose- 

 like. 

 Pititache, 3', Sep., shr., 



wh. 



Pcrppigii, Ivs. grn., spines 

 wh., strong. 



PEREZIA (.-//. CLAKIOJIEA). 



Greenhouse, halt-hardy, and hardy herbs {ord. 

 Composite), few of which are known to cultivators. 

 Propagation, the perennials by cuttings and root 



l'i-/iiiiia (., I'itcairnia). 

 l'< l>l>er (see I'iper). 

 J'rji/tcr, dhincge, (see XantJioxi/him). 

 /''/>j>:-r \'inc(see Vitis arbiirea). 

 !'</>/>, r in hit (we Mi'/tt/ia pipcrita). 

 Prppermort (see Lepidiuni). 

 1',-ril'iriinn (in part, , ape Trixii). 

 Pereiria (we f'utcininm). 

 42 



very spiny, spines blk., 

 3" long (*yrt. graudi- 

 flora). 



zinniastiora, resembles 

 Bleo, but has rosy red 

 flowers 2" across. 



portulacfefolia, 20' to 30', 

 pur., fruit round, wh. 

 fleshed, black seeded. 



spathulata, Ivs. very thick, 

 red. 



subulata, stem very fleshy. 



viscosa, U', Je., hdy. per., 

 pur. , red (syn . Homoiau- 

 thus viscosus). 



division, and the annuals by seed. Soil, loam two 

 parts, leaf mould one part, and sand for the pot 

 plants, and ordinary garden soil for the hardy 

 species. 



Principal Species : 



sonchifolia, hlf-hdy. ann., wh. ; like a small 

 double Camellia. 



Other Species : 

 inultiflora, hlf-hdy. ann., 



bl. (*y. Homoianthus 



multiflorus). 



PERGOLA. 



An extended series of arches ; taken together, a 

 long arch, of which the permanent portion is 

 represented by the framework. The mission of 

 the pergola is twofold, first to supply cosy nooks 

 and arbours or a partially protected promenade, 

 and secondly to afford support to various climbers 

 which form, in summer, a more or less complete 

 leafy canopy. 



When the foundations for the uprights are 

 composed of piers of brick or dressed stone, and 

 the posts themselves of prepared Oak or iron, a 

 pergola will cost a good deal of money, but where 

 the simpler plan of using undressed Oak or Kir, 

 the ends being creosoted before being fixed in the 

 ground, is adopted, the cost is greatly reduced. Also 

 the appearance of the structure as a whole is 

 considerably enhanced. The dimensions of the 

 pergola will depend upon the desires of the owner 

 and the size of the garden, but it should not be less 

 than 7' in width or it will not be effective. The 

 cross beams at the top must at least allow of visitors 

 walking underneath without stooping. Thus a 

 height of G' is the minimum, 7' will be better, and 

 8', 10', or 12' is not too much, provided the other 

 dimensions are in proportion. Any of the climbers 

 recommended under ARBOURS may be utilised. 

 (flee also CLIMBERS.) 



PERGULARIA. 



Stove evergreen climbers (ord. Asclepiadeaa) 

 which should be grown like Stephanotis. The 

 plants are rare in cultivation, but odoratissima is 

 worthy of attention. 



Principal Species : 



odoratissima, Je., grn 

 \\V-t Coast Creeper. 



Other Species : 

 minor, My., Aug., or., 



yel., fragrant, 

 sauguinoleuta, Jy., gru., 



yel. ; very fragrant. 



yel. ; juice of plant 

 blood red (correctly a 

 Cryptolepis). 



PERICOME. 



Half-hardy, shrubby perennials (ord. Composite), 

 of which only two species are recognised. Propa- 

 gation, by seeds and division. Any ordinarv garden 

 soil. 



Principal Species : 



caudata, 3' to 4', hdy., sum., golden yel. The 

 whole plant is strongly scented. 



PERIDERMIUM. 



A small but rather destructive group of Fungi 

 which are parasitic upon the Coniferae. Its 

 members belong to the section known as Red 

 Rusts, in which the mycelium part (vegetative) 

 runs in the tissues of the leaves and branches of 

 the host, and produces its fruits externally in the 



