AN ENCYCLOPEDIA OF HORTICULTURE. 



197 



Pomaderris continued. 



wrinkled on the upper side ; principal veins very prominent be- 

 neath, h. 3ft. to 6ft 1803. SYN. P. aspera. 



P. aspera (rough). A synonym of P. apetala. 



P. betulina (Birch-like). fl. pale yellow, nearly sessile, in dense, 

 globular heads, solitary or two or three together, on short, 

 axillary or terminal peduncles ; calyx densely hairy ; petals 

 none. I. oblong or obovate, obtuse, seldom above lin. long. A 

 slender shrub or small tree, with elongated branches. (B. M. 

 3212.) 



P. discolor (two-coloured). A variety of P. eUiptica. 



P. eUiptica (elliptic), fl. pale yellow ; calyx white-tomentose ; 

 petals usually broadly cordate or nearly orbicular, concave, on 

 slender claws, often narrower, occasionally abortive ; cymes 

 numerous, in dichotomous panicles. June. I. petiolate, ovate, 

 oblong or ovate-lanceolate, obtuse or rarely acute, usually 2in. 

 to Sin. long, entire or with margins slightly waved, white-tomen- 

 tose beneath. A. 6ft 1805. (B. M. 1510.) The variety discolor 

 has the calyx tube less silky-hairy, and the leaves often less 

 obtuse. 



P. ericifolia (Heath-leaved). A synonym of P. phylicifolia. 



P. lanigera (woolly), fl. pale yellow ; calyx tube half as long as 

 the lobes ; petals ovate, concave, on slender claws ; panicles 

 often larger and less corymbose than in P. eUiptica. April. 

 I. oblong or ovate-lanceolate, the under side, as well as the young 

 branches, clothed with soft, often rusty, tomentum. A. 3ft 1806. 

 (B. M. 1823.) SYN. Ceanothug laniger (A. B. B, 569). 



P. ledifolia (Ledum-leaved). fl. pale yellow, few, in small, loose, 

 shortly pedunculate cymes in the upper axils ; calyx tube very 

 short ; petals narrow, slightly concave. April. L narrow, 

 oblong, obtuse, about iin. long, entire, glabrous above, white 

 beneath, the margins slightly recurved. A. 2ft. 1824. 



P. phillyreoides (Phillyrea-like). JL pale yellow, variable in 

 size ; cymes compact, in small, terminal panicles ; calyx tul it- 

 shorter than the lobes ; petals similar to those of P. elliptic^, 

 but usually narrower. April. I. seldom liin. long, oblong or 

 oval, obtuse or acute, entire, firm, glabrous or minutely hoary 

 above, softly white or rusty-downy beneath. A. 2ft. 1818. SYN. 

 P. andromedce/olia (B. M. 3219). 



P. phylicifolia (Phylica-leaved). /. pale yellow, small and few, 

 in little, loose cymes in the upper axils, the upper ones forming 

 thyrsoid, leafy panicles ; petals none. April I. narrow or linear- 

 oblong, nearly sessile, seldom above iin. long ; margins much 



revolute ; under surface white-tomentose, upper surface hairy ; 

 leaves sometimes broader, and nearly flat h. 2ft 1819. (L. B. C. 

 120.) SYN. P. ericifolia. 



P. vacciniifolia (Whortleberry-leaved), fl. cream-colour ; cymes 

 small, in ovoid, terminal panicles of about lin. in length ; calyx 

 tube very short ; petals broad. I. ovate or nearly orbicular, 

 very obtuse, seldom above iin. long, glabrous above, white on 

 the under surface. 1869. 



FOMAB.IA (named after Pomar, physician to 

 Philip III. of Spain). OED. LeguminosoB. A genus com- 

 prising five or six species of greenhouse, unarmed trees 

 or shrubs, more or less black-dotted, mostly extra-tropical 

 South American, and now included, by Bentham and 

 Hooker, under Ccesalpinia. Calyx segments entire or 

 at length loosely glandulose-fimbriate. Pods oblong or 

 lanceolate, oblique or falcate, glandulose. Leaflets usually 

 small, coriaceous. For culture of P. glandulosa, the only 

 species introduced, see Caesalpinia. 



P. glandulosa (glandular), fl. yellow, disposed in axillary 

 racemes; petals nve, shortly unguiculate. May. I. abruptly 

 bipinnate ; stipules pinnatifid. h. 2ft. New Spain, 1826. The 

 branches, calyx, and corolla, are glandular. 



POMATOCALPA. A synonym of Cleisoetoma. 



POMAX (from poma, an operculum ; referring to 

 the operculum of the fruit). OBD. Rubiacece. A mono- 

 typic genus. The species is a small, greenhouse, branched, 

 hirsute or glabrous under- shrub. It only differs from 

 Opercularia (which see for culture) " in the simple 

 flower-heads forming an umbel, instead of being united in 

 a compound head " (Bentham). 

 P. hirta (hairy). A synonym of P. umbellata. 



P. umbellata (umbelled). fl. greenish-white, disposed in a 

 terminal, sessile umbel within the last leaves ; corolla about Jin. 

 long. July. L petiolate, ovate, elliptical, or lanceolate, mostly 

 under Jin. long, or rather more when narrow, h. not more than 

 1ft. Australia, 1826. SYNS. P. hirta, Opercularia umbellata. 



POM BALI A. Included under lonidium. 



POME. A fleshy, many-celled fruit, e.g., an Apple. 



POME.2E. A tribe of Rosacea. 



POMEGRANATE (Punica Granatum). A deciduous 

 tree, which ranges from 15ft. to 20ft. in height, and has 

 numerous, slender branches some being armed with sharp 

 thorns. It is a native of Cabul and Persia, and is pro- 

 bably wild in North-west India; it is very commonly 

 cultivated throughout the warmer regions of the globe. 

 The fruit of the Pomegranate will be remembered in 

 connection with Scripture history, where it is mentioned 

 in conjunction with that of the Vine, Fig-tree, Olive, Ac. 

 The cultivation of the tree dates back, therefore, to re- 

 mote antiquity : it is said to have been introduced to 

 this country before 1600, and to have been cultivated by 

 Gerarde. Although such an old occupant of our 

 gardens, it is very seldom that froita are ripened. The 

 fruits "are generally about the size of the fist, and 

 have a tough, leathery rind, of a beautiful deep 

 golden colour, tinged with red, and are crowned with 

 the remains of the calyx lobes " (" Treasury of Botany "). 



FIG. 249. FRfiTi.vo BRA.XCHLET OF POMEGRANATE. 



See Fig. 249. As an ornamental tree, the Pomegranate 

 is much prized in the South of Europe, and in many 

 Eastern countries; but in Britain even its flowering 

 is chiefly limited to the most exceptionally favoured 

 localities. There is a double-flowered variety, and con- 

 siderable variation of colour exists amongst those 

 both with single and double flowers. The flowers 

 are produced on the ends of branches made annually, 

 sometimes singly, at others three or four together; 

 generally, where they appear at all, a succession is kept 

 up from about June until September. In inland and 

 northern districts, the Pomegranate should be grown 

 against a south wall, or in a tub or large pot in a 

 greenhouse. A rich, loamy soil is that best suited to its 

 requirements. Single varieties may be raised from seeds, 

 and all varieties increased by cuttings, suckers, layers, 

 or by grafting, using the common sort as a stock. 



PONCELETIA. A synonym of Sprengelia (which 

 see). 



PONDWEED. See Potamogeton. 



FONE&A (from poneros, miserable ; referring to the 

 appearance of the species). SYN. Nemaconia. OBD. 

 Orchideoe. A genus comprising six or seven species of 

 stove, epiphytal orchids, natives of Central America and 

 Mexico. Flowers rather small, axillary, in tufts upon the 

 young leafy or the old leafless stems ; sepals erect, fleshy, 

 the lateral ones largest, and connate with the elongated 

 foot of the column ; petals free ; lip naked, two-lobed, 

 wedge-shaped, articulate with the foot of the column, 

 which is short and terete; anther membranous, four- 

 celled, containing four pollen masses, adhering in pairs by 

 means of two powdery caudicles. Leaves alternate, in 

 two rows, almost grass-like. The species introduced 

 amethystina, graminifolia, Kienastii, leucantha, macro- 

 glossa, pleurostachys, and striata are all of botanical 

 interest only. 



