POR 



P O R 



to advantage in any large tracts of plantation. 

 To marshy grounds no Trees are better adapted 

 than Poplars, especially the first three Bpecies, all 

 of which thrive remarkably in moist situations. 



A- fot -t or timher trees, the White, Black, 

 Tremulous, and Lombardy l'opljrs are proper 

 to he employed. 



Marshy lands may be improved to much ad- 

 vantage by coppicet of t':u- trees, to cut i 

 four, five, or > . and other small 



purposes; being planted in rows a yard asu 

 and in seven ye rs they will be tit to cut for 

 many small uses, and the stools shooting up 

 again strong, afford a cutting every four or live 

 - afterwards. 



Some sort> may aHo be planted occasionally 

 to form hedge- in moist or other situations, 

 more par'.i uiarlv- the Lombardy Poplar, as this 

 sort is peculiar in branching out numerously 

 from the bottom upwards, and ma) be planted 

 hedge-fashion along the sides, or top of outward 

 watery ditches, in large plants, so as at once to 

 form a hedge ; they being topped to five, six, or 

 seven feet. 



PORRUM. See Allii m. 



PORTLANDI A, a genus containing plants 

 of the trailing evergreen exotic kinds, for the 

 stove. 



It belongs to the class and order Pentandria 

 Monogynia, and ranks in the natural order of 

 Rid ia 



The characters are: that the calyx is a five- 

 leaved perianth, superior : lear'cts oblong-lan- 

 ceolate, permanent : the corolla one-petailed : 

 tube long, funnel-form-ventrioose : border 

 shorter than the tube, five-parted, acute: the 

 staminahavc five awl-shaped filaments, declined, 

 almost the length of the corolla, from the bot- 

 tom of the tube: anthers linear, erect, the 

 length of the corolla : the pistillum is a five- 

 cornered srerm, roundish, inferior: style sim- 

 ple, the length of the stamens : stigma oblong, 

 obtuse: the pericarpium is an obovate capsule, 

 rive-streaked, five-cornered, retuse, two-celled, 

 two-valvcd: opening at the top: partition con- 

 . seeds very manv, roundish, compressed, 

 imbricate. 



The species cultivated is P. gra: I 1 r eat- 



flowered Portland ia. 



It has a shrubby, upright stem, branched, 

 knotty, with a smooth bark cracking longitu- 

 dinally : the branches opposite, 

 round, scarcelv divided, leafy, covered with 

 smooth green bark : the buds are gummy : the 

 leaves opposite, spreading, somewhat length- 

 ened at the point, equal at the ba.-e, entire, very 

 smooth, paler beneath, marked with alternate 

 veins projecting on both sides : the footstalks 



arc very short, thick, round below but flatfish 

 above: the stipules between the leaves, connate, 

 triangular, pointed, very smooth, pale, closely 

 priced to the branch : the flowers axillary, 

 mostly solitary, between the stipules, pedun- 

 cled, a little nodding, very large, white, beau- 

 tiful, most fragrant at eight, in the bud yellow- 

 ish tipped with red. It was found in the W i •: 

 Indies, flowering in Julv and August. 



Culture. — These plants may be raised cither 

 from seeds or cuttings. 



The seeds w hen procured should be sown in 

 pots, filled with light earth, in the sprinu, 

 plunging them in the tan-bed, in the stove. 

 When the plants are sufficiently strong, they 

 should be removed into separate pots, 7md be 

 replunged in the bark hot-bed, where tiiev must 

 nstantly kept. 



The .uttings oi the young shoots should be 

 planted ont singly, in pots tilled with the same 

 sort oi mould, plunging them in the bark-bed 

 of the stove; when they have taken good root 

 '.hey should be removed into larger pots, re- 

 plunging them into the tan-bed, where they 

 must ematn. 



They afford a fine effect, when trained on the 

 back part of the stove, in their larger flowers. 



i ; < 'RTULACA, a genus containing plants of 

 the herbaceous and shrubby kinds. 



It belongs to the class and order Dodecandria 

 Monogt/ma, and ranks in the natural order of 

 Si/cci/lentce. 



The characters are : that the calvx is a bifid 

 perianth, small, compressed at the tip, perma- 

 nent (two-leaved, superior, caducous) : the 

 corolla has five petals, Hat, erect, blunt, lanrer 

 than the calyx : the stamina have manv fila- 

 ments (to twenty), capillary, shorter bv half 

 than the corolla : anthers simple : the pistillum 

 is a roundish germ (half inferior) : stvle simple, 

 short: srigraas five, oblong, the length of the 

 style : the pericarpium is a covered capsule, 

 ovate, one-celled (cut transversely) : recepta- 

 cle free (five, free, separate) : the seeds nu- 

 merous, small. 



The species cultivated are: 1. P. ol-trtacea, 

 Garden Purslane; 2. P. Anncampseros-, Round- 

 ■ .! Purslane. 



The first is an annual herbaceous plant, with 

 a round, smooth, procumbent, succulent stem, 

 frequently red, and diffused branch . 

 throwing out fibres at the joints : the It 

 more or less wedge-shaped, oblong, him 1 ', 

 fleshy, smooth, quite eni re, sessile, clustered, 

 especially at the ends of the branches : the 

 flowers are sessile, scattered : corollas yellow, 

 spreading; petals subtruncatc at the tip and 

 emarcinate : the stamens ten : the capsule one- 



