PAR 



PAR 



for admitting air, and performing other occa- 

 sional culture : the whole being thus formed in 

 the wood work, it is then proper to extend lines 

 of packthread cross-ways of the ribs, going 

 round each, level or even with the upper surface 

 of the frame, continuing two or three rows a 

 foot asunder, from the lower part upward, 

 drawins;; other lines, crossing and intersecting 

 these at the same distance, regularly between the 

 ribs of the frame-work ; which arrangement of 

 the lines is of essential service for the more 

 effectual support of the paper when pasted on 

 the frame, and strengthening it against the 

 power of winds and heavy rains. The paper for 

 this use should he of the larger strong printing 

 or demy kind; which, previously to pasting on the 

 frame, should be moderately damped with water, 

 that it may not sink in hollows after being fixed; 

 and as soon as thus prepared it should be pasted 

 on, sheet and sheet, in a regular manner, one 

 large sheet and a half, or two at most, generally 

 ransring from bottom to top, contriving to have 

 whole ones along the ridge-rails above, extend- 

 ing lengthways and across, placed conveniently 

 to join regularly with the other sheets below ; 

 and if, at the intersections of the packthreads, 

 a small square or round bit of the same paper 

 be pasted on the inside to the main sheets over 

 that part of the packthread, it will give it addi- 

 tional strength against rain and wind. 



When the paper is thus pasted on, and per- 

 fectly dry, it must be oiled over with linseed oil, 

 either raw or boiled : the latter is however ra- 

 ther apt to harden the paper, and more liable to 

 crack or break : it may be applied by means of 

 a painter's soft clean brush, dipping lightly, 

 and brushing the outside of the paper all over, 

 equally in every part ; then placing the frame 

 in some dry covered shed, to remain till the 

 ■whole is thoroughly dry: when it may be used. 



Though these sorts of frames may be cheap, 

 and answer many little purposes of the gardener, 

 they are not by any means so useful as those 

 made with glass. 



PARIETARIA, a genus containing a plant 

 of the shrubby kind for the green-house. 



It belongs to the class and order Polygamia 

 Monoecia, and ranks in the natural order of 

 Scahidce. 



The characters are : that the hermaphrodite 

 flowers are two, contained in a flat six-leaved 

 involucre : the two opposite and outer leaflets 

 larser : the calyx is a one-leafed perianthium, 

 four-cleft, flat, blunt, the size of the involucre 

 halved : there is no corolla, unless the calyx be 

 called so : the stamina have four awl-shaped fi- 

 laments, longer than the flowering perianthium 

 and expanding it, permanent : anthers twin : 



Vol. II. 



the pistillum is an ovate germ : style filiform, 

 coloured : stigma pencilform, capitate : there is 

 no periearpium : perianthium elongated, larger, 

 bell-shaped, the mouth closed by converging 

 segments : the seed one, ovate ; female flower 

 one, between the two hermaphrodites, within the 

 involucre : the calyx as in the hermaphrodites : 

 there is no corolla: tlic pistillum as in the herma- 

 phrodites : there is no periearpium : perian- 

 thium thin, involving the fruit : the seed, as in 

 the hermaphrodites. 



The species cultivated is P. arhorea. Tree 

 Peilitory. 



It is an upright soft shrub, the height of a 

 man : the root w oody, branched, fibrous, rufes- 

 cent: the stem woody, upright, round, the 

 bark full of chinks, ash-coioured : branches 

 and branchlets alternate, spreading, villose, 

 pithy: the shoots red, very villose with hoary 

 hairs : the leaves alternate, sprcadmg, entire, 

 nerved, three-nerved above the base, veined: 

 nerves and veins prominent underneath, grooved 

 above, somewhat wrinkled, the younger ones 

 very much so, underneath villose soft, above 

 bright green, scarcely paler beneath, from four 

 to six inches long, and from two to four wide: 

 the flowers conunonly three, clustered, from the 

 axil of each bracte, sessile, in the male yellow, 

 in the female red herbaceous. According to 

 L'Heritier, the male and female flowers are on 

 different plants. It i» a native of the Canary 

 islands, flowering from February to May. 



Cidiure. — This may be increased by planting 

 cuttings of the young shoots in the summeV 

 season, watering them occ.isionallv till they 

 have stricken root. When the plants are well 

 rooted, they may be removed with balls about 

 their roots into separate pots, and have the con- 

 stant protection of the green-house. 



They aflbrd variety in these collections, 



FAIIKINSONIA, a genus containing a plant 

 of the exotic flowering tree kind. 



It belongs to the class and order Decajidria 

 Mo7iogyiiia, and ranks in the natural order of 

 Lomentaccce. 



The characters of which are : that the calyx 

 is a one-leafed perianthium ; at the base hell- 

 shaped flattish, permanent : border five-parted : 

 segments lanceolate-ovate, acute, coloured, re- 

 flex, almost equal, deciduous: the corolla has 

 five petals, with claws, almost equal, spreading 

 very much, ovate; the lowest kidney-form^ 

 claw upright, very long: the stamina have ten 

 awl-shaped filaments, villose below, declined : 

 anthers oblong, incumbent ; the pistillum is a 

 round germ, long, declined : style filiform, rising, 

 the length of the stamens: stigma blunt: tl)c 

 pericarjiium is a legume very Iou't, round, 



