ROSACEA. XXII. Rosa. XXIII. Amoreuxia. SANGUISORBE^E. 



589 



all the cultivated roses^ and especially the double flowering house about 55^, never letting it fluctuate to more than 2 or ^ 



iinds, require a rich loamy soil, inclining to clay rather than 



degrees below the above. 



In the second week, aim at 60*^ as the 



sand, and they require also, like most double flowers, plenty of standard; in the third week 65^. When a month has nearly 



moisture when in a growing state. elapsed, begin to increase the heat gradually to 70**, having 



General culture. — To produce strong flowering roses requires brought it to this standard, let it afterwards exceed it from 3 to 



some attention in pruning; old wood should be yearly cut out, 5 degrees rather than sink below. A succession may be kept 



and the young shoots thinned and shortened, according to their up by introducing some pots every 8 or 10 days. 

 strength, and whether number or magnitude of flowers be wanted. Insects. — All the species of /?05a are very liable to the attacks 



Those sorts which throw out numerous suckers, should be taken of insects, especially of the aphides ; some, particularly the briar 



up every three or four years, reduced, and replanted, and most 

 sorts, excepting the standards, will be improved by the practice, 

 provided attention be paid to remove a part of the old soil and 

 replace it by new. The points of the shoots of the more deli- 

 cate sorts of roses are very apt to die when pruning is performed 

 m winter or spring ; to avoid the consequences of this evil, 

 many give a second pruning in June, or do not prune the tender 

 sorts at all till the beginning of that month. A very good time 

 for performing the operation is immediately after the bloom is 

 over, cutting out old exhausted wood, shortening shoots which 

 nave flowered, to a good bud, accompanied with a healthy leaf, 

 out leaving such shoots as are still in a growing state till Oc- 

 tober. Where very large roses are wanted, all the buds, except 

 on that of the extreme point of each shoot, should be pinched 

 off as soon as they make their appearance, and the plant libe- 

 rally supplied with water. To lessen evaporation, and keep up 

 a constant moisture at the roots of their roses, the Paris gar- 

 deners generally mulch them with half rotten stable dung or 

 partially rotten leaves. 



Forwarding and retarding roses, — The earliest flowering rose 

 IS the month ly, which in mild seasons and planted against a wall, 

 )^l sometimes flower in the beginning of April ; the roses next 

 [n succession are the cinnamon^ which flowers in May, the damask^ 

 m the end of May or beginning of June ; the blush, York, and 

 Lancaster, Provins\ and Dutch hundred-leaved, in June, July, 

 3na August. The Virginia and mush roses are the latest Euro- 

 pean sorts ; they flower in September, and in shaded situations 

 ^ul sometimes continue in bloom till the middle of October ; but 

 ^he earliest rose (the monthly), is also the latest, and generally 

 continues flowering till interrupted by frost. The earliest sorts 



"^ay be materially forwarded by being planted against a south terminal, 1 -flowered, infl 

 !*all, and if portable sashes be placed before them, and the wall — Habit of Neurada or Dnjas 



and Scotch rose, are attacked by the cynips rosse, which by punc- 

 turing the bark, occasions the production of rose-galls, and of 

 those massy tufts often seen on wild roses, which were formerly 

 known under the name of bedcquar, and used in medicine. A great 

 number of insects seem fond of the flowers of roses, from the 

 earwig to the seemingly harmless lady-bird, which deposits its 

 larvae in the leaves of various species, both wild and cultivated. 

 There seems no remedy for insects on plants in the open air so 

 simple and effectual as gathering them by hand, or removin;^ the 

 leaf or that part of the shoot which is infected by them. Under 

 cover tobacco smoke will prove an effectual remedy for the 

 aphides ; but the larvae of many others, and especially of the 

 tipula, and the tenthredinidoe, which occasion the wrapping up 

 and shrivelling of the leaves, can only be removed by hand. 



•f* A genus allied to Rosacece. 



XXIIL AMOREU'XIA (this genus is dedicated bySesse and 

 Mocino to P. J. Amoreux, a botanist of Montpelier). Moc. et 

 Sesse, fl. mex. icon. ined. D. C. prod. 2. p. 638. Genus nova, 



Ruiz, et Pav. in herb. Lamb. 



Lin. sYST. Tcosandria, Monogynia. Calyx 5-parted, with 

 a short tube, and oblong, acute lobes. Petals 5, obtuse and 



emarginate at the apex, larger than the calyx, and inserted in its 

 base. Stamens about 20, disposed in one series, shorter than the 



Ovary ovate, free, .^-celled, many-ovulate. Style fili- 



A herb, with alternate, bistipu- 



J^ either flued or heated by fires, or a lining of dung placed 

 oehind, the plants may be brought to flower in February or 

 arch^ The monthly rose, being protected by glass in autumn, 

 *^r aided by artificial heat, may be continued in bloom till Christ- 

 jnas. A very common mode of obtaining late roses^ and one of 



, ^ ^^^^est antiquity, is by cutting all the flower shoots off* wher^ 



e buds begin to appear, or by rubbing off* all the rudiments 



^ shoots of every kind early in the spring ; a second crop is in 



^jsequence produced, which will not be in a state to bloom 



^fore the autumn. 



forcing the rose. — The best sorts for this purpose are the 

 ^^mon and moss Provence. The Indian sorts force well, or 

 l^her in stoves continue in bloom all the year ; but the com- 

 moner varieties not being fragrant, they are in less repute than 

 ^ European roses. Rose plants should be a year in pots pre- 



'o^ly to the autumn when it is intended to force them ; they 

 ^"Id be planted in pots 6 or 8 inches in diameter. In rich loam, 

 *«? Plunged in an open airy situation, their flower-buds pinched 



petals. 



form, acute. Capsule ovate. 



late, palmatifid leaves on long petioles, having the lobes serrated 

 at the apex, and joined together at the base by a foli,' 

 membrane. Peduncles solitary, opposite the leaves, or nearly 



ed at the apex. Flowers large, red. 



but the characters are not suf- 

 ficiently known to determine'which of the genera it comes nearest. 

 1 A. PALMATi'riDA (Moc. ct Scssc, fl. mcx. icon. ined.). %. ? 



G. Native of Mexico. 



Palmatifd-leaved Amoreuxia. PL trailing. 



A mixture of loam, sand, and peat, will probably suit 

 this plant, and cuttings will perhaps root if planted in sand or 

 mould, with a hand-glass placed over them. 



Cult. 



RBEJE 



1 



Sanguisorba in important characters). Lindl. introd. nat. ord. 



p. 80. Rosaceae, Tribe VL Sanguisorbeae, Juss. gen. p. 330. 

 exclusive of some genera. D. C. prod. 2. p. 588. 



Flowers usually unisexual from abortion. Calyx with a 

 thickened tube (f. 78. a.) and a 3 (f 80. a.) -4 (f. 79. b. f 77. 6.) 

 -5-lobed limb, its tube lined with the disk. Petals none. Sta- 

 mens definite, sometimes fewer than the segments of the calyx, 



°^i itly a;;.:;.T„d Z '■Xr?,,; r;,o a ".ure of ;=;;: by »«. wl„-cl, .hey are aUer„a.e, arising fron, .he orifice of .he 



^'*'"''-" • ^ ^ . . - n ' calyx; anthers 2-celled, innate, bursting longitudmally, occa- 



sionally 1 -celled, and bursting transversely. Ovary solitary, 

 simple, with the style proceeding from the apex at the base. 

 Ovulum solitary, always attached to that part of the ovaries 

 which is next the base of the style. Stigma compound or 



Alw » *^^ ^"" ^"^ •■*'"' ^"* """^ ^ ^""^^ circulation of air. 

 . "^crcrombie says, " There is no certainty of obtaining a fine 

 ^ of roses in the depth of winter by tlie most expensive 

 iTa ^^- ^°'"ci"g ; and yet fine flowers may be produced early 

 bcr S'^'"8 ^y any ordinary stove, put in operation in Decern- 

 V When the plants are first introduced, keep the air of the 



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