RES 



[ 689] 



RHA 



a French botanist. Nat.ord., Leguminous 

 Plants [Fabacese]. Linn., \Q~Monadelpliia 

 fj-Decandria. Allied to Psoralea.) 



Stove evergreen shrubs, with yellow flowers. 

 Cuttings of half-ripened, stubby shoots in sand, 

 under a bell-glass, in heat; sandy loam, fibry 

 peat, and dried leaf-mould. Winter temp., 50 

 to 60 ; summer, CO to 80. 

 R. obcordu'ta (reversed-heart-teaoed). 1 . July. 

 Senegal. 1825. 



sphterospe'rma (round-seeded). I.April. Cape 



of Good Hope. 1816. 



EESE'DA. Mignonette. (From resedo,to 

 calm ; supposed virtue for external bruises. 

 Nat. ord., Weldworts [Resedaceffi]. Linn., 

 11-Dodecandria 3-Triyynia.) 



All by seeds; the half-shrubby kinds also by 

 cuttings ; seeds must be sown at different times, ac- 

 cording as the bloom is wanted. The beginning and 

 middle of May is early enough to sow in the open 

 border. Though usually treated as annuals, most 

 of the Mignonettes may be grown as under-shrubs 

 or perennials, if they are prevented seeding freely, 

 and kept from frost'in winter. We have seen the 

 common Mignonette that had been kept in a pot 

 about eight years, and flowered freely every sea- 

 son. See MIGNONETTE. 



M. Chine'nsis (China). 2. Yellow, green. June. 

 China. 1819. 



odora'ta (scented-Mignonette}. 1. Green, red. 



August. Italy. 1752. 



frute'scens (shrubby). 2. August. Egypt. 



1752. 



trunca'ta (abrupt-ended-fraoed). l. Yellow. 



June. Natolia. 1836. 



RESERVE GAEDEN. See NURSERY. 



REST. That period when a plant is not 

 growing. 



REST-HARROW. Ono'nis. 



RESURRECTION PLANT. Anasta'tica. 



RETANI'LLA. (The Peruvian name. 

 Nat.ord.,^/iamarfs [Rhamnacese]. Linn., 

 fy'Pentandria 1-Monogynia. Allied to Col- 

 letia.) 



Evergreen shrubs. Cuttings of young shoots in 

 sand, under a glass, in summer; sandy loam and 

 fibry peat. The species from Peru requires a warm 

 greenhouse, and that from Chili the protection of 

 a cold pit in winter, or a very sheltered situation 

 out of doors, or against a wall. 

 Jl. ;jfte / <Jra(ephedra-like). 3. Cream. Chili. 1823. 



obcorda'ta (reversed-heart-/eaed). 2. Yellow. 



Peru. 1822. 



RETARDING requires as much skill as 

 forcing, for as the latter requires the ap- 

 plication of all that is suitable to the pro- 

 motion of a plant's rapid healthy growth, 

 so retarding requires the withholding 

 from it of those contingencies. Thus to 

 retard growth, the lowest temperature, 

 and the least degree of light compatible 

 with healthy growth, must be secured ; 

 and to this end plants for succession are 

 often placed on the north side of a wall. 

 See SCREENS. 

 44 



Then, again, as in the case of rasp- 

 berries and strawberries, plants are often 

 cut down in the spring, compelling them 

 to form fresh foliage and stems, and thus 

 be productive in the autumn instead of 

 the summer. 



The vegetation of many bulbs may bo 

 prevented by merely keeping them dry, 

 and, indeed, the withholding the usual 

 supply of water, giving it only in dimi- 

 nished quantities, is necessary in all re- 

 tarding treatment. To secure the entire 

 resting of bulbs, and of such plants as 

 will bear so low a temperature, the at- 

 mosphere of the ice-house is effectual ; 

 and to this end it should have a few 

 shelves for the support of boxes or flower- 

 pots. Banks of earth ranging east and 

 west, and facing the north at a very acute 

 angle, are very useful in retarding the 

 early advance to seed in hot weather of 

 spinach, lettuces, &c. Espaliers ranging 

 similarly, and shaded during the whole of 

 March and the two following months, will 

 blossom later and more unfailingly than 

 trees more exposed to the sun in spring-. 

 Similar exclusion of heat and light re- 

 tards the ripening of picked fruit, and 

 if the air be excluded from them, or its 

 oxygen withdrawn, fruit will remain un- 

 ripened for weeks. To effect this, put a 

 paste formed of lime, sulphate of iron, 

 and water, at the bottom of a wide- 

 mouthed glass-bottle, then a layer of large 

 pebbles to keep the fruit from the paste, 

 then fill the bottle with peaches, apricots, 

 or plums, gathered a few days before they 

 are ripe, cork the bottle tight, and cover 

 the cork with melted resin. They have 

 been thus kept for a month, and summer 

 apples and pears for three months^ They 

 ripen when again exposed to the air. 



RETINIPHY/LLUM. (From refine, resin, 

 and phyllon, a leaf. Nat. ord., Cinchonads 

 [Cinchonacese]. Linn., 5-Pentandria 1- 

 Monogynia. Allied to Hamiltonia.) 



Stove evergreen shrub. Cuttings of half-ripened 

 shoots in sand, under a bell-glass, and in a sweet, 

 moist bottom-heat ; sandy loam and fibry peat, 

 with pieces of charcoal. Winter temp., 55 to 

 60 ; summer, 60 to 85. 



R. secundiflo'rum (side-flowering). 10. White. 

 S. Amer. 1839. 



RHA'MNUS. Buckthorn. (From rham, 

 a Celtic word, signifying a tuft of branches. 

 Nat.ord., jRAam/mrfs[ Rhamnacese]. Linn., 

 5-Pentandria 1-Monogynia.) 



Greenhouse and stove species, by cuttings in 

 sand, under a glass, in summer, and in a cold or 

 close, warm pit respectively; sandy loam and 

 2 Y 



