RHU 



[ 77* 



top stout laths are fixed, as in the ac- 

 companying sketch, to prevent the 

 dung falling upon the plants. 



The dung may be either fresh, or 

 that which has already undergone fer- 

 mentation, placed all round the frame 

 eighteen inches thick, and the top 

 covered with long litter. The tempe- 

 rature in the interior should have a 

 range from 55 to 00. If it rises 

 higher, two or three large holes made 

 through the top soon corrects it. 



Rhubarb may he forced without either 

 pots or frame, by merely covering the 

 plants six inches deep with light Utter, 

 care being taken that the plants are 

 not injured. 



Mr. Knight's mode of forcing is to 

 place in the winter as many plants as 

 necessary in large deep pots, each pot 

 receiving as many as it can contain, 

 and the insterstices entirely rilled up 

 by fine sandy loam, washed in. The 

 tops of the roots are placed on a level 

 with each other, and about an inch 

 below the surface. These being co- 

 vered with inverted pots of the same 

 size, may be placed in a vinery or hot 

 bed, and on the approach of spring, 

 any time after January, any room or 

 cellar will be sufficiently warm. If co- 

 piously supplied with water, the plants 

 vegetate rapidly and vigorously, and 

 each pot will produce three succes- 

 sional cuttings, the first two being the 

 most plentiful. As soon as the third 

 is gathered, the roots may be changed, 

 and those removed replanted in the 

 ground, Avhen they will attain sufficient 

 strength to be forced again in a year's 

 time. If not, it is of little consequence, 

 for year-old roots raised from cuttings, 

 or even seed sown in autumn, are suffi- 

 ciently strong for use. 



Propagation by Division. Mr. Rogers, 

 a successful cultivator, says that when 

 the rhubarb is propagated by the root, 

 care must be taken to retain a bud on 

 the crown of each offset, together with 



i small portion of the root itself, with, 

 f possible, some fibres attached to it. 

 These offsets may be taken from roots 

 of three or four years old, without in- 

 ury to the plant. They may be planted 

 where they are intended to remain, at 

 the same distance and in the same 

 manner as advised for the seedlings. 



RHU'S. Sumach. (From rhudd, red ; 

 colour of the fruit. Nat. ord., Anacards 

 [Anacardiacese]. Linn., 5-Pentandria 

 3-Trigynia.) 



Hardy deciduous trees and shrubs. By seeds, 

 layers, and cuttings of roots and shoots ; light 

 fibry loam. We have omitted all the green- 

 house and stove species except javanica, which 

 requires a greenhouse. 

 R. ame'la (Amela). 40. Nepaul. 1823. 



uroma'tica (aromatic). 8. Yellow. May. 



N. America. 1773. 

 copalli'na (Gum-copal). 6. Green, yellow. 



August. N. America. 1688. 

 leuca'ntha (white - flowered). 4. 



Whitish. August. N.America. 



coria'ria(Coriaria.-leaved). 10. Green, yellow. 



July. S. America. 1640. 



co'tinus (Wild Olive). 6. Pale purple. June. 



S. Europe. 1656. 



diversifo'lia (various - leaved). Greenish- 



white. June. California, 



diversi'loba (various-lobed). 6. White. June. 



California. 1843. 



e'legans (elegant). 10. Red. July, North 



America. 1726. 



gla'bra (smooth). 8. Green, yellow. August. 



N. America. 1726. 

 cocci'nea (scarlet). 10. Red. June. 



N. America. 

 dioi'ca (dioecious). 8. Greenish. July. 



N. America. 



Java'nica (Javanese). 10. White. August. 



Java. 1799. 



oxyaca'ntha (Hawthorn -like). 6. Green, 



yellow. Barbary. 1823. 



pu'mila (dwarf-poisonotts). 1. Green, yellow. 



July. N. America. 1806 



ra'dicans (rooting). 3. Green, yellow. June. 



N. America. Creeper. 

 microca'rpa (small - fruited). 2. 



Green, yellow. June. N. America. 



Climber. 

 volu 1 bills (twining). 2. Green, 



yellow. June. N. America. Climber. 

 vulga'ris (common). Green, yellow. 



June. N. America. Creeper. 



suave'olens (sweet-smelling). 6. Greenish. 



yellow. May. N. America. 



typhi'na (fever). 20. Green, yellow. July. 



N. America. 1629. 

 arbore'scens (tree-like). 25. Green, 



yellow. July. 

 -frute'scens (shrubby). 6. Green, 



yellow. July. 



undula'ta (waved - leaved}. 5. Whitish- 



yellow. C. of Good Hope. 1816. 



ve'rnix (varnish). 15. Green, yellow. July. 



N. America. 1713. 



