EVO 



[ m 3 



EXO 



HARDY ANNUALS. 



E. NuttaUia'nus(X\itta.n's). %. July. North 

 America. 1824. 



STOVE EVERGREENS. 



E.ceeru'lcus (sky-blue). July. Jamaica. 1845. 



lanceola'tus (spear - head - leaved}. June. 



South America. 1818. 



latifo'lius (broad-leaved). 2. White. June. 



Brazil. 1819. 



purpu'reo-cceru'leus (purplish - blue) . 1 . 



July. Jamaica. 1845. 



villo'sus (shaggy). 1. July. South America. 



1810. 



STOVE ANNUALS. 



E. alsinoi'des (Chickweed-like). . July. East 

 Indies. 1817. 



emargina'tus (end-notched). 1. September. 



East Indies. 1816. 



gange'ticus (Ganges). 1. July. East Indies. 



Trinidad. 1818. 

 Jy. South America. 

 1810. 



linifo'lius (Flax-leaved). 2. August. Ja- 



maica. 1732. 



nummula'ris (Money- wort-like). . Sep- 



tember. Jamaica. 1816. 



hirsu'tus (hairy). . July. 



inca'nus (hoary). ^. July. 



seri'ceus (silky). A. 

 Indies, 1816. 



White. July. West 



E'XACUM. (From ex, out of, ago, to 

 drive; supposed virtue of expelling 

 poison. Nat. ord., Gentianworts [Gen- 

 tianacege]. Linn., -Tetrandria \-Mono- 

 yynia. Allied to Chironia.) 



Hardy annuals. Sow in April, in a moist 



border, in which there is a portion of peat. 



E.pulche'llum (pretty). $. Pink. August. 

 New Jersey. 1826. 



tetrago'num (four-angled). 14. Blue. Au- 

 gust. Nepaul. 1820. 



bico'lor (two-coloured). 1. Pale 



purple. June. Corcan. 1846. 



EXCJECA'RIA. ( From excicco, to blind ; 



crops are very few. That wliicb ap- 

 pears above the point of union between 

 the scion and stock, is caused by the 

 former being the freer grower of the 

 two, and is a warning that should be 

 remembered, for it curtails the lon- 

 gevity of the tree, the supply of sap 

 gradually becoming inefficient. The 

 j excresences which occur upon the 

 ! branches of some apples, as those of 

 the codling and June-eating, cannot be 

 j looked upon as disease, for they arise 

 from congeries of abortive buds, which 

 readily protrude roots if buried in the 

 soil, making those among the few 

 apples which can be propagated by 

 cuttings. Of a similar nature are the 

 huge excrescences so prevalent on aged 

 oaks and elms. Bulbous excrescences 

 are formed upon the roots of many 

 plants if compelled to grow upon a soil 

 drier than that which best suits them. 

 This is the case especially with two 

 grasses, Phle'um prate' use and Alope'cu- 

 rus yenicula'tus, and is evidently a wise 

 provision of nature to secure the pro- 

 pagation of the species, for those bulbs 

 will vegetate long after the remainder 

 of the plant has been destroyed by the 

 excessive dryness of the soil. 



EXOGO'NIUM. (From exo, external, 

 and gonu, a joint ; referring to the 

 stems. Nat. ord., B'mdiveeds [Convol- 

 vulacese]. Linn., ^-Pentandria i-Mono- 

 gynia. Allied to Ipomsea.) 



E. purga is the true source of the best kind 

 of Jalap. A beautiful crimson-flowered green- 

 house twiner, not a stove climber as mentioned 



the j Uice and smoke of burning branches erroneously in books ; we have even flowered it 

 i; M *U MA D ;.* xi.4 S ,., " j beautifully in the open air. Greenhouse ever- 



injure the eye-sight. Nat. ord.. Spuryc- 

 ivorls [Euphorbiacese]. Linn., 2- 

 Dicecia 13-Polyandria. Allied to Gus- 

 sonia and Hippomane.) 



Stove evergreen shrubs, with white flowers ; 

 cuttings in sandy soil, under a bell-glass, in 

 spring or autumn ; fibry sandy loam. Summer 

 temp., 60 to 75 ; winter, 48 to 55. 

 E. Agallo'cha (Ceylon). 5. May. East In- 

 dies. 1820. 



glandulo'sa (glanded). 5. May. Jamaica. 



1821. 



serra'ta (saw-leaved). 6. May. Chili. 1796. 



EXCRESCENCE. Independently of 

 Galls, which are caused by the punc- 

 tures of insects, and the swellings 

 which always accompany Canker, the 



excreseuces which injure the gardener's I winter, 50 to 55 



green twiners ; cuttings of short side shoots in 

 sandy soil, under a bell-glass, and in bottom- 

 heat. Summer temp., 55 to 75; winter, 45 

 to 50. 

 E.filifo'rme (thread -shaped). 10. Purple. 



October. West Indies. 1823. 

 pu'rga (purgative. True Jalap). 10. Rose, 



purple. September. Vera Cruz. 1838. 

 repa'ndum (wavy-edged). 10. Scarlet. June. 



West Indies. 1793. 



EXOSTE'MMA. (From exo, externally, 

 and stemma, a crown ; referring to the 

 nower-heads. Nat. ord., Cinchonarix 

 [Cinchonaceae). Linn., 5-Pcntandria 

 l-Monor/ynia. Allied to Luculia.) 



Stove evergreen tree. Cuttings of ripe younp 

 shoots, in sand, under a glass, in bottom-heat, ; 

 loam and peat. Summer temp., 60 to 80; 



