OSNO 



[ 043 ] 



OLE 



(E. taraxacifo'lia( Dandelion-leaved). . White. 

 June. Peru. 1825. 



tetraga'na (four-angled-^orfrfer/). l. Yel- 



low. July. North America. 1820. 



HABDY BIENNIALS. 



(E. a'lbicans (whitish). 2. Whitish. June. 

 Peru. 1823. 



albicait'lis (white-stalked). . White. June. 



North America. 1811. 



bie'nnis (biennial). 4. Yellow. July. 



North America. 1629. 



bi'frons (two-faced). l. Purple. August. 



Texas. 1835. 



cruciu'ta (cross-flowered). 3. Yellow. July. 



North America. 1 824 . 



ero'sa (jagged). 2. Citron-coloured. July. 



Cape of Good Hope. 1828. 



globula'ris (globular). 3. Yellow. July. 



1824. 



inca'na (hoary). 2. Yellow. July. North 



America. 1820. 



longiflo'ra (long - flowered). 3. Yellow. 



August. Buenos Ayres. 1776' 



me'dia (intermediate). 2. Yellow. July. 



North America. 1823. 



noctu'rna (night-smelling). 2. Yellow. July. 



Cape of Good Hope. 1790. 



odora'ta (sweet-scented). 2. Yellow. June. 



South America. 17QO. 



pube'&cens (downy). 1 . White. July. South 



America. 1825. 



salicifo'lia (Willow - leaved). 2. Yellow. 



July. 1824. 



Simsia'na (Sims's). 3. Yellow. July. 



Mexico. 1816. 



stria' ta (streaked). Yellow. July. 1822. 



villo'sa (shaggy). 2. Yellow. July. Cape 



of Good Hope. 1791. 



HARDY ANNUALS. 



(E. amae'na (pleasing). 1. Purple. July. 

 North America. 1825. 



clava'ta (club-leaved). 1. White, July. 



Mexico. 1827. 



decu'mbens (lying- down). l. Purple. 



August. California. 1827. 



demiflo'ra (close-flowered). 3. Purple. 



August. California. 1830. 



Lindle'yii (Lindley's). l. Purple. August. 



North America. 1826. 



linea'ris (narrow-leaved), li. Yellow. June. 



North America. 1822'. 



Pu'rshii (Pursh's). White. July. North 



America. 1811. 



quadrivu' 'Inera (four- wounded). l. Pink. 



September. North America. 1826. 



sinua'ta (scolloped - leaved). 3. Yellow. 



July. North America. 1770. 



mi'nima (smallest). ^. Yellow. July. 



North America. 1825. 



stri'cta (erect). l. Yellow- June. 1822. 



tenuifo'lia (thin-leaved). l. Purple. Au- 



gust. Chili. 1828. 



trilo'ba (three-lobed). . Yellow. June. 



North America. 1822. 



vimi'nea (twiggy). 2. Purple. July. Cali- 



fornia. 1826. 



virga'ta (rod-shaped). 1$. Purple, white. 



July. Peru. 1823. 



OFFSETS are side bulbs produced by 

 s.ome bulbous roots, and by which the 



species can be propagated. Whatever 

 checks the upward growth of the parent 

 plant, as an early breaking down 

 of the stern, compels the sap to find 

 other organs for its reception, and, 

 consequently, promotes the production 

 of offsets. " The practice," says Dr. 

 Lindley, "of scarring the centre of 

 bulbs, the heads of ecbino cacti, and 

 such plants, and the crown of the stem 

 of species like Littsea geminiflora, in 

 all which cases suckers are the result, 

 is explicable on the foregoing prin- 

 ciple." 



OGECHEE LIME. Ny'ssa ca'ndicans. 



OIL NUT. Hamilto'nia. 



OIL PALM. Ela'is. 



O'LAX. (From olax, furrowed ; flowers 

 partially furrowed or imbricated. Nat. 

 ord., Olive worts [Olseacese]. Linn., 3- 

 Triandria 1-Mo-noqynia.) 



Stove, white - flowered, evergreen climbers, 

 from the East Indies. Cuttings of ripened 

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

 sandy peat, fibry loam, and a little dried leaf- 

 mould. Winter temp., 50 to 55 ; summer, 

 60 to 80. 

 0. imbrica'ta (imbricated). 8. December. 1820. 



sca'ndens (climbing). 8. December. 1820. 



OLDENLA'NDIA. (Named after H. B. 

 Oldenland, a Danish plant collector. 

 Nat. ord., Cinchonads [Cinchonaceee]. 

 Linn., ^-Tetrandria \-Monogynia. Al- 

 lied to Hedyotis.) 



Cuttings of half-ripened shoots of Deppiana, 

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

 peat and loam. Winter temp., 50 to 55; 

 summer, 60 to 85. The annuals sow in a 

 gentle hotbed, in March ; prick out the seed- 

 lings in the bed, and move them to the open 

 border, after gradually hardening them, at the 

 end of May. 



O. Cape'nsis (Cape). White. July. Cape of 

 Good Hope. 1824. Annual. 



carymbo'sa (corymbed). White. June. 



Jamaica. i"3(). Annual. 



Deppia'na (Depp's). 1. White. June. 



Mexico. 1835. Stove evergreen. 



umbella'ta (umbelled). . White. July. 



East Indies. 1792. 



OLD -MAN'S BEARD. Geropo'gon. 



O'LEA. Olive. (From daia, the 

 olive. Nat. ord., Oliveworls [Oleacese]. 

 Linn., 2-Diandria \-Monogynia.') 



The Olive will graft on the Privet, Phillyrea, 

 Ash, Lilac, and others of the order. Evergreens, 

 all white-flowered, except 0. fragruns. Cut- 

 tings of ripened shoots, in spring, in sand; 

 under a hand-light, in a close frame or pit, also, 

 when procurable, by seeds ; and grafting ; loam 

 and peat of an open fibry character. Winter 



