PON [ \ 



white minute hair*, a yellow stripo on 

 the back, and yellow spots on the sides, 

 on a pale ground. In some years it is 

 very injurious to the cabbage and turnip 

 plants; it also infests Mignonette, which 

 it strips entirely of its leaves. It is 

 very difficult to be discovered, from its 

 colour. The pupa is yellowish or 

 greenish-gray, with three yellow stripes. 

 KoUar. 



POPLAR. Po'pulm. 



POPPY. Papa'ver. 



PONTEDE 'EIA. ( Named after .7. Pon - 

 tedera, professor of botany at Padua. 

 Nat. ord., Pontederiads [Pontederia- 

 cere]. Linn., C)-Hexandrial-Mono(/i/)ii, ) 



Blue-flowered aquatics. Divisions of the 

 roots; rich, strong, loamy soil, in a tub of 

 water, or an aquarium. 



HAEDY AQUATICS. 



P, angustifo'lia (narrow-leaved). 2. July. N. 

 America. 1806. 



coeru'lea (light-blue). 2. July. N. America. 



1830. 



corda'ta (heart-teawd) . 2. July. N.America. 



1759. 



lanceola'ta (spear-head). 2. July. N. Ame- 



rica. 1815. 



STOYE AQUATICS. 

 P. axu'rea (sky-blue). . July. Jamaica. 1824. 



cra'ssipes (thick -leaf- stalked). f. May. 



Guiana. 1825. 



dilata'ta (spreading). 2. July. E. Indies. 



PO'PULUS. Poplar. (From arbor- \ 

 populi of the Romans, or the tree of ! 

 the public ; the Turin poplar much ; 

 planted in their cities. Nat. ord., Wil- 

 loivworts [Salicacea?]. Linn., 22-Dicecia ; 

 7 -Octandria.) 



Hardy deciduous trees. Seeds, which should I 

 be sown in moist soil, slightly covered, but 

 shaded, as soon as the seeds drop from the 

 trees ; by cuttings of the ripened shoots ; also 

 by layers and suckers; a deep, moist, loamy 

 soil suits them the best, but they do not thrive } 

 well either in a very dry place, or in places 

 where there is stagnant water. 

 P. a'lba (white. Abeletree}. 40. March. Britain, i 



angula'ta (angular. Carolina}, 80. March. 



Carolina. 1738. 



balsami'fera (balsamic). 70. April. North i 



America. 1792. 

 fo'liis variega'tis (variegated- I 



leaved). April. 

 interme'dia (intermediate). April. 



" latifo'lia (broad - leaved). 40. 



April. 



suave'olens (sweet-scented). 70. 



April. Russia. 1825. 



{ mina'lis (twiggy). 40. April.! 



Altai, 1826. 



'M ] POK 



P. bet ul!f, t ' Hit. (Birch-leaved. Bla 



40. March. N. America. 

 ' Canark'n.iis (Canadian). March, Cana.in. 



ca'ndicans (whitish, heart - tened). so. 



March. N. America. 1772. 



cane'scens (hoary). 40. March. England. 

 \ ~~ arerifo'lia (Maple-leaved). 



! JEgypti'aca (Egyptian). Egypt. 



; : Arembe'rgioa (Aremberg). 1835. 



, Be'lgtca (Belgian;. S. Europe. 



1835. 



fiy'brida (hybrid). 40. April. Cau- 

 casus. 1816. 



i : ni'vea (snow-white). 



I pe'ndula (drooping-branched}. 



fastigiu'ta (pyramidal. Lombardy}. 70. 



March. Italy. 1758. 

 ! fus'mina (female). March. Italy. 



1838, 

 : Grce'ca (Greek. Athenian). 40. March. 



Archipelago. 1779. 



grandidenta'ta (large-toothed). 70. March. 



N. America. 1772. 



pe'ndula (drooping). 40. 



March. N. America. -1820. 



heterophy'lla (various-leaved). 70. March. 



N. America. 1765. 



laurifo'lia (Laurel-leaved). April. 



longifo'lia (long-leaved). April. America. 



1843. 



monili'fera (necklace-bearing). 70. May. 



Canada. 1772. 

 JAndleya'na (Lindley's waved - 



leaved}. April. Canada. 17/2. 

 variegu'ta (variegated - leaved). 



May. 



ni'gra (black). 30. March. Britain. 

 salicifo'lia (Willow -leaved). April. 



Floetbeck. 1834. 

 vi'ridis (green-leaved). April. Britain. 



pse'udo - balsami'fera (bastard - balsamic). 



April. America. 1843. 



tre'mula (trembling. Aspen}. 50. March. 



Britain. 

 leeviga'ta (smooth). 80. March. 



N. America. 1760. 



pe'ndula (drooping). April. 



supi'na (lying-down). March. N. 



America. 1824. 



tre'pida (trembling. American}. 30. North 



America. 1812. 



tri'stis (sad). April. N.America. 1843. 

 POEA'NA. (From poreno, to travel ; 



the twining stems extending far and 

 wide. Nat. ord., Bindiveeds [Convol- 

 vulaceee]. Linn., 5-Pentandria l-Mo- 

 nogynia. Allied to Convolvulus.) 



Stove evergreen, East Indian, white-flowered 

 twiners. Seeds, in a hotbed, and side, stubby, 

 short shoots, in sandy soil, under a bell-glass, 

 in heat; peat and loam. Winter temp., 50 to 

 55 ; summer, 60 to 85. 

 P. panicula'ta (panicled). October. 1823. 



volu'bilis (twining). 50. July. 1820. 

 POEANTHE'EA. (From poros, a pore 



or opening, and anthera, an anther or 

 pollen bag ; anthers opening by pores. 

 Nat. ord., Spurynuorts [Euphorbiaceftj], 

 Linn,, 5-Pcnta'ndria 3-ZVtyynifl.) 



