110 GENERA IN CLASS XXI. MONCECIA. 



Bcemeria...Procris...Tricera... Pachysandra...Empleurum... 

 Alnus (alder) ...NAJAs...and Argythamnia. 



Order 5. Pentandria, comprehends such plants as have the 

 male flowers furnished with jive stamina. This order contains ten 

 genera, viz. Xanthium... Ambrosia;..Amaranthus... Nepheli- 

 um... Clibadium... Crotonopsis... Polychroa... Luffa...Fran- 



SERIA...and SCHISANDRA. 



Order 6. Hexandria, comprehends such plants as have their 

 male flowers furnished with six stamina. Of this order there are 

 nine genera, viz. Zizania...Pharus...Sagus (sa«'o)...Cocos (co- 

 coa). ..Elate. ..Bactris... Guettarda... EpiBATERiuM...and Po- 



METIA. 



Order 1. Polyandria, comprehends such plants as have their 

 male flowers furnished with many stamina. This order contains 

 twenty-six genera, viz. Ceratophyllum (hornwort)...M.YniopRYL~ 

 lum (water-milfoil) . . .Sagittaria (arrow-head) . . .Begonia . . .The- 

 ligonum... Poterium (burnet)... Quercus (oak) ... J uglans (wal- 

 nut)... Fagus (beech) ... Custanea (chestnut),.. Corylus (hazel)... 

 Carpinus (hornbeam).*.. Betula (birch)... Platanus (plane-tree) 

 ...Arum*...Caladium...Thoa...Salisburia (maiden-hair tree)... 

 Hedyosmum...Acidoton... Mabea... Pariana.. .Garcia... Ma- 

 nicaria. ..Caryota.. .and Liquidambar. 



Order 8. Monadelphia, comprehends such plants as have their 

 male flowers furnished with one set of united stamina. This order 

 contains twenty-seven genera, viz. Hura (sand-box tree)... Pinus 

 (pine, fir, /ftrt7<)...CupREssus (cypress)... Thuja (arbor vitce)...AcA- 

 lypha...Dalechampia...Plukenetia...Cupania... Croton (tal- 

 low -tree)... Ri cinus (pahna Christi)... Jatropha (physic -nut)... 

 Sterculia...Hippomane (manchineel-tree). ..Stillingia...Gnetum 

 <>. .C ytinus. . .Bradleya. . .Nissa . . . Areca (cabbage-tree)...GLEOKO- 



* This was contained formerly in the class Gynandria, but was altered by Wil- 

 ienow, and others, into this class. Editor. 



