400 CLASS XXIII. ORDER I. 



Ground hemlock: The leaves, in their arrangement, resemble 

 those of Pinus Canadensis, but are larger. The fruit resembles 

 a berry, the seed being imbedded in the fleshy calyx. — Hollowell, 

 Maine. 



Class XXTII. POLYGAMIA. Perfect Jloivers to- 

 gether with barren, or fertile, or both, on the same 

 or distinct pl'oits. 



Order I. MONCECIA. Barren, fertile, and perfect 

 fowcrs, found on one plant. 



412. Celtis. Perfect flowers, calyx five parted ; 

 corolla none; stamens five; styles two; drupe one 

 seeded. Barren flowers, calyx six parted; corolla 

 none ; stamens six. 



413. Atriflex. Perfect flowers, calyx five parted ; 

 corolla none ; stamens five; style two parted ; seed 

 one depressed. Fertile flowers, calyx two leaved ; 

 corolla none ; style two parted ; seed one compressed. 



414. Veratrum. Calyx none ; corolla six parted; 

 stamens six. Perfect flowers, pistils three ; capsules 

 three ; many seeded. Barren flowers containing the 

 rudiment of a pistil. ' 



Order II. DIQ^CTA. Barren, fertile, and perfect flovfers 

 on diferent plants. 



415. Panax. Umbel simple. Perfect flowers, ca- 

 lyx five toothed, superior ; corolla five petalled ; sta- 

 mens five ; style two ; berry two seeded. Barren 

 flowers, calyx entire ; petals five ; stamens five. 



416. Xanthoxylum. Calyx inferior, five parted ; 

 corolla none ; flowers barren, fertile, and perfect ; cap- 

 sules from tliree to five, one seeded. 



