354 OCTANDRIA MONOGYNIA. 



specie.. MONOGYN1A. ( ^^/ 



183. TRIENTALIS. Chick-weed winter-gieen. 



T americana : leaves narrow-lanceolate, acuminate, serrulate ; petals 



acuminate. 

 HAB. WOOD'S and swamps. TJ.. May June. Leaves whorled 



^flower solitary, -white. 



OCTANDRIA. 

 MONOGYNIA. 



Qenera. * f^ owers superior. 



184. RHEXIA. Calyx urceolate, 4 5-cleft; petiole 4, inserted upon 

 the calyx ; anther incumbent, attached to the filaments behind, na- 

 ked at the base ; capsule setigerous, 4-celled, free in the ventricose 

 calyx ; receptacle lunulate, pedicellate ; seeds numerous. 



185. GENOTHERA. Calyx tubular, 4-cleft; segments deflexed, decid- 

 uous ; petiole 4 ; stigma 4-cleft ; capsule 4-celled, 4-valved ; seed* 

 naked, affixed to a central, 4-sided receptacle. 



186. GAURA. Calyx 4-cleft, tubular; corolla 4-petaled, ascending; 

 nut quadrangular, 1-seeded. 



187. EPILOBIUM. Calyx 4-cleft, tubular; corolla 4-petaled ; capsule 

 oblong, inferior; seeds comose. 



188. OXYCOCCUS. Calyx superior, 4-toothed; corolla 4-parted; 

 segments sublinear, revolute ; Jilament connivent ; anther tubular, 

 2-parted ; berry many-seeded. 



* * Flowers inferior. 



189. ACER. Flowers mostly polygamous; calyx 5-cleft , pet. 5 orO; 

 samara 2, winged, united at the base by abortion, 1-seeded. 



190. DIRCA. Calyx 0; corolla tubular; border obsolete; stam. un- 

 equal, exserted ; berry 1-seeded. 



TRIGYNIA. 



191. POLYGONUM. Perianth 5-parted, petaloid, inferior; nut 1- 

 seeded, mostly angular. 



MONOGYNIA. 

 specie.. 184. RHEXIA. _ P 



R. virginica stem "with winged angles, somewhat hairy ; leases sea 



