(8) 



TRIANDRIA. 

 I. Monogynia. 



A. Floral parts complete, superior. 



1. Plectritis. — Limb of calyx obsolete. Co- 

 rolla gamopetalous, calcarate. 



B. Floral parts complete, inferior, 



1. Montia. — Calyx 2-sepalous. Corolla cleft 

 on one side, 5-parted. 



C. Floral parts iTicomplete. 



a. Perigonium petaloid. 



1. Iris. — Perigonium 6-parted, superior, 



alternate lobes reflexed. 



2. Scoliopus.— Perigonium 6-sepalous infe- 



rior, alternate lobes reflexed. 



3. Brodic^a. — Perigonium 6-parted. infe- 

 rior. Stamens alternating with stamino- 

 dia. 



b. Perigonium herbaceous. 



1. Acaena. — Calyx lobes valvate, tube spi- 



nose. Fruit an akene enclosed in the 

 calyx. Style terminal. 



2. Chenopodium. — Perigonium 3-5-parted, 



not appendiculate. Fruit a compressed 

 utricle enclosed in the perigonium. 



