2 2 A raceae 



dominant^ but numerous stamens and more thati three 

 carpels often occur. (For a see page lO.) 



Order 4. Spathiflorae. Mostly sympodial, rarely 

 forming erect stems. (The Lemnaceae are free floating 

 and undifferentiated.) Floiuers cyclic, haplochlamydeous 

 or diplochlamydeous, homochlamydeous or naked, 3-2- 

 merous, hermaphrodite or diclinous, often very reduced, 

 always inserted on a spadix more or less enveloped by 

 a bract {spathe). Floral bracts absent. 



Fam. I. A RACEAE. Mostly herbs. Rhizome often 

 tuberous. Leaves often with netted veins. Flowers 

 mono- or diclinous, rarely dioecious, 2-3-merous, or re- 

 duced sometimes to a single sta7nen or carpel. Fruit 

 usually a berry. Seed with fleshy outer integument. 



Subfamily i. Pothoideae. Land plants. No latex 

 or raphides present. Leaves distichous or spiral. Lateral 

 nerves of 2nd and 3rd order usually netted. Flowers 

 mostly hermaphrodite. 



Tribe I. Acoreae. Leaves not differentiated into 

 stalk and lamina. Periatith present. Ovules ortho- 

 tropous. 



Only British genus : ©Acorus. 



Subfamily 2. Aroideae, Mostly tuberous land or 

 marsh plants with netted leaves. Latex present. Flowers 

 diclinous. Perianth usually absent. 



Tribe 2. Areae. Spadix mostly with vestigial 

 flowers. Gynaecium of one carpel. 



Only British genus : Arum. 



