42 Aizoaceae, Portulacaceae 



Suborder 2. *Phytolaccineae. Flowers haplo- 

 or heterochlamydeous with a tendency to spiral arrange- 

 ment of parts. StaiJie7is sometimes numerous. Carpels 

 sometimes only slightly united. 



Fam. 3. *AlZ0ACEAE. Usually herbs, often with 

 fleshy leaves. Stipules absent or scarious. Flozvers 

 usually haplochlamydeous. Perianth segments free or 

 united, sepaloid. Stamens 5 or more, the outer ones 

 sometimes represented by petaloid staminodes. Carpels 

 (2-00 ). Ovary 2-co -loc, rarely i-loc. Placentation 

 basal or free central (parietal in Mesembryanthemicin). 



Tribe Mesenibryanthemeae, Ovary inferior. Sta- 

 minodes present or not. 



Staminodes very numerous, petaloid. 



*Mesembryanthemum. 



Suborder 3. PORTULACINEAE. Flowers hetero- 

 chlamydeous. Sepals^ 2. Petals 4-5. 



Fam. 4. Portulacaceae. Herbs with entire fleshy 

 leaves and scarious stipules. Flowers hermaphrodite, 

 heterochlamydeous. Sepals 2. Petals 4-5, free or con- 

 nate below, deciduous. Stamens 5-00 . Carpels (3-5) 

 with 2-00 ovules on a basal placenta. Fruit capsular. 



A. Stamens 3-5. Ovary superior. 



Petals free, stamens 5. *Claytonia. 



Petals connate, stamens 3. Montia. 



B. Stamens numerous. Ovary subinferior. 



*Portulaca. 



t These structures may also be regarded as bracteoles. In the 

 N. Am. genus Lewisia they are 4-8 in number, subulate, and 

 placed on the scape below the insertion of the perianth. 



