1915] 



BESSEY — PHYLOGENETIC TAXONOMY 139 



Family 136. Aizoaceae. Herbaceous or shrubby plants with 

 mostly opposite or verticillate, often fleshy leaves; calyx 

 tetramerous or pentamerous; corolla often wanting; ovary 

 mostly 2-5-celled with few to many ovules in each cell ; seeds 

 endospermous. Mollugo, Sesuvium, Mesembrianthemum. (Pf. 

 3 lb :33.) 



Family 137. Frankeniaceae. Herbs and undershrubs with 

 opposite leaves, and perfect flowers ; petals 4-5, long-stalked ; 

 ovules many, on 2-4 parietal placentae; seeds endospermous. 

 Frankenia. (Pf. 3 8 :283.) 



Family 138. Tamaricaceae. Tamarixes. Shrubs and herbs 

 with minute, alternate, deciduous leaves and mostly racemose, 

 perfect flowers; petals 5; ovules many, on 2-5 parietal pla- 

 centae; seeds hairy-tufted; endosperm 0. Tamarix. (Pf. 3°: 



289.) 



Family 139. Salicaceae. Willows. Shrubs and trees with 

 large alternate leaves and racemose flowers ; perianth ; ovules 

 many, on 2-4 parietal placentae; seeds hairy-tufted; endo- 

 sperm 0. Here regarded as reduced, dioecious, apetalous, 

 Tamaricaceae. Salix, Populus. (Pf. 3 1 : 29.) 



Family 140. Podostemonaceae. Riverweeds. Small aquatic, 

 sometimes thallose, plants ; flowers perfect or diclinous ; peri- 

 anth ; pistil 1-3-celled ; ovules many, centrally attached ; en- 

 dosperm 0. Podostemon. (Pf. 3 2a :l.) 



Family 141. Hydrostachydaceae. Large tuber-forming 

 Madagascar plants, with naked, dioecious flowers, single 

 stamens, and numerous ovules on 2 parietal placentae; en- 

 dosperm 0. Hydrostachys. (Pf. 3 2a :22.) 



Family 142. Phytolaccaceae. Pokeweeds. Herbs, shrubs, 

 and trees with usually alternate leaves; petals (or 4^5); 

 carpels several, distinct or nearly so, 1-ovuled; seeds endo- 

 spermous. Phytolacca. (Pf. 3 lb :l.) 



Family 143. Basellaceae. Herbaceous climbing plants, with 

 mostly alternate leaves ; calyx dimerous ; corolla pentamerous ; 

 stamens 5; ovary tricarpellary, 1-celled, with one ovule; en- 

 dosperm scanty. Basella, Boussingaultia. (Pf. 3 la :124.) 



