274 THE STORY OF PLANT LIFE 



IL FloridecB : Leaves parallel-veined; Floral Envelopes 

 whorled or wanting. 

 {a) Perianth superior, petal-like ; carpels syncarpous. 

 Hydrocharidacese. Amaryllidacese. 



Orchidaceas. 

 Iridacese. 



(b) Perianth inferior; carpels apocarpous, or carpels 



separable when ripe. 

 Alismaceae. 



(c) Perianth inferior ; carpels syncarpous. 



Asparagaceae. Juncaceae. 



Liliaceae. Eriocaulaceae. 



Melanthaceae. 



(d) Perianth wanting, or of four small scale-like 



parts. 

 Typhacese. Potamogetonaceae. 



Araceae. Naiadaceae. 



Lemnaceae. 



III. GlumifercB : Leaves parallel-veined^ persistent; 

 Floral Envelopes rudimentary or wanting; 

 Flowers covered by imbricate bract-like scales. 

 Cyperaceae. Gramineae. 



Bentham and Hooker adopt the following grouping. 



I. Perianth none, or of four small sepals or bracts. 

 Typhaceae. Lemnaceae. 



Aroideae. Naiadeae. , 



II. Perianth wholly or partially petal-like; Ovary 

 apocarpous. 

 Alismacese. 



