ARTIFICIAL KEY TO 0RDER5. 



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CLASS I. Monocotyledonere Fibrovascular bundles of stem dis- 

 tributed irregularly through the pith. Venation usually nerved. Parts 

 of the Mower often in three's. 

 Flowers without a perianth, in the axils of small bracts. 



A scale above each flower, leaves 2-ranked, sheaths split 



Gramineae 1 



No scale above the flower, leaves 3-ranked, sheaths entire, 



Cyperaceae 2 

 Flowers naked, monoecious, gathered in a fleshy spike surrounded by a 



spathe Araceae 3 



Flowers provided with a proper perianth, divisions 6. 



Perianth scale-like Juncaceae 5 



Perianth not scale-like. 



Three outer divisions green, 3 inner petal-like. .Gommelinaeew 4 

 Divisions similar. 

 Ovary superior. 



Leaves provided with tendrils Smilaceae 7 



No tendrils Liliaceae 



Ovary inferior Iridaceae 8 



CLASS II. Dicotyledoneae. Fibrovascular bundles of stem 

 arranged in a ring. Venation reticulate. Parts of flower usually in 

 four's or five's 



Suhclass I. Archichlamydese. Corolla if present, of seperate 

 petals 



I. C*lyx and Corolla present. 



1. Stamens more than ten (cf. Schrankia, which sometimes has more 



than ten stamens). 

 Separate. 



Inserted on the receptacle. 



Herbs liav unculaceae 23 



Small tree Aiwnaceae 22 



Wordy vine Menispermdceae 24 



Inserted on calyx '. Rosaceae 30 



United in a column (monadelphous) Mnlvaeeae 43 



2. Stamens not more than 10. 



As many as petals and opposite them. 



Woody vines provided with tendrils Vitaceae 42 



Shrubs, not climbing Rhamnaceae 41 



When as many as petals alternate with them. 

 A Ovary superior. 



Simple; stamens 10; flowers usually papilionaceous. . Leguminoscu 31 



