CD 



ARTIFICIAL KEY TO ORDERS. 



CLASS I. Monocotyledoneae Fibrovascular bundles of stem dis- 

 tributed irregularly through the pith. Venation usually nerved. Parts 

 of the ttower often in three's. 



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

 A scale above each flower, leaves -!-ranked. sheaths split 



Oramineac 1 

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



Cypemceae 2 

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



spathe Araceue 3 



Flowers provided with a proper perianth, divisions 6. 



Perianth scale-like Jnncaceae 5 



Perianth not scale-like. 



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

 Divisions similar. 

 Ovary superior. 



Leaves provided witli tendrils Smilaceae 7 



No tendrils LUiaceae (5 



Ovary inferior Iridaceae 8 



CLASS IP Dicotyledoneae. Fibrovascular bundles of stem 

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

 four's or five's 



SuRt'LASs L Archichlamydese. Corolla, if present, of seperate 

 petals. 



I. Calyx and Corolla present. 



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



than ten stamens). 

 Separate. 



Inserted on the receptacle. 



Herbs lianuncnlaceae 23 



Small tree Anonaceae 22 



Wo( dy vine Mer)isperm((ceoe 24 



Inserted on calyx Homeeae 30 



United in a column (monadelphous) Mdlrncene 43 



2. Stamens not more than 10. 



As many as petals and opposite them. 



Woody vines provided with tendrils Vitaceae 42 



Shrubs, not climbing. Rliamnacene 41 



When as many as petals alternate with them. 

 A Ovary superior. 



Simple; stamens 10; flowers iisually papilionaceous. .//e7)mmio.s'ar' 31 



