STATISTICS OF METASPERMAE. 



731 



In the first table there appears in the third column of figures 

 a further verification of the statements previously advanced 

 regarding the relative extent of distribution of the Monocoty- 

 ledones, as a group, and of the Metachlamydeae. While 34.7 

 per cent, of all monocotyledonous species are of extra- conti- 

 nental range, 28.3 per cent, of the Archichlamydeae, and but 

 18.6 per cent, of the Metachlamydeae are of such range. The 

 Archichlamydeae, from their absolute numerical preponderance, 

 form the largest percentage of the extra continental element. 

 The Metachlamydeae, both absolutely and according to their 

 number, form the smallest percentage. A comparison with 

 the table which gives the general taxonomic-group percent- 

 ages of the total valley species will be instructive. While the 

 Monocotyledones form 28.4 percent, of the total species they 



