STATISLICS OF METASPERMAE. 651 
11. The Northern Generic Element. 
No. of |Per cent. of all} Northern per 
genera.| Northern. cent. of each. 
Monocotyledones............ 50 30.6 47.6 
Archichlamydeae ........... 67 41.6 37.9 
Metachlamydeae............ 46 28.2 35.9 
Total Northern........... TGS: 5 ) Il Sestesensnsetaca Soabiorentes | Wtedasuacantondacensae 
Northern per cent. of 
all genera...... OOD: | ceseiniiasra tases wien |pebiea butane 
In the above the 47.6 per cent. of monocotyledonous genera 
that range north rather than south is interestingly in excess of 
the 87.9 per cent. of Archichlamydeae and the 35.9 per cent. of 
Metachlamydeae. In the following table the preponderant 
southern ranges of the two higher groups of Metaspermae is 
indicated. 
12. The Southern Generic Element. 
No. of |Per cent. of all} Southern per 
genera. Southern. cent. of each. 
Monocotyledones ............. 62 24.3 59.0 
Archichlamydeae ............ 111 43.8 63.4 
Metachlamydeae ............. 81 31.8 63.2 
Total Southern ............ DBA: F |i) cnctensicealon Gauncn panes D sais cigstniys 
South’n per cent. of ail genera O22 lca sinwean anscnaslaeas eee oes clesine 
The excess of southern over northern ranges is observed 
from both tables, preceding. The differences are greatest for 
the Metachlamydeae, between 35.9 per cent. and 63.2 per cent., 
and least for the Monocotyledones, between 47.6 per cent. and 
59.0 per cent., respectively. This result is quite in keeping 
with the results previously obtained and indicates the greater 
cosmopolitan character of the Monocotyledones. Passing to 
the other two tables of this group we note the relation between 
eastern and western genera. 
