[Vol. 2 



292 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Tropical Atlantic and the Indo-Pacific regions with their 

 proper subdivision into provinces. Concerning these various 

 regions, it may be said that some seem to possess very dis- 

 tinct and characteristic species content while others are more 

 or less related to one another. However, it is expected that 

 there will be a possibility of discussing this segregation at 

 another time in more extended fashion. 



Of particular interest and importance in connection with 

 the marking off of floristic regions, are the points or areas 

 of demarcation. Some of these are well established while 

 others may be only more or less accurately surmised. One 

 of these much referred to in the literature (cf. Harvey, '58; 

 Farlow, '81; etc.) is Cape Cod on the eastern coast of Massa- 

 chusetts which divides so clearly and so accurately the flora 

 of northern New England from that of southern New 

 England. Cadiz in Spain appears to be another point of de- 

 marcation, or possibly indication of an area, where the flora 

 of the Southwestern European region stops, or mingles with 

 that of the Mediterranean-Northwest African region. At 

 Clare Island on the west coast of Ireland (Cotton, '12, p. 160) 

 the flora "resembles that of the southwest of England," but 

 it has elements also of a distinctly northern character. It is 

 probably in or near a demarcation area. Similarly southern 

 Norway and the west coast of Sweden (Kjellman, '02, '06; 

 Svedelius, '01; Kylin, '06, '07) have a mixed flora and are in 

 a transition region. 



In Japan Cape Inuboi on the east coast of Honshu (cf. 



Yendo, '02, p. 181) is a demarcation point and the Strait of 



Sangar (cf. Yendo, '02, p. 182) is also a region of demarcation 

 or transition. On the opposite side of the Pacific Ocean, along 



the western coast of North America, Cape Flattery or just 

 south of it, Point Conception, and the region about the mouth 

 of the Gulf of California are demarcation points or indicate 

 transition areas (cf. Setchell, '93, p. 370; Saunders, '01, p. 

 393; Setchell & Gardner, '03, p. 170). In the southern hemi- 

 sphere the marine flora of the Cape Rogion is definitely de- 

 limited both to the southwest and to the northeast and in 



