BOTANICAL PAPERS AT BUFFALO? 
BOTANICAL SOCIETY OF AMERICA. 
Conway MacMitian: On the distribution of plants in a fresh- 
water insular region— The locality studied was Lake of the 
Woods, with its thousands of islands, varying in size from mere 
rocks to areas hundreds of square miles in extent. A general 
survey of the geological conditions shows that drift is sparingly 
distributed. According to vegetation the following types ° 
islands were noted: (1) floating bog islands, (2) Scirpus and 
Phragmites islands, (3) sand dune_ islands, (4) irregular 
creviced-rock islands, (5) dome-shaped rock islands, with of 
without drift sheets. 
The strand flora was discussed as (1) beach formation and 
(2) shore formation. In the beach three areas or zones of dis- 
tribution were defined: (a) front strand, (4) mid strand, (4) 
back strand. Strand pools with concentric zones of dase 
were described as a feature of mid strand. Three tyP® = 
strand vegetation in general were defined: (a) Cornus strand 4 
(4) Salix strand, (c) Prunus strand. A discussion of pee 
ditions under which beach formations arose was given, with — 
erence to drift distribution and wave action. Beat 
The shore formations were discussed briefly, attention — ; 
given to surf plants, such as Scirpus, Phragmites, and pa 
salicifolia. Gullies crossing a strand or shore, and the em 
in the distribution of shore plants consequent upo? asc ae 
ence, were described in outline. 
It was shown that the islands with rock cones could ie 
sified either as irregular or as dome shaped. The we : 
a remarkable zonal distribution of plants due to gradual wards 
mation and the silting off of the soil ina regular yee 
*In almost every case the abstracts given have been prepared by ee orssBet 
218 e 
be clas- : | 
