504 BOTANICAL GAZETTE [JUNE 
shape of a bow. The shores of the newly formed lake have steep, 
vertical sides on the outside of the stream curve. On the inside 
a 
eT 
Willew - thicked 
: : 1 ‘ 
Willow: whtched Willow - phicket , 
end meadow-acrub Ww 
ween, 
- 
Willow - thicket 
em ewer ewan ncee”” 
zt 
Willem -¢hicket 
end meadew-serub 
Willew-thicket 
« 
Meters 
Fic 
lake; male ceaeh occupies inch abcd; some water still flows through old iol 
gravel, sand, and fine silt; the bare soil is being invaded by a mixed association; 
shore no. III, a mud and sand flat under water a good part of the year; shore no. IV, 
cobblestone on which no = has secured foothold; shores nos. V and VI, 
pe icular erosion shores; “runs” of the kind shown at no. VII are common 
throughout the Park, being very narrow and ohh vertical walls. 
