JO 
HNSON AND YORK. PLATE Xlt, 
ee 800 600 400 200 w. 0 200 E. 400 600 800 1000 1200 1400 E. 
3000 H Pia 
3000 N. 




2800 














2000 




1800 








1600 



1400 



1200 






























b 
neseqno\ \ SS 
LABORATORY wy 
1000 1000 
800 T 800 
600 if | 600 
N 
400 silt 400 
Beye 200N. 
ero. 4 oat 
Scale 1.4000 else \ Fe 
4 0 100-200-300 400 SOO FEET _| well ew WS a ean ‘ 0 
ELEVATIONS AND DEPTHS IN FEET 
[Lise lines (even feet) 
200 Tide lines (odd feet) 700 


ere 
| x |Location of range stake Se i 
400 | | STATION FOR \ 
400 


EXPERIMENTAL 
Lower limit of Spartina glabra EVOLUTION 
Penn Limits of Zostera marina 

600 S. 


600 S, 





x —l 4 
1000 W. 800 600 400 200 W. 0 200E 400 600 800 1000 1200 1400 E. 
Map or InnER Harpor, CoLtp Spring Harsor, Lone Istanp, New Yorx. 
By Duncan 8S. Jonnson AND HArian H. Yor, 
This map shows the distribution of the vascular plants, found between tide marks, that are associated with fresh water, 
i. e. that grow in soil of which the soil water is made practically tresh by the proximity of rivulets or seeping fresh water. 
The plants in question are: Aspidium, Hibiscus, Impatiens, Iris, Lilaeopsis, Sambucus, Scirpus americanus and S. robustus. 
The symbols (printed in green) tised to indicate the position of specimens, or groups, of these plants are those given 
in table F. 

