Lange: REVEGETATION OF TRESTLE ISLAND. 625 



The East Section from August 14 to 16, 1899. The great di- 

 versity of plant life on this section already referred to continued 

 for this season. In this diversity and in the comparative pau- 

 city of trees it presented a striking contrast to the West section, 

 where all true land herbs struggled under the over-shadowing 

 trees. 



On the East section, peach-leaved willows dominated the 

 south corner. A crescent, which under the effect of higher 

 water, formed last year a dense rice marsh, with a thick tan- 

 gled undergrowth of water hoarhound and mad-dog skullcap 

 is now a meadow of tangled rice cut-grass (ffomolocenchrus 

 oryzoidcs]. The remainder of the section is covered by a very 

 much mixed vegetation, amongst which peach-leaved willows, 

 slender pink persicaria, giant sunflower, a few specimens of 

 wild rice, and cattail are most conspicuous although not most 

 numerous. 



The most notable changes, besides the one of the rice marsh 

 to a cut-grass meadow, are the complete disappearance of 

 water-lilies, wild rice, and common rush from the higher ground, 

 the appearance of slender pink persicaria on well-marked areas, 

 and the establishment of willow domination in the south corner. 



Not a hand's breadth of bare soil is any longer visible on 

 either section, except in deep crevices. To show clearly the 

 distribution of plant life on this section in midsummer of 1899, 

 I give here the result of a count made on August 16, 1899. 



I. Plants established in large numbers and forming the bulk 

 of the vegetation. 



1. Peach-leaved willow (Salix amygdaloides). In the south 

 corner. 



2. Rice cut-grass (ffomolocenchrus oryzoides). On an east 

 crescent. 



3. Slender pink persicaria (Polygonum incur natuni). In 

 well-defined patches. 



4. Mad-dog skullcap (Scutellaria later if olio). General 

 under the taller plants. 



5. Cut-leaved water hoarhound (Lycopus americanus). 

 General under taller plants. 



6. American wild mint (Mentha canademis). General under 

 taller plants. 



7. Common ragweed (Ambrosia artemisi&folia}. On high- 

 est ridges, where common rush grew in '98. 



