207 



were other low herbaceous plants of which the most abundant 

 were Mimiilus glahratiis jamesii, Galium trifidum, Poa sp., Eupa- 

 toruim perfoUatum and Aspidium thelypteris. Less important 

 species were Pilea pumila, Impatiens hiflora, Bidens vulgata, 

 Scutellaria lateriflora, Carex lurida, Bidens comosa, Veronica 

 scutellata, Saururus cernuus, Eupatorium sp., Oxypolis rigidus, 

 Peltandra virginica, Rumex Britannica , Iris versicolor, Sagittaria 



Fig. 2. A portion of the cold-spring area showing Berula erccta with Mimu- 

 lus glabratus jamesii and the inroad of swamp plants on the side away from the 

 springs. July 24, 1910. 



brevirostra, Agrostis alba, Cicuta bidbifera, Boehmeria cylindrica, 

 Ranunculus pennsylvanicus , Steironema ciliatum and Cinfia arun- 

 dinacea. (Fig. 2.) 



In a few places in the Berula area there are invading thicket 

 plants which indicate the trend of succession. The thickets are 

 usually formed by Salix with Sambucus but three were formed by 

 very dense recurving growths of Decodon verticillatiis about 1.9 



