268 



The water naturally Ijrinss in the algae, whicli grow in great variety 

 and alumdauce. Licliens are not very abundant and are usually found in 

 the higher parts. The peculiar soil formed from powdered limestone 

 forms a muck in which a few species of mosses grow, but not in great 

 abundance. A few very poor specimens of Equisetum arveuse were found 

 in qiiarry B. having come in from the gi-avel bed of the railroad which 

 runs on the north blutf of this quarry. 



i'ig. 2. 



Of the Spermatophytes the monocotyledons are the first to appeal-, the 

 hydrophytes leading and invading the ponds. Of these the rnost showy 

 is the Typha latifolia L. (Fig. 1), which was very abundant in all three 

 quarries. Ai-ound the margins of these ponds the sedges were vei-y 

 abundant, gradually giving way to the grasses a little farther back. 



Of the dicotyledons, the willoAvs (Salix sp.i and sycamore (Platanus 

 occidentalis L.) were the mo.st conspicuous (Figs. 1 and 2i. The willows 



