1902] 



BRIEFER ARTICLES 



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Polypodiuni vidgare L. was found in one of the formations known 

 locally as ''rock cities/' flat hilltops of sandstone, broken so as to leave 





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Figs. 1-3. A^plenium pinnatifidum. 



Figs. 4-5. Polypodium vulgare acuminatum. 



parallel '* streets" twenty or thirty feet deep and not so wide at an ele- 

 vation of about 2000 feet. Typical plants were abundant. But in 

 one small patch, hardly more than ten feet square and covering one 

 free rock, there was a marked tendency toward pointed tips of the 



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