662 Harshberger: Plant formations of Nockamixon Rocks 



drangca arboresccns^ Acer spicatmn^ Taxiis canadensis^ and the 

 jewel weed, Tmpatiens ftdva^ together with the ferns, Polysticlmm 

 acrosticlioides and Polypodiiun vulgare^ which adorn the tops of the 

 projecting slate rocks. Anipclopsis quinquefolia drapes the mossy 

 rocks of the ravine. The distribution of the mosses on the rocks 

 is determined by the places where in midsummer the last water is 

 found, in small trickling streams affording sufficient moisture to 

 keep the mosses alive, while the rock-faces, where the stream, 

 when full, falls over the slopes, are practically without any mossy 

 covering. 



Ravine rock mosses: The mosses and hepatics found on the 

 rocks of the ravines, according to Lydia P. Borden, are : (Hepa- 

 ticae) MarcJiantia poIymorpJia^ Conocephahtm co7iinnn\ Pellia epi- 

 phylla^ Metzgeria conjngata^ Cephalozia cnrvifolia, Lophocolea 

 hcterophylla^ Gcocalyx graveohns^ Odontoschisvta prostratiim. Sea- 

 pania nemorosa^ PlagiocJdla porelloidcs, P. asplenioides, Porella 

 platyphylla ; and (Musci), Catharine a undid ata^ Fissidens bryoides^ 

 DicraJiella hcteromalla, Fnnaria hygrovietrica^ Anlaeonininm 

 palnstre, Pldlonotis fontana (wet rocks), Brynni argenteum^ B. 

 roseum^ B. caespiticiinn^ Mninm sylvahciun, M. ptinctatinn, Anonio- 

 don apiculatus^ A. rostratus. A, attenuahis, Thtddiiun delicatuluni, 

 Climadum americanum^ C, dcndr aides, Cirriphyllnm Boscii, and 

 Plagiothecinm denticidatnm. 



In addition to the species mentioned in the above description, 

 the ravine flora includes, according to Dn S. P. Seese, of Lans- 

 dale, Pennsylvania : 



Osniunda regalis^ 



it 



cinnaniomea 



I 



Aspleninni Filix-focmina^ 

 Dryoptcris novcboracensis^ 



It 



ti 



ti 



spinulosa^ 



spin 2d OS a var. inter- 

 media^ 

 siimdata^ 



Goody era pnbescens^ 



Adliunia cirrhosa (A.fnngosa)^ 



Cercis canadensis, 



Cornns alternifolia^ 



Kalmia latifoUa, 



*' angnstifolia^ 

 Senecio oboz^atus}^ 

 Nabalns altissinius. 



Covallorhiza odontorhiza^ 



bUMMIT-SLOFE AND CLIFF-CREST VEGETATION 



A^cending the hills back of the Narrows ville Hotel, the 

 botanist encounters a forest which covers the slopes up to the 



