353 



List of^ the: Spkcies of Pi^ants Growing on the: Bkach Arka 



This list is arranged in systematic order, with the collection num- 

 bers of those collected. The nomenclature is that of Gray's Manual, 

 7th edition. Synonyms are given in parentheses. 



Thai^lophyta 



Chlamydomonas sp. ? 



Oscillatoria sp. ? ^ 



Chara sp. ? (3202) 



(No other genera of algae were determined) 



bryophyta 



Riccia fluitans h. (3217) 



Marchantia polymorpha L. (315 1) Liverwort 

 Polytrichum juniperinum Willd, (2744) Moss 

 (No other species were determined) 



PTERIDOPHYTA 



Polypodiaceae. Fern Family. 



Pteris aquilina L. Bracken Fern 



Aspidium thelypteris (L.) Sw. (2501, 2801, 2929) Marsh Fern 



Osmundaceae. Flowering Fern Family. 

 Osmunda regalis L. (O. spectabilis Willd.) (1652, 2765) Royal Fern 



Equisetaceae. Horsetail Family. 



Equisetum arvense L. Horsetail 



Equisetum laevigatum A. Br. Scouring rush • 



Equisetum hiemale L. (3041) Scouring rush 



SPERMATOPHYTA 



Pinaceae. Pine Family. 



Pinus strobus L. (-2483, 2809, 2905) White Pine 

 Pinus laricio Poir. (2841, 2903) Austrian Pine 

 Pinus silvestris L. (3165, 3205) Scotch Pine 

 Pinus sp. 

 Larix decidua Mill. (2460, 2842) Tamarack 



