1921] Fernald, — Expedition to Nova Scotia 155 



found by us, but now, as it was maturing, becoming more obvious 

 than heretofore. Droscra longifolla and D. rotundifolia were, of 

 course, abundant but a plant which exactly combines their char- 

 acteristics and which is unquestionably a hybrid between them was 

 found on only one knoll. 



Suddenly Long remarked: "If we were in southern Jersey we 

 should call this Agrostw ehta." And surely that is what it proves 

 to be bur, instead of being confined to the Argyle barren A. data 

 Pursh, heretofore recorded from east of Long Island only on Nan- 

 tucket, 1 was found on all the boggy barrens from Digby and Yar- 

 mouth Counties to Queens. Dr. St. John got it on Sable Island; he, 

 Long and I collected it in 1912 on the Magdalen Islands and it is 

 common in Newfoundland. Many of the specimens are absolutely in- 

 separable from material from Pursh's type region (New Jersey), 

 but others have conspicuously awned spikelets. These vary in 

 length from 3.3-4 mm. and in this outlying Canadian and New- 

 foundlanc area the plant passes clearly into A. hyemalis and its var. 

 geminata (Trim) Hitchc. A. data seems, therefore, to be a coastal 

 plain extreme of A, hyemalis with very long spikelets, rather than a 

 variant of A. perennans with which Hitchcock unites it. 



Late in the afternoon, having made a good cross-section of the 

 barren, we turned toward the sea-shore and, in following a path 

 through an alder thicket, found a carpet of the European Potent ilia 

 procumhchs, here, as when we afterward saw it at Baddeck, too near 

 a cow-pa h for us to consider it indigenous. On the sea-beach 

 Rumex pallidas was in prime condition and Saarda amrricana was 

 maturing. We had scarcely begun observing the beach plants when 

 a downpour of rain warned us to hurry toward the village and the 

 station, but, in scrambling through the bushes above the beach, we 

 came upon such a handsome and now fully ripe colony of Carex 

 panicea that we temporarily ignored the rain to dig some good speci- 

 mens. 



The southern shore of Salmon Lake had yielded so many good 

 things that we were all anxious to see more of the sandy and peaty 

 beach, and especially to extend our exploration up the wholly unsettled 

 west side of the lake. So, on August 13, we landed at the brook 

 where Polygonum rcbustiw luxuriates. The boggy swale nearby had 



'Uicknell, Bull. Torr. Bot. CI. xxxv. 192 (1908). 



