1921] Fernald,— Expedition to Nova Scotia 133 



The party exploring about Truro had started out as a quartet, 

 following the shores of Salmon River and getting, in some of the 

 pools, Ranunculus Purshii and Myriophyllum alternifiorum, the 

 latter species seen by us nowhere else during the summer; but they 

 soon divided into pairs, Bean and White working down stream to the 

 extensive reclaimed marshes where they secured a representative 

 collection, but too largely weeds of civilization to require special 

 mention. Bissell and Linder soon found rich, hillside woodlands 

 and thiol ets and throughout the summer, whenever we were having 

 particularly meagre botanizing, they longingly referred to this hill- 

 side at Truro. There they added to our list Equisctum scirpoidcs, 

 Carex an ra, Ranunculus abortivus and other plants of rich soil not 

 found by us in the silicious country; and for the first time in the 

 summer, though we afterward got it in rich woods or in limy talus 

 at other stations, a very neat little Poa which I had long known as a 

 unique species characteristic of Newfoundland and Prince Edward 

 Island, in its stoloniferous habit the plant resembles P. pratensis, 

 but in the very short and stiffly spreading branches of the panicle, 

 its large lance-ovate, acuminate spikelets 5.5-7 mm. long, with very 

 thin and lustrous, strongly 3-5-nerved lemmas, which are conspic- 

 uously white-margined, the plant seems to stand well apart. In its 

 technical characters it apparently matches the plate in Flora Vomica 

 (t. 2402) of Poa costata Schumacher, 1 a little known and somewhat 

 problematic plant described from the island of Seiland in the Baltic. 

 In our northeastern coastwise region, Newfoundland, Prince Edward 

 Island and Nova Scotia (fig. 5), the plant is clearly indigenous and its 

 identity with a plant otherwise known only from the Baltic recalls 



'Poa costata Schurnach., Enura. PI. Saell. i. 28 (1801); Liebm. FI. Dan. fasc. 

 xli. t. 2402 (1845). P. pratensis, var. depaupcrata Liebm., 1. c. as syn. (1845). P. 

 pratensis, subsp, costata (Schumach.) Lange, Nomencl. Fl. Dan. 91, 203 (1887). 

 P. pratensis, var. costata (Schumach.) Lange, 1. c. 329 (1887). P. angustifolia var. 

 costata (Schumach.) Riehter, PI. Eur. 87 (1890). — The following American speci- 

 mens are referred here. Newfoundland: open woods, St. John's, August 4, 1894, 

 Robinson & Schrenk, no. 219, in part, distributed as P. pratensis and subsequently 

 given an ur published herbarium-name by Scribner; gravelly fir and spruce woods, 

 Clarenville, August 19 and 20, 1911, Fernald & Wiegand, no. 4,630. Prince Edward 

 Island: sphagnous clearings and thickets, Bloomfleld, August 7, 1912, Fernald, 

 Long & St. John, no. 6,897. Nova Scotia: sphagnous pockets in moist, rich woods 

 and thickets, Truro, July 18, 1920, Bissell & Linder, no. 19,995; glades by brook- 

 side in mixed woods, southern slope of North Mountain, north of Middleton, July 21, 

 1920, Long, 10. 19,998; open woods at base of gypsum cliffs. Port Bevis, August 27, 

 1920, Fernald & Long, no. 19,999. 



