1916] Fernald & Weatherby, — Puccinellia 21 



between the lemmas at anthesis: 1st glume 3^1 mm. long, obtuse or 

 acutish; 2d 7-9 mm. long, 3-5-nerved, oblong-lanceolate, acute or 

 acuminate, about equaling or longer than the adjacent lemma: lemma 

 4.5-6 mm. long, 7-nerved, elliptic-ovate; palea 3^4 mm. long: anthers 

 0.7-1 mm. long: grain 2.2-2.6 mm. long. — Prince Edward Is- 

 land: salt marsh, Bunbury, August 9, 1912, Fernald, Long & St. 

 John, no. 6,920; border of salt marsh, Bunbury, August 28, 1912, 

 Fernald, Long & St. John, no. 6,921 (type in Gray Herb.). 



In its extreme development (no. 6921) var. longiglumis seems 

 sufficiently unlike var. alaskana or the tiny-flowered typical P. pauper- 

 cula for specific separation, but numerous collections not only from 

 Prince Edward Island but from the mainland show clear intergrada- 

 tion. 



Var. alaskana, as it occurs on the Pacific coast, often has the lemmas 

 firmer and the panicle-branches more spreading than in much of the 

 eastern material, but both these characters reappear in many eastern 

 colonies, leaving no character upon which the Atlantic and Pacific 

 coast plants seem to be distinguished. 



In publishing P. maritima, var. (?) minor Watson cited two speci- 

 mens: "Shore of Mt. Desert Island (E. L. Rand); Labrador (J. A. 

 Allen)." The Mt. Desert plant labeled in the Gray Herbarium by 

 Watson is var. alaskana, while the Labrador plant of Allen (from 

 Salmon Bay, Saguenay County, Quebec) is the little northern plant 

 subsequently published by Holm as Glyccria paupercula. The descrip- 

 tion of P. maritima var. (?) minor, is clearly based upon the Allen 

 plant, having "spikelets 2^-flowered, the flowers 1" long or less" 

 so that the Allen plant stands as the type of var. minor. 



Var. alaskana has been passing very generally in eastern America 

 as P. angtistata, based upon Poa angustata R. Br., but examination of 

 a duplicate type of Brown's species, preserved in the Gray Herbarium, 

 shows it to be a very distinct species, which is unknown to us from 

 south of Arctic America. The plant is beautifully illustrated in Flora 

 Danica, t. 3006, as Glyccria angustata; and it differs from all forms of 

 the more southern P. paupercula in the erose-serrulate and coarsely 

 toothed obtuse to subtruncate lemma pubescent on the nerves, and 

 in the scabrous pedicels (figs. 59-62). Outside Greenland and Spitz- 

 bergen where the species has been frequently collected, it seems to be 

 rare. We have examined American specimens from Goose Fjord, 

 Ellesmereland, August 15, 1901, H. G. Simmons, no. 3,436 (herb. 

 Geol. Surv. Can. no. 80,635); Beechy Island, Lancaster Sound, 



