14 B 



Canadian Arctic Expedition, 1913-18 



Omnes ipsa basi integra; ligula subquadrata tam lata quam longa, apice dentata 

 dente medio paulo longiore. Panicula erecta, angustata, oircumscriptione 

 lineari-lanceolata, ramis paucifloris, pedicellis denticulatis, strictis, viridibus, 

 apice paulo dilatato, cum locusta haud omnino continuo. Locustae hyalinae, 

 glaberrimae, uninerviae, cum pedicellis persistentes, valvula inferiors fere 

 dimidio minore; superiore duplo latiore et fere duplo longiore, obtusiore, peri- 

 anthio dimidio circiter breviore, nervis lateralibus obsoletis. Perianthia separ- 

 atim decidentia, rachi locustae glabra; valvula inferior oblonga, concava, acutius- 

 cula, apice scarioso eroso-denticulato, quinquenervis, lateribus infra medium 

 pube rara in nervis extimis crebriore instructis, ipsa basi absque lana implexa; 

 superior paulo brevior, dinervis, nervis viridibus, denticulatis, lateribus com- 

 plicatis. Lodiculae 2, hyalinae, imberbes, semibifidae. Stamina 3." 

 According to Lange the species is a near ally of G. Vahliana. 



Glyceria paupercula Holm (in Fedde, Report. Ill, 1907) (Fig. A: 16-17). 



"Caespitose, perennial: culms low, curved or decumbent, mostly leafy 

 to the panicle, the base of which is often enclosed in the leaf -sheath; leaves 

 narrow, flat, glabrous, the blade about as long as the sheath; panicle pyramidal 

 and open during anthesis, more or less contracted afterwards; spikelets three 

 to four-flowered, seldom five-flowered; empty glumes unequal, the lower the 

 shorter, both much shorter than the spikelets; flowering glume pointed, carinate, 

 glabrous, five-nerved; palea bidentate, glabrous. 



"It is a member of the section Atropis Rupr. 



"Mansfield island, Hudson bay; collected by Dr. R. Bell." 



Since I described this species a revision of the genus Pucdnellia in eastern 

 North America has been presented by Fernald and Weatherby, in which several 

 new stations have been recorded from the coasts of Labrador, Keewatin, New- 

 foundland and Quebec, besides that two varieties have been described by these 

 authors: alaskana (Scribn. et Merrill), new comb., and longiglumis n. var., the 

 latter from Prince Edward island. 



According to the revision, cited above, the var. alaskana has been passing 

 very generally in eastern America as Pucdnellia angustata, based upon Poa 

 angustata R. Br., as for instance, by Simmons (Vascular plants, Ellesmer eland, 

 1906), whose specimens thus belong to the variety of paupercula. 



Glyceria arctica Hook. (Fl. Bor. Am. II, p. 248.) (Fig. C). 



1. Spikelet. 



I 



Figure C. — Glyceria arctica Hook. (Greenland). 

 2. Empty glumes. 3. Flowering glume, side-view. 4. Same, dorsal view. 

 (All figures enlarged.) 



6. Palea. 



