The Flora of the Cayuga Lake Basin 65 



7. G. septentrionalis Hitchc. (G. fluitans, in part, of Cayuga Fl.) 

 Ditches on alluvial flats, and in mucky swamps; rare. June 15-July. 



N. e. of Negundo Woods (A. J. E. & A. Gcrshoy) ; near the Ithaca fair grounds 

 (C. Chupp) ; 2h miles n. w. of Waterloo (K. M. W '., A. J. E., & L. F. Randolph). 



N. E. to B. C, southw. to N. C, La., and Tex., including the Atlantic Coastal 

 Plain. 



8. G. borealis (Nash) Batch. (G. fluitans, in part, of Cayuga Fl.) 



Shallow water of boggy ditches and marshes, in calcareous regions ; scarce. June 

 15-July. 



Summit Marsh (£>.!) ; Jennings Pond; Dryden-Lansing Swamp? (£>.); Chicago 

 Bog; Cortland marl ponds (D. in C. U. Herb.) ; Montezuma Marshes. 



Newf. to Alaska, southw. to N. Y., Minn., Iowa, Colo., and Oreg. 



9. G. acutiflora Torr. 



Shallow water of boggy ditches and meadows, in slightly calcareous or even acid 

 waters; scarce. June 15-Aug. 15. 



Summit Marsh and vicinity ; Jennings Pond ; Slaterville Swamp ; South Hill 

 Marsh (£>.!), and pond one-half mile s. ; pool at foot of North Pinnacle, Caroline: 

 Ringwood Swamp; "marsh near the lake" (£>.). 



Me. to Ohio and Del., including the Coastal Plain. 



5. Puccinellia Pari. 

 a. Leaves of the culm 2-6 mm. wide, flat ; panicle 8-20 cm. long ; flowering glumes 



2-2.5 mm. long. 1. P. distans 



a. Leaves of the culm 2 mm. wide or less, becoming more or less involute ; panicle 



4-9 cm. long; flowering glumes 1.5-2 mm. long. la. P. d., var. tenuis 



1. P. distans (L.) Pari. 



Brackish meadows ; rare. June-Aug. 



Salty meadows e. of Montezuma village, where it is frequent. [Also at Syracuse, 

 N. Y.] 



Que. to N. Y., southw. to Del. ; also in Nev. Naturalized from Eurasia and 

 n. Africa. 



la. P. distans (L.) Pari., var. tenuis (Uechtritz) Fernald & Weatherby. (See 

 Rhodora 18 : 12. 1916.) 

 Brackish meadows ; rare. July-Aug. 



Meadows along Salt Creek, Montezuma, 1893 (IV. W. Rozvlce). 

 N. B., Mass., N. Y., and Out, to Wash. Naturalized from Eurasia. 

 In appearance this plant differs strikingly from P. distans. 



6. Poa L. 



a. Branches of the panicle solitary or in 2's ; low annuals with small panicles ; spike- 

 lets 4-5 mm. long ; flowering glumes plainly 5-nerved, at least when dry ; 

 marginal and mid-nerves hairy. 1. P. annua 



a. Branches of the panicle in 2's-5's ; perennials. 



b. Panicle rather narrow, the branches short, with clusters of spikelets at the axis ; 

 culms and sheaths compressed, 2-edged ; rootstocks extensively creeping ; plant 

 blue-green. 2. P. compressa 



b. Panicle broader and looser ; culms and sheaths not markedly, if at all, com- 

 pressed; rootstocks less prominent; culms usually more tufted. 

 c. Branches of the panicle in 2's. 



d. Intermediate nerves of the flowering glume very distinct; the whole glume 

 glabrous ; anthers yellow ; branches of the panicle nodding. 

 e. Flowering glumes obtuse, firm ; anthers 0.6-0.8 mm. long ; upper ligules 

 2-2.5 mm. long. 3. P. debilis 



