GRAMINEAE. 



VOL. I 



3. Puccinellia distans (L.) Parl. Spread- 

 ing Meadow-grass. Sweet-grass. Fig. 645. 



Poa distans L. Mant. 32. 1767. 



Glyceria distans Wahl. Fl. Ups. 36. 1820. 



Puccinellia distans Parl. Fl. Ital. I : 367. 1848. 



Culms i -2 tall, decumbent at the base, tufted,, 

 smooth and glabrous. Sheaths often shorter 

 than the internodes, smooth and glabrous ; ligule 

 \"-\" long; blades up to 4' long, i"-2" wide, 

 flat or folded, usually stiff and erect, smooth 

 beneath ; panicle 3'-?' in length, open, the 

 branches finally spreading, whorlecl, the lower 

 up to 42' long, sometimes reflexed, naked below ; 

 spikelets crowded, 3-6-flowered, \\"-2.\" long; 

 empty scales obtuse or acute, i-nerved, the second 

 exceeding the first and less than half the length 

 of the first flowering scale, the truncate flowering 

 scales \"-\" long. 



On salt meadows, sea beaches and in waste places, 

 Nova Scotia to Delaware. Probably naturalized 

 from Europe. Sea-meadow-grass. July-Aug. 



Puccinellia fasciculata (Torr.) Bicknell. 

 Torrey's Meadow-grass. Fig. 646. 



Poa fasciculata Torr. Fl. U. S. i : 107. 1824. 

 P. fasciculata Bicknell, Bull. Torr. Club 35: 197. 



1908. 



Culms i-2 tall; sheaths smooth and glabrous; 

 ligule about \" long, truncate ; blades erect, up to 5' 

 long, ii"-3" wide, smooth beneath, rough above; 

 panicle 3'-$' long, its branches spikelet-bearing to the 

 base, usually ascending; spikelets about 2" long, the 

 empty scales obtuse or acute, the second one less than 

 one-half as long as the first flowering scale, the 

 flowering scales i"-ii" long, obtuse or acutish, gla- 

 brous or nearly so. 



Salt marshes, Nantucket to New Jersey. May and June. 



5. Puccinellia airoides (Nutt.) Wats. &Coult. 

 Slender Meadow-grass. Fig. 647. 



Poa airoides Nutt. Gen. i : 68. 1818. 



Panicularia distans airoides Scribn. Mem. Torr. Club 



5:54. 1894. 

 Puccinellia airoides Wats. & Coult. in A. Gray, Man. Ed. 



6, 668. 1890. 



Culms i-4 tall, erect, simple, smooth and gla- 

 brous. Sheaths usually longer than the internodes; 

 ligule i" long; blades 2 f -6' long, i" wide or less, 

 flat or involute, usually erect, smooth beneath, 

 rough above ; panicle open, its branches slender, 

 spreading or ascending, rarely erect, the lower 2'-$' 

 long and often reflexed ; spikelets scattered, i-/-flow- 

 ered, ii"-3" long; empty scales unequal, the first 

 acute, i-nerved, the second obtuse or acute, 3-nerved, 

 more than half the length of the obtuse flowering 

 scales, which are i"-ii" long. 



In saline soil, southwestern Ontario to the Northwest 

 Territory, south to Kansas and Nevada. July-Aug. 

 Puccinellia Borreri (Bab.) Hitchc. is reported as growing on ballast and in waste places from 

 Delaware to Nova Scotia. It is related to P. fasciculata (Torr.) Bicknell. 



98. FESTUCA L. Sp. PI. 73. 1753. 



Mostly tufted perennial grasses, with flat or convolute leaf-blades and paniculate inflores- 

 cence. Spikelets 2-several-flowered. Two lower scales empty, more or less unequal, acute, 



