210 



GRAMINEAE. 



VOL. I. 



7. Calamagrostis Macouniana Vasey. Macoun's Reed-grass. Fig. 506. 



Dcycitxia Macouniana Vasey, Coult. Bot. .Gaz. 10 : 297. 

 1885. 



Calamagrostis Macouniana Vasey, Contr. U. S. Nat. Herb. 

 3: 81. 1892. 



Culms 2-3 tall, erect, simple, smooth and glabrous. 

 Sheaths shorter than the internodes; ligule i" long; 

 blades 3' -7' long, \"-2\" wide, erect, acuminate, sca- 

 brous; panicle open, 3 '-4$' in length, the branches 

 ascending, or sometimes erect, the lower i'-ii' long, 

 naked at the base ; spikelets i" long, the outer scales 

 acute, scabrous, the first shorter than the second ; third 

 scale equalling the second, the awn a little exceeding it; 

 basal hairs about as long as the scale. 



Manitoba to Missouri, west to Washington. Summer. 



8. Calamagrostis neglecta (Ehrh.) Gaertn. Narrow Reed-grass. Fig. 507. 



Arundo neglecta Ehrh. Beitr. 6: 137. 1791. 

 Calamagrostis neglecta Gaertn. Fl. Wett. i : 94. 1 799. 

 Calamagrostis stricta Beauv. Agrost. 15. 1812. 

 C, neglecta borealis Kearney, Bull. U. S. Dept. Agr. Agrost. 

 ii : 35. 1898. 



Culms i-2i tall, erect, simple, slender, from a slender 

 rootstock. Sheaths shorter than the internodes ; ligule 

 i" long or less, truncate; blades narrow, soft, smooth, 

 sometimes involute, the basal one-third as long as the 

 culm, those of the culm 2'-$' long, erect ; panicle con- 

 tracted, 2'-4' in length, the branches i' long or less, 

 erect ; spikelets 2" long, the outer scales acute ; third 

 scale obtuse, about three-fourths as long as the second 

 and a little longer than the basal hairs ; awn attached 

 at or below the middle. 



Shores and mountains, Labrador to Alaska, south to 

 northern Maine, Wisconsin, Colorado and Oregon. Also in 

 Europe and Asia. Yellow-top, Pony-grass. Summer. 



9. Calamagrostis inexpansa A. Gray. Bog Reed-grass. Fig. 508. 



C. confinis A. Gray, Man. Ed. 2, 547. 1856. Not Nutt. 1818. 

 Calamagrostis inexpansa A. Gray ; Torr. Fl. U. S. 2 : 445. 1843. 



Culms ii-3 tall, erect, simple, smooth or rough. 

 Sheaths shorter than the internodes; ligule about i" long; 

 blades 2" wide or less, rough, flat, or involute at the apex, 

 the basal often one-half to two-thirds as long as the culm, 

 the stem leaves 2'-io' long ; panicle contracted, 2 J'-o/ in 

 length, the branches i'-2' long, erect; spikelets about 2" 

 long, the scales somewhat scabrous, the *>uter acute ; third 

 scale obtuse, the basal hairs equalling it or three-fourths 

 as long; awn more or less bent, from a little shorter to 

 slightly longer than the scale. 



In bogs, New York and New Jersey to South Dakota and 

 Colorado. Aug.-Sept. 



