Genus 45. 



GRASS FAMILY. 



10. Calamagrostis labradorica Kearney. Lab- 

 rador Reed-grass. Fig. 509. 



C. labradorica Kearney, Bull. U. S. Dep. Agr. Agrost. 

 11 : 38. 1898. 



Culms i°-2° tall, rather stout; leaf-sheaths gla- 

 brous; ligule \"-\\" long; blades up to 8' long, \\" 

 wide or less, very involute, filiform toward the apex, 

 erect, glabrous on the lower surface; panicle 2-4' 

 long, less than i' wide, linear to oblong-lanceolate, 

 much interrupted below, strict, its stout branches 

 short and appressed; spikelets about 2" long, the 

 empty scales ovate to ovate-lanceolate, acute, firm, 

 purple or purplish, the flowering scale broad, rough 

 on the back, the awn attached at or below the 

 middle, slender, erect, straight. 



Rocks on the seashore, Labrador. July. 



11. Calamagrostis hyperborea Lange. North- 

 ern Reed-grass. Fig. 510. 



C. hyperborea Lang, Fl. Dan. 50: pi. 3. 1880. 



C. robusta Vasey, Contr. U. S. Nat. Herb. 3 : 82. 1892. 



C. hyperborea elongata Kearney, Bull. U. S. Dep. Agr. 



Agrost. 11 : 40. 1898. 

 C. hyperborea americana Kearney, Bull. U. S. Dep. Agr. 



Agrost. 11 : 41. 1898. 1 



Culms ii°-3° tall, rigid, densely tufted; leaf- 

 sheaths smooth and glabrous; blades rough on both 

 surfaces, flat, or often involute toward the apex, 

 stiff, 4'-i2' long, 2i" or less wide ; panicle contracted, 

 3'-6' long, its short branches erect or ascending; 

 spikelets ii"-2" long, the empty scales scabrous, 

 acute, the flowering scale with the callus-hairs from 

 a little shorter than to nearly equalling it, the awn 

 about equalling the scale. 



Meadows and swamps, Greenland to Alaska, south to 

 Pennsylvania, Colorado and California. Very variable. 

 June-Aug. 



12. Calamagrostis cinnoides (Muhl.) Scribn. 

 Nuttall's Reed-grass. Fig. 511. 



Arundo cinnoides Muhl. Grarri. 187. 1817. 



C Nuttalliana Steud. Syn. PI. Gram. 190. 1855. 



C. cinnoides Scribn. Mem. Torr. Club, 5: 42. 1895. 



Culms 3°-S° tall, erect, simple, smooth and glabrous. 

 Sheaths shorter than the internodes, smooth or rough, 

 the lower sometimes sparingly hirsute, and rarely with a 

 villous ring at the summit; ligule i"-2" long; blades 

 4'-i° long or more, 2"-$" wide, attenuate into a long 

 point, scabrous, occasionally sparingly hirsute; panicle 

 3'-/ in length, contracted, the branches erect, the lower 

 i'-a' long; spikelets 3"-4" long; scales strongly scabrous, 

 the outer about equal, acuminate and awn-pointed ; third 

 scale shorter, obtuse, the basal hairs one-half to two- 

 thirds its length; awn stout, exceeding or equalling the 

 scale; prolongation of the rachilla bearing a terminal 

 tuft of hairs. 



In moist soil, Maine to Ohio, south to Georgia and Alabama. Ascends to 2000 ft. in Penn- 

 sylvania. Reed Bent-grass. Wild Oats. July- Aug. 



