GENUS 45. 



GRASS FAMILY. 



211 



10. Calamagrostis labradorica Kearney. Lab- 

 rador Reed-grass. Fig. 509. 



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

 ii : 38. if 





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

 brous; ligule f"-i*" long; blades up to 8' long, ri" 

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

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

 long, less than 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. 



\ 



ii. Calamagrostis hyperborea Lange. North- 

 ern Reed-grass. Fig. 510. 



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



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



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



Agrost. ii : 40. 1898. 

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



Agrost. ii : 41. 1898. 



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, 4-12' long, 2.V 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. Gram. 187. 1817. 



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



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



Culms 3-5 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'-! long or more, 2"-$" wide, attenuate into a long 

 point, scabrous, occasionally sparingly hirsute; panicle 

 3'~7' in length, contracted, the branches erect, the lower 

 I '-2' 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. 



