5. Calamagrostis Langsdorfii (Link) Trin. Langsdorf's Reed Bent-Grass

Fig. 504

Arundo Langsdorfii Link. Enum. 1: 74. 1821.

C. Langsdorfii Trin. Unifl. 225. pl. 4. f. 10. 1824.

Culms 2°- 4° tall, erect, simple, smooth or roughish. Sheaths shorter than the internodes; ligule l"-3" long; blades 4'-12' long, 2"-4" wide, scabrous; panicle 2'-6' in length, the branches ascending or sometimes erect, the lower 1'-2' long, naked at the base; spikelets 2"-3" long, the outer scales acuminate, strongly scabrous; third scale equalling or shorter than the second, scabrous, the stout awn as long as or a little exceeding the copious basal hairs which are usually somewhat shorter than the scale.

In meadows and on rocks, Greenland to Alaska, south in the mountains to North Carolina, Michigan, New Mexico and California. Also in northern Europe and Asia. Purple-top. Northern blue-joint. Summer.

6. Calamagrostis Canadensis (Michx.) Beauv. Blue-Joint Grass

Fig. 505

Arundo canadensis Michx. Fl. Bor. Am. 1: 73. 1803. Calamagrostis canadensis Beauv. Agrost. 15. 1812. C. canadensis acuminata Vasey, Bull. U. S. Dep. Agr. Agrost. 5: 26. 1897.

Culms 2°-5° tall, erect, simple, smooth or somewhat scabrous. Sheaths shorter than the internodes; ligule 1"-3" long; blades 6'-1° long or more, 1"-4" wide, rough; panicle 4-7' in length, open, usually purplish, the branches spreading or ascending, the lower 1 1/2'-3' long, naked at the base; spikelets 1 1/2"-2" long, the outer scales equal or subequal, acute, strongly scabrous; third scale equalling or slightly shorter than the second, scabrous, the awn delicate and equalling the copious basal hairs which are about as long as the scale or some of them shorter.

In swamps and wet soil, Newfoundland to British Columbia, south to North Carolina, New Mexico and California. Ascends to 5000 ft. in the Adirondacks. Blue-stem. July-Sept.

6 Calamagrostis Canadensis Michx Beauv Blue Joint  505

7. Calamagrostis Macouniana Vasey. Macoun's Reed-Grass

Fig. 506

Deyeuxia 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 1" long; blades 3'-7' long, 1"-2 1/2" wide, erect, acuminate, scabrous; panicle open, 3'-4 1/2' in length, the branches ascending, or sometimes erect, the lower i'-i 1/2' long, naked at the base; spikelets 1" 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.

7 Calamagrostis Macouniana Vasey Macoun s Reed Gra 506

8. Calamagrostis Neglecta (Ehrh.) Gaertn. Narrow Reed-Grass

Fig. 507

Arundo neglecta Ehrh. Beitr. 6: 137. 1791-Calamagrostis neglecta Gaertn. Fl. Wett. 1: 94. 1799. Calamagrostis stricta Beauv. Agrost. 15. 1812. C. neglecta borealis Kearney, Bull. U. S. Dept. Agr. Agrost. 11: 35. 1898.

Culms 1°-2 1/2° tall, erect, simple, slender, from a slender rodtstock. Sheaths shorter than the internodes; ligule 1/2" long or less, truncate; blades narrow, soft, smooth, sometimes involute, the basal one-third as long as the culm, those of the culm 2'-5' long, erect; panicle contracted, 2 1/2'- 4' in length, the branches 1' 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.

8 Calamagrostis Neglecta Ehrh Gaertn Narrow Reed G 507