80 4'i. Triohophor. 9. CYPERACE.E. Pl.end.ph, 



slender, leafy at bottom ; leaves short, linear, obtuse, chan- 

 nelled; sheaths tubular; scales many; spike terminal, single, 

 hermaphrodite or unisexual ; bractecs, 2, unequal, glu- 

 maceous. 



Trkhophorum olpinum. Alpine hares-tail. 



Culm 3 or 4* angular, angles rough ; IractecB shorter than 

 the spike; spike fevi-^owered. 



Lina^rostis § 1 , No. 3, Micheli N. P. G. 54. 

 Eriophorum alpiniim, Lin. S. P. 77. 

 Trichopliorura alpinuni, Persoon Sj/7t. 1,70. 



Turf bogs; perennial; April, May. 



Culms erect, 9 in. high ; leaves I in. long, blunt; spike 

 ovate; bractece ovate; upper bractea mucronate; mucro 

 short, blunt ; lower bractea awnless. 



XIII. 44. ERIOPHORUM. Theophrastus. Cotiongrass. 

 Spathelle 1, imbricate, all fertile; glum,elles bristly, 

 bristles many, smooth, woollike, longer than the glumes, 

 becoming exserted; stamens S; style 1, not dilated at bot- 

 tom, jointed, falling off; stigmata 2 or 3 ; akenium 3-sided, 

 ovate. — Root creeping, mostly in tufts, perennial; culms 

 round or angular, mostly smooth ; spike manyflowered, 

 hermaphrodite; glu7nes scarcely ribbed, very thin, scariose, 

 dark, edge white. 



a. Spikes single^ terminal ; bractecRS or 4, like the glumes^ 



1. Eriophorum capitatum. Headed cottongrass. 

 Culm round ; sheaths slightly inflated : spike sub- 

 globose; anther heartshape, ovate, short; root creeping. 



Linagrostis ^ 1 , No. 2, Micheli N. P. G. 54. 

 Eriophorum capitalum, Hoff. Germ. 3, 26. 

 Erioplioiuin Scheuchzeri, Persoon Syn. 1,70. 

 Eriophorum vagitiatum jS, Suter Fl. Helv. 1,28. 

 Eriophorum alpioum, ViUars Dauph. 2, 184. 



Marshy heaths; perennial; March. 



Root long; culms few, thick, soft, deep green, sheathed 

 below; leaves in bundles, bristleiike, awlshape, spongy, 

 shorter than the culms. 



2. Eriophorum vaginatum. Sheathed cottongrass. 

 Culms 3-sided; sheaths inflated above, bellied; spike 



oblong, ovate ; anthers linear, long ; root fibrous, in tufts. 



