74 Bulletin VII. 1. 



There is a woodland form of this species which is smaller 

 throughout. Culms about two feet, panicle four to six inches 

 long, empty glumes with white scabrous margins and tips. In 

 open, rocky woods where the soil is apparently dry. Sometimes 

 mistaken for C. pendula. Dr. Gattinger noted this form on Para- 

 dise Ridge. 



This grass is very leafy and has strong perennial rhizomes, and 

 it may have some value as a native hay in wet, rich lands along 

 streams. Its cultivation cannot at present be recommended. 



2. Cinna peniula Trin. Slender Reed-grass. 

 Plate XXIV. Figure 95. 



Culms rather slender, two to three feet high, leaves and sheaths 

 much as in C. arundinacea, but the blades rather more scabrous 

 on the nerves. Panicle lax, often few-flowered, the branches capil- 

 lary and more or less drooping. The glumes less firm than in C. 

 aru-ndinacea and the empty glumes nearly equal, otherwise the 

 same. 



Found upon Roane Mountain and doubtless occurs in the cold 

 mountain woods of the upper and eastern part of the State. July — 

 August. Of no agricultural value. 



26. AGROSTIS Linn. Sp. PI. 6 (1753). 



Spikelets one flowered, in open panicles, rachilla articulated 

 above the empty glumes, not produced beyond the flower. Empty 

 glumes two, equal or nearly so, acute, longer than the floret. 

 Flowering glume rather broad, less firm in texture than the outer 

 glumes, usually obtuse, awnless, or with a slender dorsal awn. 

 Palea hyaline, much shorter than the floral glume or wholly absent. 

 Stamens three, grain enclosed by the floral glume but free from it. 



Annual or usually perennial grasses, with small spikelets in 

 open, usually diffuse, panicles. 



Species about ico, distributed over the entire world, especially 

 in the north temperate zone. In the United States the species 

 are most numerous in the far Northwest. Of the seven species 

 found within the state, six are natives. 



KEY TO THE SPECIES. 



I. Palea half the length of the flowering glume . 9. A. alba. 



(a) Ligule 2 to 5 lines long var. a. alba. 



(b) Ligule shorter, truncate .... 



(i) Culms erect var. b vulgaris. 



(2) Culms prostrate and rooting at the lower joints, 



flowering branches ascending 



var. C. STOLONIFERA. 



1. Palea very minute or none 2 



2. Flowering glumes awned 3 



2. Flowering glumes awnless or rarely short awned (awn not 



constant) 5 



f 



