CORYNEPHORUS. AIRA. 397 



26. CORYNEPHORUS Pal. de Beauv. 



1. C. canescens (Beauv.) ; pan. rather dense long, gl. exceed- 

 ing the fl. acuminate, awn from near the base of the pale, 1. seta- 

 ceous. Aira Sm., E. B. 1190. P. 1 10. St. tufted, slender, 

 6 8 in. high. L. many. Pan. close, spreading with flowers; 

 branches short. Spikelets variegated with purple and white. 

 Anth. dark purple. Lower portion of the awn dark yellow, 

 straight, cylindrical, longitudinally striated and slightly twisted ; 

 upper part clavate, white tinged with purple. Sandy coasts of 

 Norf., Suff., and Jersey. P. VI. VII. E. 



27. AIRA Linn. Hair-grass. 



* Lower pale truncate, jagged. Nut free, not furrowed on the back. 

 f Awn straight. DESCHAMPSIA Beauv. 



1. A. c&spitosa (L.); pan. spreading, 1. flat, gl. slightly rough 

 at the midrib, awn from below the middle of the pale and scarcely 

 extending beyond its tip. E. B. 1453. P. 23. Root tufted. 

 St. 1 4 feet high. L. rigid, roughish ; their margins involute 

 when dry. Pan. -branches rough. Lower pale with 4 veins in 

 addition to that which ends in the rough awn. Rudiment of 

 third fl. often scarcely, if at all, distinguishable ; or, half the 

 length of the upper fl. and somewhat clavate. /3. brevifolia 

 (Parn.); radical 1. short, sheaths and st. smooth, panicle small. 

 P. 106. Viviparous states are often called A. alpina; they 

 produce stoles and sometimes have the awn from the upper part 

 of the pale. y. longiaristata (Parn.) ; awns exceeding the fl., 

 sheaths rough. P. 105. Meadows, thickets, &c. j3. and y. 

 Mountains. P. VII. 



ft Awn bent, twisted at the base. 



2. A. alpina (L.) ; pan. close, 1. mostly involute, gl. smooth 

 on midrib, awn from above the middle of the pale and scarcely 

 extending beyond its tip. E. B. 2102. P. 23. Height 6 12 

 in. L. narrow, rigid, roughish on the upper surface. Pan.- 

 branches quite or nearly smooth ; lower lax ; upper erect. Fl. 

 often viviparous. Tops of Highland mountains. P. VIII. S. 



3. A. flexuosa (L.) ; pan. spreading triply forked with wavy 

 branches, 1. very narrow subsetaceous, awn from near the base of 

 the pale and extending considerably beyond its tip, pedicel of the 

 second fl. less than i of its length, ligule truncate. E. B. 1519. 

 P. 10/. St. erect, slender, about a foot high. L. solid, nearly 

 terete. Upper sheaths rough from above downwards. Lower 



pale notched at the tip. Heathy places. P. VII. 



*fc 



