WELN'GAEBTNERIA. AIRA. 493 



26. WEiNGAERTNE'RiAJ3<3mA. (CorynephorusTSe&MV.ed.. viii.) 



1. W. canes' cens (Bernh.) ; pan. rather dense long, gl. exceed- 

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

 setaceous. Aira Sm., E. B. 1190. P. 110. St. tufted, slender, 

 68 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, striated lengthwise and slightly twisted; 

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

 Norf., Suff., and Jersey. [Planted near Arisaig, Invern.] P. VI. 

 VII. E. 



27. AI'RA Linn. Hair-grass. 



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

 DESCHAMPSIA Beauv. 



t Awn straight. 



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, ped. of second fl. downy or hairy. 

 K B. 1453. P. 23. Koot tufted. St. 14 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. Vivi- 

 parous states are often called A. alpina.y. longiaristata (Parn.); 

 awns exceeding the fl., sheathe rough. P. 105. d. A. alpina 

 (L.) ; pan. close, 1. mostly involute, gl. smooth on midrib, awn 

 from above the middle of the pale. Height 6 12 in. L. nar- 

 'rower. FL often viviparous. E. B. 2102. P. 23. Meadows, 

 thickets, &c, /3, y, and 5 on mountains. P. VII* E. S. I. 



ff Awn bent, twisted at the base. 



2. A.Jlexuosa (L.) ; pan. spreading triply forked with wavy 

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

 the pale and exceeding it, pedicel of the second fl. less than J 

 of its length, liyule short truncate. E. B. 1519. P. 107. St. 

 erect, slender, about a foot high. L. solid, nearly terete. 

 Upper sheaths rough from above downwards. Lower pale 

 notched at the tip. A. montana (Pluds. not L.) is a form with 

 more slender and shorter leaves. [Var. voirlichensis (Melv.) has 3 

 perfect fl. to each spikelet.] Heathy places. P. VII. E. S. I. 



