420 98. GEAMDTE^. 



scarcely, if at all, distinguishable; or half tlie length of the 

 upper fl. and somewhat clavate. — /3. hrevifolia (Parn.) ; radical 

 1. short, sheaths and st. smooth, panicle small. P. 106. Vivi- 

 parous states are often called^, alpina. — y. Umgiaristata (Parn.) ; 

 awns exceeding the fl., sheaths rough. P. 105. — 8. 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- 

 nower. Fl.. often viviparous. E. B. 2102. P. 23.— Meadows, 

 thickets, &c. /3, y, and 6 on mountains. P. VII. E, S. I. 



ft Awn bent, twisted at the base. 



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

 branches, 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, ligule 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. — Heathy places. P. VII. E. S. I. 



3. A. set'acea (Huds.) ; pan. spreading drooping at the end, 

 1. filiform, awn from near the base of the pale and exceeding it, 

 pedicel of second Jl, quite equalling | its length, ligule linear lan- 

 ceolate. — Sy. E. B. 1733. A. uliginosa Weihe. — St. erect, 

 slender. L. folded. Sheaths smooth. — Wet turfy bogs. P. 



VII. vni. E. s. I. 



** Lower pale bifid. Nut adnate to the pales, furrowed on the 

 back. No rudiment of a third flower. Aibopsis Fries. 



4. A. cari/ophyVlea (L.) ; pan. spreading triply forked, spike- 

 lets rounded below, awn from below the middle of the pale and 

 extending considerably beyond its attenuate deeply bifid tip. — 

 E.B.%1% P. 24. ^oerea Koch.— St. 6— 12 in. high. L. short 

 and narrow. Sheaths roughishfrom beloiv upwards. Spikelets 

 small, rounded below, chiefly collected at the ends of the 

 branches which are sometimes divaricate with seed. — ^Dry 

 gravelly places. A. V. E. S. I. 



5. A. prts'cox (L.) ; pan. spikelike oblong, spikelets scarcely 

 rounded below, awn from below the middle usually near the 

 base of the pale and extending considerably beyond its attenuate 

 deeply bifid tip.— ^. B. 1296. P. 25. Avena Koch.— Height 

 1 — 6 in. Pan. close, oval or oblong. L. very narrow. Sheaths 

 smooth. — Dry and sandy places. A. IV. V. E. S. I. 



28. Trisb'ttjm Pers. 

 1. T.flaves'cens (Beauv.) ; pan. much branched diffuse equal, 



