104 TRIANDRIA— DIGYNIA. Aire- 



On the highland mountains, in many places, as well as on the sea 

 shore of Scotland. 



On the lofty mountains of Clova, Angusshire, and by the sea side 

 near Dundee. Mr. G. Don. Ben Lomond. Mr. David Don. 

 Ben Arthur. Professor Hooker and Mr. Boner. 



Perennial. June, July. 



Habit very much like the last, but the stems are only half as tall, 

 completely invested with the extremely long, smooth sheaths of 

 the short upper leaves, which, as well as the radical leaves, are 

 firmly involute, and pointed, so as to become awl-shaped. When 

 flattened they are found deeply furrowed on the upper side; but 

 the back, though bluntly ribbed, is very smooth to the touch. 

 Stipula oblong, bluntish] often torn. Panicle with nearly up- 

 right and close branches, much fewer and less spreading than in 

 A. caspitosa. The flowers however are larger, greener, vastly 

 less numerous ; the upper ones, at least in mountainous places, 

 generally viviparous, from the transformation of the spikelet to 

 a bud, on whose first leaves the awns still remain j see Engl. 

 Bot. The partial stalk, elevating owe floret, is very short, quite 

 smooth, not downy. Awn short, from above the middle of the 

 outer valve of each floret, and overtopping its cloven point. 



I readily concur with the ingenious Dr. Wahlenberg, in taking this 

 for the real A. alpina of Linnaeus, though the Lapland specimen 

 in his herbarium is unnamed. Of Wahlenberg's A. atropurpurea, 

 Vahl's alpina, Fl. Dan. t. 961, there is no specimen at all 5 nor 

 does Linnaeus seem to have known this species, which is very 

 different from our alpina, the panicle being more WVe flexuosa. 

 Scheuchzer's synonym, Agr. 222, cannot, without the inspection 

 of a specimen, be safely referred to either. 



5. A. flexuosa. Wavy Mountain Hair-grass. 



Panicle spreading, triple-forked, with wavy branches. Flo- 

 rets about the length of the calyx, acute. Awn from the 

 middle of the outer valve, longer than the calyx, twisted. 

 Leaves bristle-shaped. 



A. flexuosa. Linn. Sp. PI. 96. Willd.v. 1.378. Fl.Br.85. Engl. 

 Bot. v. 22. 1. 1 5 1 9. Knapp t.3\. Hook. Scot. 30. Schrad. Germ, 

 v. 1.259. Leers 23. t. 5. f.l. Host Gram. v. 2.32. t. 43. Schreb. 

 Gram. v. 2. 57. £.30. Fl. Dan. 1. 157. Ehrh. Calam. 81. 



Avena n. 1486. Hall. Hist. v. 2. 229. 



Gramen paniculatum, locustis parvis purpuro-argenteis, majus et 

 perenne. Raii Sijn. 407. 



G. avenaceum paniculatum alpinum, foliis capillaceis brevibus, lo- 

 custis purpureo-argenteis splendentibus et aristatis. Scheuchz. 

 Agr. 216. t.4.f.\b\ A, B, C. Prodr. 23. t.4. 



(3. Aira montana. Huds.35. Dicks. H. Sice. fasc. 18. 4. Leeis24. 

 L 5. f. 2 3 but not of Linnceus. 



