124 v ArRA, (ad Tab, XVIII, ) 
ma calycina unifllora, bivalvis; valvulis oblongis, 
membranaceis, albis, dorso, spadiceis, subaequali- 
bus, muticis, totis lana eadem qua paniculae pedun- 
cüli et pedicelli obsitis. Gluma corollacea unival- 
vis, valvula minima, albo- mermbranacea, submu- 
tica, aut dorso aristata, gluma calycina involuta. 
Antherae flavae, admodum fugaces. Stigmata pur- 
purea, plumosa, | | ——. 
Add .. Flor. Praer, — Mess. 
me "Jun. — Jul. 
Habit. ad ripas rivulor. Gall. in Depart. du 
Var. de Bouches du Rhóne, Basses Alpes, de la 
Vaucluse etc. — — — iem 
TAM HECIIC NUR M i 
XVIL Aira. Canche. Schmiele, (Gra- 
"^N mens'Pourni)'. 
. Linn. ed. Gil. 2. 22. Venten.2.104. Lam. t.44. 
Flor. dan. t, 157. Giürtn. 1. 4. t. I. £, 7. Moench. 
ro 9 1 0 UC oap hp Eo gen wm 
^  Gluma calycina biflora, raro pluriflora, aut uni- 
flora, bivalvis, valvulis plerumque membranaceis, 
ovato lanceolatis ; acutis aut [ERR plus minusve 
nitentibus, inaequalibus aut fere aequalibus. |. G/a- 
mae corollaceae bivalves , valiulis calycinis simili- 
bus; exteriorearistatá (ráro mutica). dr ista certe 
ex basi, aut prope basin, nec manifeste ex dorso, 
&ec ex apice ptoveniens,. — Filamenta tria capillaria, 
longitudine glumae corollaceae;  Zmihefae oblon- 
ie; utrinque furcatae, Ooárium ovatum. Styli 
uo setacei, patentes. $t:emata pubescentia. Gluma 
corollacea. semini 'adnascitur. ,.,Semen subovatum 
tectum Mile sulcabum. , e 
" Panicula laxa aut contracta. (Differt ab Avena, 
ex r* 
praecipue à speciebus bifloris , Arista ex basi, nec 
