. 
62 - TRIANDRIA. DIGYNTAs ie 
_ Florets without a third rudiment between 
ers scariose and shining, disposed in capillaty pa- 
‘$. In many species the vaives of the calix or the 
corolla are obtuse. From Avena the awned species are 
distinguished by producing straight or geniculate awns, 
arising from the base of the flower. 
Species. 1 pumila? 2. aquatica, (this species-is nearly 
allied to Poa.) 3. obiusuta 4 brevifolia? 5 capillacea. 6 
precox. 7. flexuosa. 8. cespitosa. 9. mollis. 
This genus is almost exclusively confined to Europe ~~ 
and North America; some species, however, are common 
_ to Barbary, and the South of Europe. eae ee 
. *URALEPSIS.+ a. 
es. 
 Calizx scariose, 2-valved, 2 or 3-flowered, | 
“somewhat terete, much shorter than the outer 
valve of the corolla, acute at the base. Flowers 
alternate, distinct. Corolla 2-valved, stipitate, 
Valves very unequal, the outer tricuspidate, cen- 
tral cusp much longer, terminated by a straight 
_ awn, nerves all pubescent; inner glume short, 
_ . arched inwards. Seed somewhat gibbous, en- 
 larged above, arillate. 
Grasses with the habit of Andropogon, and partly the 
~ Structure of Aira. Culm simple, leaves and gheathes 
~ short; racemes few-flowered, remote, nearl, simple, and 
<?.~-golitary, axillary and terminal, sheathed; sheathes deci- 
duous; (flowers and culm purple ) ; * 
Species 1. U purpurea. (Aira purpurea, WautER and 
Evviort.) Culm tereie and somewhat hairy below the 
commencement of flowers, semicy lindric ubove; racemes 
shorter. than the internodes _ few-flowered, flowers nearly 
Leaves flat, very narrow, above almost filiform. 
wered, vaives nearly equal in length, each 
‘s somewhat acute, rarely lacerate. Uo- 
=. WO BR AWR-AS I 88 hes 
tended to indicate the si 
