Pl.end.ph. 10. GRAMINEAL 75. Arrhenath. 133 
Gramen averiaceum q. Gramen nodosum avenacea panicula C. Bauhin, 
Raii Syn. 406, 4. 
Gramen caninum nodosum, Ger . cm. 23. 
Gramen caninum nodosum bulbosum vulgare, Park. 1175. 
Avena nodosa, Cullum , 41. 
Avena elatior jS, Schreb. Gram. 
Avena precatoria, Thuill. FI. Par. 
Fields; perennial; June and July. 
Locustce smaller than in the former species. 
XXXV. 76. CATABROSIA. Beauvois. Sweetgrass . 
Glumes 2 to 5-flowered ; spathelles parallel, shorter than 
the flowrets, rather truncated, torn-edged, toothed ; glu- 
melles awnless; lower spathellule rather truncate; torn- 
edged, toothed; tipper slightly 3-cut; lodicule lanceolate; 
ovary slightly nicked; stigmata featherlike, rather aspergil- 
liform ; cariopsis 2-horned. — Panicle compound. 
Caiahrosia aqualica. Water sweetgrass , 
Panicle loose, spreading; peduncles rather verticillate ; 
locust ce 1 or 2-flowered ; lower spathellule furrowed, plaited* 
smooth ; leaves flat, smooth, 
Gramen miliaceum aquaticum, Rail Syn. 402, 3 . 
Aira aquatica, Lin. S. P. 95. 
Poa dujcis, Salisb. Prod. 26. 
Poa airoides, Koel. Gram. 194. 
Watery places; perennial; May, June. 
Root creeping ; culm floating, extended ; branches ascend- 
ing; leaves floating, broad; ligula not notched, white; 
panicle upright ; locustce small, close together, coloured. 
p. uniflora. Locustce 1 -flowered ; Jlowret sessile, 
XXXVI. 77. AIRA. Theophrastus. Hairgrass . 
Glumes scariose, 2-flowered; spathelles alternate, nearly 
equal, longer than the flowrets; glumelles awned; lower 
spathellule torn or toothed at the tip, awned below the 
middle; awn coriaceous, plaited, twisted; upper 2-cut 
toothed ; lodicule ovate, not nicked, bald ; stigmata villose ; 
cariopsis free. — Panicle branched ; leaves bristlelike. 
a. Srpathelles equal ; glumelles awned above the base ; 
flowrets nearly sessile ; plant annual . Canchium. 
1 . Aira prcecox. Early hairgrass. 
Panicle contracted, spikeshape; base of the spathelles 
naked; awn twice the length of the glumes; ligulce obtuseo 
