Plend.ph. 10. GRAMINEiE. 75. Arrhenath. 133 



Gramen aveTiaceum q. Gramen jiodosum avenacea panicula C. Baubin, 

 Tiaii Syn. 406, 4. 



Gramen caninum nodosum, Ger. em. 23. 



Gramen caninum nodosum bulbosum vulgare, Park. 1175. 



Avena nodosa, Cullum, 41. 



Avena elatior |S, Schreb. Gram. 



Avena precatoria, T'huill. Fl. Par. 



Fields ; perennial ; June and July. 



LacustcB smaller than in the former species. 



XXXV. 16. CATABROSIA. Beauvois. Siveetgrass, 



Glumes 2 to 5-flowered ; spathelles parallel, shorter than 

 the flowrets, rather truncated, torn-edged, toothed ; glu- 

 Tuelles awnless; lower spathellide rather truncate; torn- 

 edged, toothed; upper slightly S-cut; lodicule lanceolate; 

 ovary slightly nicked; stigmata featherlike, rather aspergil- 

 liform ; cariopsis 2-horned. — Panicle compound. 



Caiabrosia aquatica. Water sweetgrass. 



Panicle loose, spreading; peduncles rather verticillate ; 

 locustce 1 or 2-flowered ; lower spathelhile furrowed, plaited, 

 smooth; leaves flat, smooth. 



Gramen miliaceum aquaticum, Rati Syn. 402, 3, 



Aira aquatica, Lin. S. P. 93. 



Poa dulcis, Salisb. Prod. 26. 



Poa airoides, lioel. Gram. 194. 



Watery places ; perennial ; May, June. 



Root creeping ; cidm floating, extended ; branches ascend- 

 ing ; leaves floating, broad ; ligula not notched, white ; 

 panicle upright; locustcB small, close together, coloured. 



/3. unijlwa. Locustce 1 -flowered ; floivret sessile. 



XXXVI. 77. AIRA. Theophrastus. Hairgrass. 

 Glumes scariose, 2-flowered ; spathelles alternate, nearly 



equal, longer than the flowrets; glumelles awned; lower 

 spathelhile torn or toothed at the tip, awned below the 

 middle; awn coriaceous, plaited, twisted; upper 2-cut 

 toothed; lodicule ovate, not nicked, bald ; stigmata y'A\o&ci 

 cariopsis free. — Panicle branched ; leaves bristlelike. 



a. S^pathelles 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 obtuse,^ 



7 



