Jones: Flora of Illinois, 22. Gramineae 51 



6. Lemmas awned, much longer than broad. 



7. First glume 3-nerved; second glume 5-7-nerved; lemmas broad, obtuse. 

 8. Panicle open, the branches ascending or drooping. 



9. Sheaths glabrous; awns shorter than the lemmas; fields and waste 



places; introd. from Eur. May-July. Cheat B. secalinus L. 



9. Sheaths retrosely pilose. 



10. Awns straight, 7-9 mm. long; fields and waste places; adv. 



from Eur. May-July B. commutatus Schrad. 



10. Awns flexuose, divergent at maturity, 9-12 mm. long; waste 



places; adv. from Eur. May-July B. japonicus Thunb. 



8. Panicle small, dense, erect or nearly so, 5-10 cm. long; sheaths 

 pubescent. 

 1 1 . Lemmas glabrous, 7 mm. long; roadsides and waste places; adv. 



from Eur. June-Aug B. racemosus L. 



11. Lemmas pubescent, 9-10 mm. long; roadsides, waste places, and 

 fields, common; adv. from Eur. May-July. [5. hordeaceus 



sensu auth., non L.} B. mollis L. 



7. First glume 1 -nerved; second glume 3-nerved; sheaths pubescent; awns 

 longer than the acuminate lemmas. 

 12. Awns 10-17 mm. long; lemmas pubescent; panicle dense; roadsides 



and fields; adv. from Eur. May-July B. tectorum L. 



12. Awns 2-3 cm. long; lemmas scabrous; panicle loose; waste places; 



adv. from Eur. May-July. [5. villosiis Forsk., not Scop.} 



B. sterilis L. 



3. Festuca L. — Fescue Grass 



1. Lemmas awnless or merely mucronate; leaves flat, 3-7 mm. wide. 

 2. Panicle narrow, erect; lemma 5-7 mm. long; meadows, roadsides, and 

 waste places; nat. from Eur. June-July. Meadow Fescue ...F. elatior L. 

 2. Panicle open; lemmas 4-5 mm. long. 



3. Panicle-branches elongate, slender, spreading, spikelet-bearing toward 

 the ends or above the middle; woods, local. May-July. Nodding 



Fescue. [F. nutans Spreng., not Moench} F. obtusa Spreng. 



3. Panicle more compact, the few shorter branches spikelet-bearing from 

 near the middle, the spikelets somewhat aggregate; woods, rather rare. 



June. [F. shortti Kunth] F. paradoxa Desv. 



1. Awn of lemma 1-7 mm. long; leaves involute, not more than 1 mm. wide. 

 4. Perennial, tufted; spikelets 4-5-f lowered; stamens 3; fields and waste places; 



nat. from Eur. May-June. Sheep Fescue F. ovina L. 



4. Annual, not tufted; spikelets 5-13-flowered; stamen 1; sandy soil. May- 

 June. Slender Fescue, [f . tenella Willd.J F. octoflora Walt. 



4. Glyceria R. Br. — Manna Grass 

 {Panicularia Heist.) 



1. Spikelets linear, nearly terete, 1-2 cm. long; panicles narrow, erect. 



2. Spikelets 1-1.5 cm. long, distinctly pedicelled; in shallow water, or at the 



edges of streams or ponds, n. half, of 111., not common 



G. borealis (Nash) Batch. 



