MONOCOTYLEDONS. GRAMINEiE. FeStUCd. 169 



20. DACTYLIS. 



Glume 2-valved, many-flowered ; valves unequal, the larger one 

 keeled. Perianth 2-valved ; valves lanceolate, awnless. Ca- 

 ryopsis invested with the permanent, hardened perianth. 



1. D. glomerata, panicle crowded secund, leaves plane, p. 37. 

 — Way -sides, ^c. 



21. ELYMUS. 



Glumes many-flowered, in pairs or ternate, lateral, the valves 

 nearly equal. Perianth firmly enveloping the caryopsis ; valves 

 lanceolate, ext. acuminate or lengthened into an awn. {Fl. 

 spiked.) 



1. E. arenarius, spike upright dense, spikelets pubescent, flowers 

 awnless as long as the glume, leaves involute rigid, p. 46. — 

 Sandy sea-shores. 



22. FESTUCA. 



Glume 2-valved, many-flowered ; valves unequal. Perianth of 2 

 valves, lanceolate, ext. one acuminate or awned at the extre- 

 mity. 



1. F. ovina, panicle subsecund subcoarctate, spikelets oblong of 

 about 4 — 5 flowers with short awns, culms square (upward), 

 leaves setaceous, p. 38. — Dry pastures. 



2. F. duriusaila, panicle subsecund subcoarctate, spikelets ob- 

 long of about 6 flowers with short awns, stem leaves nearly 

 plane, radical ones subsetaceous. p. 38. — Dry pasttires, espe- 

 cially near the sea. 



3. F. bromoides, panicle secund racemose, flowers shorter than 

 the awn monandrous, culm above leafless, p. 39. — IValls. 



A. F. Myurus, panicle secund elongate contracted, flowers shorter 

 than the awn monandrous, culm leafy in its upper part. p. 39. 

 —Walls, ^c. 



5. F. giguntea, panicle branched drooping towards one side, 

 spikelets lanceolate compressed, flowers shorter than the awn, 

 leaves linear-lanceolate ribbed, p. 39. — Moist woods. 



6, F. calamaria, panicle subsecund much branched spreading 

 nearly erect, spikelets oblong awnless 3 — 5 -flowered, leaves 

 linear-lanceolate, p. 40. — Aloist alpine ivoods. 



1 . Y . foliacea, raceme spiked distichous elongate, spikelets di- 

 stant linear many-flowered, florets cylindrical awnless. p. 40, 

 —Pastures. 



8. F. pratensis, panicle patent branched, spikelets linear many- 

 flowered, florets cylindrical awnless, leaves linear, root fibrous, 

 p. 40. — Meadows. 



9. F. elatior, panicle patent very much branched, spikelets o\a- 

 to-lanceolate many- flowered, florets cylindrical subaristate, 



