62 Gramineae. 



634 Panicle somewhat one-sided, spikelets 

 crowded at the ends of the long naked 

 branches, Dactylis XXVI. 



634 Panicle spike-like, .... Koeleria XXVII. 



635 One or both empty glumes 5 or more nerved, . . Melica XXVIII. 

 635 Empty glumes never more than 3-nerved, 636 



636 Outer palea 2-nerved, ..... Molinia XXIX. 



636 Outer palea with 3 — 7 parallel nerves, 637 

 637 Glumes convex, tip acute or obtuse, 638 

 637 Glumes compressed keeled, Poa XXX. 



638 Tip of flowering glumes torn, . . Catabrosa XXXI. 



638 Tip of flowering glumes entire, . . Glyceria XXXII. 



l.—ANTHOXANTHUM. 



ANTHOXAN'THUM ODORA'TUM (no). Sweet-scented Vernal 

 (1639) Grass. 6 — 7. Stem i — 2 ft. high, panicle yellow spiked compact 

 oblong, each spikelet with 2 neuter awned florets and one perfect floret 

 without an awn, stamens 2, lodicules o, anthers large. Meadows. 



ll.—NARDUS. 



NAR'DUS STRIC'TA (107). Mat-Grass. 6—7. Stem 2—8 in. erect 

 (1755) slender rigid, spikelets \ — f in. sessile in two rows forming a one- 

 sided spike I — 3 in. long, empty glumes o, lodicules o, style i. Moors 

 and heaths. 



III.— FA NIC UM. 



PANICUM CRUS-GAL'LI. Loose Panic Grass. 7—8. Stems 1—4 ft. 



(1628) stout, leaves ^ in. diameter flat glabrous tinged with purple rough at 

 the edges, spike interrupted, branches alternate or opposite, exterior 

 palea with an awn or bristle. Fields and waste places in the south- 

 east of England. 



IV.—HORDEUM. 



Spikelets one-flowered in threes sessile forming a spike, one of the three 

 only usually perfect, exterior palea ending in a long awn, fruit adherent to the 

 palea. 



Florets of central spikelets staminate, of lateral spikelets 



perfect, ......... H. sylvaticum. 



Florets of lateral spikelets imperfect, of central spikelets 

 perfect, 639 



639 Glumes all setaceous rough, . . . . H. pratense. 

 639 Glumes of middle floret linear lanceolate ciliate. H. murinum. 



