POA EIGIDA. 113 



POA RIGIDA. 



HOOKER AND ARNOTT. SMITH. PARNELL. 

 GREVILLE. WILLDENOW. CURTIS. KNAPP. SCHRADER. HOST. HUDSON. 

 WITHERING. HULL. RELHAN. SIBTHORP. ABBOT. DEAKIN. 



PLATE XXXV. B. 



Schrochloa rigida, BEAUVOIS. LINK. LINDLEY. 



" " BABINGTON. 



Festuca rigida, KUNTH. KOCH. 



Glyceria rigida, SMITH. RALFS. REICHENBACH. 



The Hard Meadow- Grass. 

 Poa Grass. Rigida Rigid. 



rT^HIS diminutive British Grass grows on walls, rocks, and in barren 

 JL soil, and is therefore of no use to agriculturists. 



A frequent Grass in England, Ireland, and south of Scotland. 



Native of France, Italy, Germany, Switzerland, and Northern Africa. 



Stem near the base decumbent, otherwise upright; circular, polished, 

 and striated, having four or five linear, narrow, pointed, involute leaves, 

 with smooth striated sheaths; upper sheath shorter than its leaf, and 

 having at the apex a lengthy pointed ligule. Joints smooth, and three 

 or four in number. Inflorescence simple-panicled. Panicle upright, 

 short, lanceolate, rough, rigid, and unilateral. Spikelets linear, com- 

 pressed, mostly consisting of seven florets; the apex of basal floret 

 stretching slightly beyond the large glume of the calyx. Calyx of 

 two acute unequal-sized glumes, destitute of lateral ribs. Florets of 

 two palese; exterior one of basal floret five-ribbed, the marginal ribs 

 being broad, and having a white line down the centre; intermediate 

 ribs indistinct, dorsal rib dentate on the upper portion. Inner palea 

 somewhat shorter, and having two green marginal ribs. Length from 

 three to five inches. Root annual, fibrous, and woolly. 



Q 



