Festuca rubra near Cardiff. 275 
The latter makes its appearance about the end of May and 
has attained its maximum height about the middle of June. That 
of grandiflora is the largest of the three. Two well developed 
samples of (1) grandiflora and (2) tenuifolia, collected on June 14th, 
1914 and compared showed :— 
grandiflora. tenuifolia. 
Height - - - - 76 cm..52 cm. 
Diameter - 1-8 mm.—1*0 mm. - 1-0 mm.—0-8 mm. 
Upper §rds. naked Upper ^ naked. 
The number of cauline leaves is generally three for grandiflora, 
two to three for tenuifolia, and only two for glaucescens. The 
cauline leaf sheaths of grandiflora are as long as or slightly longer 
than the internode; they may be slightly pubescent above, or 
perfectly glabrous (Fig. 5 a). In tenuifolia the sheaths are usually, 
shorter than the internodes (Fig. 5 b), and quite smooth. In all, 
the sheath is split from top to base and the edges overlapping 
considerably. The lateral lobes of the ligule are broad and 
rounded in grandiflora, but raised into a definite pointed auricle in 
tenuifolia. The lamina is flat, somewhat involute when dry. The 
highest lamina on the haulm of grandiflora has nine longitudinal 
ridges along its upper surface ; that of tenuifolia has only five to 
seven and is shorter; that of glaucescens is very poorly developed. 
4. The Panicle. 
The panicle of subvar. grandiflora is well developed and loose, 
attaining a total length of about 18 cm. (Fig. 6 a), That of subvar. 
tenuifolia is only about half this size (6—9 cm. long) and is of quite 
different shape, especially at anthesis (Fig. 6 b). That of subvar. 
glaucescens is smaller and less well developed in every respect. 
In subvar. grandiflora the lower rhachillae are widely separated 
and long-stalked. The following numbers were obtained from 
specimens of grandiflora and tenuifolia: — 
Lengths of internodes (from below). 
grandiflora, 5-5 cm., 3 0, 2’0, and the rest 10. 
tenuifolia, 1’8 cm., F3, F0, 0 # 8, and the rest 0.6. 
Number of spikelets on branches of panicle (from below) 
grandiflora, 8 and 5, 6 and 3, the rest 2 each to terminal 1. 
tenuifolia, 4 and 2, 2 and 1, ,, ,, 1 ,, ,, ,, 1. 
The flanks of the internodes of axis and rhachillae in subvar. 
tenuifolia are lined with small, upwardly directed barbs which 
makes the axis somewhat prickly to the touch; in subvar. grandi¬ 
flora they are practically smooth. 
