POA. 499 



8. P. ParneU'ii (Bab.) : pan. snberect large rather close, 

 oblong, spikelets ovate of 2 or 3 acute free ft., lower pale with 

 5 veins but only 3 hairy, upper sheath usually longer than its 

 leaf, upper knot at about the middle of the st. exposed, liqule 

 very short truncate. J B. S. 2916. P. 93. St. ascending, 1 ft. 

 or more high, compressed ; knots 5 or 6, uppermost not above 

 the middle of the stem. Ligule 6 times as broad as long, but 

 longer than that of P. nemoralis, to which this plant is perhaps 

 too nearly allied. Occasionally the fi. are slightly webbed. 

 High Force and other parts of Upper Teesdale. P. VII. E. 



9. P. Half our' ii (Parn.) l ; pan. erect rather spreading, spike- 

 lets ovate of 3 or 4 webbed fL, lower pale with 5 veins but only 

 3 hairy, upper sheath about as long as its leaf, upper two-thirds 

 of the stem without knots, liqule prominent blunt. P. 66. 

 E. . S. 2918. Creeping. St. '315 in. high ; knots about 3, 

 uppermost within the lower third of the stem. Lower fl. as 

 long as the larger glume. Fl. Dan. 964? Combined with 

 P. glauca by Syme. /3. P. montana (Parn.) ; spikelets few of 

 2 or 3 free fl. P. dissitiflom (R. & S.) ? Tops of mountains. 

 P. VII. E. S. 



10. P. pains' tris (L.) ; pan. large its br. rough ascending-patent 

 lower subverticillate quinate, spikelets ovate acute of 2 5-webbed fl., 

 lower pale obscurely ^-veined hairy on the keel and margins towards 

 the base, sheaths glabrous, ligule oblong-acute. Fl. Dan. 2166. 

 P. serotinaf Ehrh. , P. fertilis (Host). St. tufted ascending glabrous, 

 1. rather naTrow pointed slightly scabrid. By R. Thames, Kew and 

 Mortlake. By K. Tay below Perth, and Benniebeg Pond near Crieff. ^ 

 K. Boyne below Navan. Probably introduced. P. VI. VII. E. S. I. 



ttt Lower pan.-branches subverticillate, quinate. Dorsal vein 

 of the lower pale hairy or glabrous ; marginal glabrous. 



11. P. trimdlis (L.) ; pan. diffuse, spikelets ovate of 2 or 3 

 acute webbed fl., lower pale with 5 veins, dorsal vein hairy, 

 upper sheath much longer than its leaf, liqule acute long. 

 E. B. 1072. P. 35. Root tufted. St. 1 2 ft. high. Sheaths 

 usually slightly rough [or var. glabra (Doell.) smooth]. j8. parvi- 

 Jiora (Parn.); spikelets small 1 2-fl owered, plant slender. 

 Moist and shady places. P. VI. E. S. I. 



*P. Cliaixii (Gilib.) ; pan. diffuse, spikelets oval of 3 or rarely 

 5 acute not webbed fl., lower pale with 5 glabrous veins, upper 

 sheath very much longer than its leaf, ligule blunt very short. 



1 Prof. Hackel writes "probably no clear line can be drawn between 

 P. Balfourii [as here constituted] and the alpine forms of P. nemoralis" 

 See J. ofB. xxxv. (1897) p. 71 H. & J, G. 



