Polygonum.} POLYGONACE^. 309 



From 1310 to 1500 ft. in Donegal {Eart); 500-1200 ft. in 

 SHgo {£. Sf r.) ; to 2380 ft. in Kerry {Rart). 



First found ia Ireland by Edmund Murphy, on Ben Bulben, in 

 1826. 



12. f P. saggitifolium Linn. — Arrow-leaned Tea/r-tMmb. 



Districts I. — — — — — — — — — — — 



Boggy ground and moist places ; very rare. Fl. July-August. 

 I. Abundant in tbe stony bed of a small stream at Castle Cove, 

 east of Derrynane, Kerry, 1889 (as P. arifolium Linn): R.W. S. 

 i8go. In a boggy hoUow a mile nortb of, and inland from, the 

 preceding station, 1892; R.W. 8. Very abundant over an area of 

 more than 12 acres close to tbe latter station, quite fiUing tbe 

 ditches, bog-drains, &c., 1894; P.W. S. and E. Synnott. Still 

 abundant but not spreading, 1896 ; R. W. S. 



An annual, strongly prickly species of slender growth, common 

 in low grounds in the northern United States. The proper standing 

 of this plant in the Irish flora is most difficult to determine. 

 "While its hard seeds would no doubt lend themselves rather readily 

 to introduction with ballast or grain, the Kerry locality is remote 

 from any of the stations usually affected by aliens, such as harbours, 

 towns, or railway Unes. The plant, moreover, is without any 

 beauty or utility which might suggest its intentional introduction. 

 Tet, with our present knowledge of its distribution in Ireland, it 

 cannot be accepted as native, and it seems best to regard it as an 

 alien introduced by some accidental means and now fully established 

 in a wild locality. 



OXTEIA Hill. 



1. 0. digyna HiU — Mountain Sorrel. 



0. reniformis Hook. 



Districts I. II. — — — VIII. IX. — XI. — 



Lat. 52°-55°. From South to l^orth. Type, Highland. 



"Wet mountain cliffs ; rare. JE'l. July-August. 



I. On the chfEs upon the highest of the MagQlicuddy's Eeeks, 

 and Brandon mountain, Kerry, 1804-6 : Mach. Ra/r. In most of 

 the upper gullies of CarrantuohU. : Hart 1882. Abundant on 

 Brandon mountain, 1885 ; iV. C. Connor Hill near Dingle {Moore) ; 

 on Mangerton {Carroll) : Cyl. Coomasaham mountains near 



