94 Proceedings of the Royal Irish Academy. 



P. lanceolata (Linn.) — Eoadsides and fields ; common. "We have in 

 the Island of Eathlin all the species of plantain which, are native 

 in Ireland : I observed the whole four growing on the same road 

 within the space of one hundred yards. 



Littorella lacnstris (Linn.) — Common on the margins of the lakes. 



Chenopomace^. 



Chenopodium album (Linn.) — Borders of cultivated fields. 



Atriplex deltoidea (Bab.) — Sea-shore west of the church ; not common. 



I take this to be the variety salina, of Babington's Manual; it 



is frequent on the coasts of Down and Antrim. 



Polygon ACE^. 



Eumex obtusifolius (Linn.) — "Waste ground ; frequent. 



R. crispus (Linn.) — Waste ground and roadsides ; common. 



R. acetosa (Linn.) — Common. 



E. acetosella (Linn.) — Common. 



Polygonum persicaria (Linn.) — Frequent. 



P. hydropiper (Linn.) — Margin of Ushet lake; not common. 



P. aviculare (Linn.) — "^^aste ground about Church Bay; not common. 



P. convolvulus (Linn.) — Fields and waste ground; frequent. 



Empeteace^. 



Empetrum nigrum (Linn.) — Rocks to the west of the lighthouse ; 

 rare. 



Etjphoebiace^. 



Euphorbia helioscopia (Linn.) — Borders of fields ; frequent. 

 E. peplus (Linn.) — IN'ear the chapel; rare. 



CeEATOPH YLL ACE^ . 



Ceratophyllum demersum (Linn.) — Ushet lake ; rare. 



Caliitkichace^. 



Callitriche verna (Linn.) — In lakes and drains. 



Ueticace^. 



Ilrtica urens (Linn.) — "Waste ground; Church Bay; rare. 

 TJ. dioica (Linn.) — Common. 



Amentieee^. 



Salix cinerea (Linn.) — By the large lake at TJshet; rare. 



S. aurita (Linn.) — "With the preceding species; rare. 



S. repens (Linn.) — Abundant over the rocky heaths. There are in 



Rathlin more forms than one of this willow, but I do not feel 



confidence in separating them. 



