ON THE FLORA OF NORTH-WESTERN DONEGAL. 143 



destitute of leaves is described in Hemsley's ' Diagnoses Plantarnm 

 novarum Mexicanarum ' under the name " 1\ microphylla, A. W. 

 Bennet." This was a misprint for P. microptera ; but, under what- 

 ever name, the sj)ecies must be sunk in Linnaeus' s. It inchides 

 the following Mexican localities: — Lindh., 74; Liebm., 16-18; 

 Xalapa, Gal., 7096; Oaxaca, Herb. Vind., 212. 



The other North American s^Decies of this section are P. lepto- 

 caidis, T. & Gr., from Texas, P. setacea, Mx., and P. Chapmaniii, 

 T. & Gr. (doubtfuUy), of the Southern United States. 



Two Cuban species, P. hrachyptera, Gris., and P. sqiia mi folia, 

 Wr., certainly belong to this section ; as also does 



11. P. stenophylla, A. Gr., in Bot. Wilkes' Exp., 103, from the 

 Eio Negro, Northern Patagonia, which is very nearly allied to 

 P. juncea, St. Hil., but a somewhat slenderer plant, and probably 

 distinct. 



(To be continued.) 



ON THE FLOEA OF NORTH-WESTEKN DONEGAL. 

 By Henry Chichester Hart, B.A., F.L.S. 



(Concluded from p. llJt). 



Polygo7iace(B. 



Piumex cony lorn eratiis, Murr. Frequent. F. 



R. sanguineus, L. Local. Greenfort, Gleualla, &c. F. 



Pi,, obtusijolius , L. Common ; near Ballyhooriskey, &c. F. 



R. crispus, L. Frequent by the shore. F. 



R. Acetosa, L. Common. F. 



R. Acetosella, L. Abundant. F. 



Polygonum amp)hihium, L. Common. F. 



P. lapathifolium, L. Not common. Carrablagh and Ballylar, 

 Fanet. F. 



P. Persicaria, L. Abundant. F. 



P. Hydropiper, L. Very common. F. 



P. aviculare, L. Common. F. 

 tP. Convolvulus, L. Frequent. . A bad weed in the crops. F. 



P. nmius, Huds. Very rare ; between Gweedore and Dunglow. 

 Flor. List. 



Oxyria reniformis. Hook. Extremely rare. In the Poisoned 

 Glen, in most of the gullies from about 500 feet to the 

 ridge, more especially in the deepest one at the southern 

 side with Saxifraga oppositifolia. Though I carefully 

 examined the surrounding mountains, glens, &c., I could 

 find no trace of the three alpine plants Thalictrum alpinum, 

 Saxifraga oppositifolia, and Oxyria reniformis, except in the 

 Poisoned Glen. 



KmpetracecB. 



Kmpetrum nigrum. L. Common. F. 



