1922-23.] liOTANICAL SOCIETY OF EDINBURGH 173 



but many failed to agree with any of tlie numerous varieties 

 that have been described. — M. arvensis, var. Nummularia, 

 Schreb. Fields west of Dunning. 



Polygonum heterophyllum, Lindm., and P. aequale, Lindm., 

 constitute the common sub-species of the aggregate P. 

 aviculare in Perth and Kinross. — P. heterophyllum, var. boreale, 

 Lindm., associated with Ranunculus reptans, L., on the sandy 

 shore of Loch Leven looks distinct, the succulence of the leaf 

 being quite pronounced. 



Rumex Hydrolapathim, Huds. River Earn, near Aber- 

 uthven. A gratifying extension in the range of this local 

 plant in Perthshire. 



Potamogeton polygonifolius, Pourr., var. cordifolius, C. & S. 

 Cow's Moss, Dunning.— P. decipiens, Nolte. The Earn 

 specimens come under var. latifolius, Hagst., but leaf-size is 

 no certain mark of distinction in this genus. — P. perfoliatus, 

 L. The type is common in the Earn. A state with very small 

 leaves and short internodes occurs in the Whitemoss Loch.— 

 P. crispiis, L., var. planifolius, Meyer. River Earn, about a 

 mile above Dalreoch Bridge. — P. panormitanus, Biv. Keltic 

 Pond, Dunning. Passed as a form of pusillus until Hagstrom 

 in his recent researches drew attention to the differences 

 between the two species. — P. trichoides, Cham, et Schlecht. 

 Whitemoss Loch. An addition to the list of Scottish plants. 

 See Mr. A. Bennett's paper in Trans. Perth. Soc. Nat. Sci., 

 vol. vi, p. 6, 1914.— P. pectinatus, L. A slender state. Dis- 

 covered in Keltic Pond, Dunning, July 1919. Not an un- 

 common species, but hitherto unrecorded from Perthshire. 



Zannichellia palustris, L. Keltic Loch. Very rare. See 

 my note in Trans. Perth. Soc. Nat. Sci., vol. vii, p. 74, 1920. 



Carex pulicaris, L., /. montana, Pugl. Turfy ground, Ben 

 Ledi, 87 West Perth. 



