POLYGONACE^. 297 



with the aiTangement adopted in the London Catalogue, ed. 7. (See 

 Jour. Bat. v. K.S. 27, 28 ; and Bot. Ex. Club. Eejp. 1875, 25.) 

 Fii-st record : Briggs, 1876. 



609. R. Acetosa, L. Common Sorrel; 'Sour Sabs' (Sauced). 



Native; in pastures, marshes, meadoAvs, and on hedge-banks. 

 Very common. May, Jmie. Area general. 

 Occurs in the immediate neighbourhood of the toAvn, and ranges from 

 the coast to Dartmoor. 



610. R. Acetosella, L. Sheep's Son-el. 



Native ; on dry or rocky banks, in hilly and barren pastures, and 



on open moors and commons. Very common. May to July. 



Area general. 



Occurs m the immediate neighbourhood of Plymouth, and is found in 



both the enclosed and open portions of the area. Very partial to the 



gTanitic tracts. 



POLYGONUM, L. 



611. P. Convolvulus, L. Climbirig Buckv)heat. 



Native or Colonist ; amongst corn and other crops, in recently 

 disturbed waste ground, and on earthy hedge-banks. Very 

 common. July to October. Area general. 

 Distributed over the cultivated and enclosed portions of country. 



612. P. aviculare, L. Common Knotgrass. 



Native ; about paths and cattle-sheds in fields, by roadsides, and 

 in cultivated ground. Very common. June to November. 

 Area general. 

 An abundant weed ; the var. c. arenastrum is quite common, and 

 occurs in all the Districts ; on the shore between Mount Batten and Jenny 

 Cliff a narrow-leaved form of it, August, 1872. The var. a. agrestinum 

 I believe to be also common ; I have noted it for Districts ii., iii., and v. 

 A striking plant, from a field at Pennycross, sent to the Botanical Ex- 

 change Club some years ago, and which has since been seen in the locality, 

 Dr. Boswell said he believed to be var. d. mio'osjyermum. I refer to this 

 a plant occurring at Penny comequick (District iii. ), and near Egg Buck- 

 land (iv.). What seems to me e. rurivagum I have noticed at St. Johns 

 (ii.) and above Bigbury Bay (v.). The striking variety/, littorale grows 

 at Whitsand Bay {Keys, Ft. iii. 213), where I saw it on the sandy shore 

 between Seaton and Downderry (District i.), in 1876 ; also at Wembury 

 {Hore, id. et. ib.), whence I forwarded specimens to the Botanical Ex- 

 change Club in 1867 ; and by the Erme estuary, on the Kingston side 

 (District vi.). 



