18 THE JOUENAL OF BOTAT^T 



(1840). The author refers Fries's plant to P. semifructus Ar. Benn. 

 ap. Graeb. Das Pflanzenreich, 138, 1907 (nomen) = P. mucronatus X 

 obtusifolius. This plant 1 have from Wire Mill Pond, SuiTey, 1882 

 {Beehy), and Clunie Loch, Perth, 1882 (Sturrock). P. obtusifolius 

 fruits more freely than any other of the grass-leaved species; a 

 specimen from Stalham, E'. Norfolk, has eleven peduncles, one of 

 which has thirty-two well-formed fruits. When growing from 

 winter-buds (turios) in April, the first seven leaves are. only 18 nam. 

 lonp-, witli an almost square apex, the central lacuna3 forming 

 one-third of the leaf -width. 



P. Friesii Rupr. (p. 94). Sweden to 61" 15' n. lat. {Ragstrom) ; 

 Bouth Norway] Finland to 62° n. lat., Kihlman sp. ; 66° 59' 

 (Hult) Vienna herb. ; Scotland to Caithness, Orkney, and Outer 

 Hebrides. Var. majus S. F. Gray, Nat. An. Brit. pi. 35 (1821) = 

 latifolius (Huthe herb.) ap. Fischer, Ber. Bayr. Bot. Ges. xi. 100 



(1907). 



P. PANOEMiTANrs Biv.-Bernardi, p. 98 (1838) 6; P. gracilis 

 Fries, Nov. Fl. 8uec. 50 (1828), teste Hagstrom. This plant, con- 

 sidered as a var. of lousillus, has been little noticed by writers on the 

 genus. It is incidentally named by Babington and by myself in 

 Journ. Bot. 1881, pp. 11, 67, 242, and by Morong in Macoun's Cat. 

 Canadian Plants, 87 (1888). Hagstrom figures and describes fully 

 the differences between this and inisillus, one of the principal of 

 which relates to the stipules (ligules) : in panormitanus these are 

 connate (as shown by his figure 39), m imsillus they are not so, and 

 numerous other differences are set forth at much length. I have 

 specimens from pond nr. Lewes, E. Sussex, 1895, Hilton ; Amberley 

 and Sidlesham, W. Sussex, 1901, Marsliall ; Surrey, coll. by myself 

 in 1881 and by Nicholson in 1882 ; Salop. 1881, Bechivith ; Caer- 

 narvon, Llandudno, 1869, C Bailey ; Cambridge, Chatteris, 1886, 

 Fryer ; Anglesea, Cors Bordialio, 1892, Griffith ; Cardigan, Aber- 

 anth, 1899, Marshall ; Wexford, ditch n. of harbour, 1896, 

 Ilarshall ; Kirkcudbright, Ketton, 1884, Coles ; E. Inverness, 

 Beauly, 1894, Marshall ; Fife, Loch Leven, 1909, West ; Isle of 



Lismore, v.c. 98, 1898, Mac vicar ; Caithness, Loch] Scarmlett, 1914, 



W. Lillie. 



All our specimens called p)usillus will have to be examined to 



show to which species they belong; I have determined those from 



the preceding localities. 



P. pusiLLUS L. (p. 121). Sweden to S. Lapland ; Norway to 



Naeseby ; Finland to Svjaitoy-noss at 68° 10' in Russian Lapland ; 



Scotland to Shetland {Beehy). 



*P. pusiLLTFOKMis Hagstrom (P. 'pusillusY.Friesii Rupr.) 



(p. 97). The author, gives no Enghsh localities : I have it from 



lietchcott, Salop, 1882, Beckwith ; Coulterhouse, Sauchie, Stirling, 



1892, Kidston. 



P. Stureockii Ar. Benn. (p. 117). The author regards this 



species, known onl}-- from Scotland, as P. ohtusiflorus Xj^anonnitaniis, 



but my specimens have plenty of good fruit and I therefore cannot 



accept this conclusion. 



P. TEICHOIDES Cham. & Schlecht. Sweden at 56° 50' n. lat. 



{Winslow) ; Scotland at bif 18' n. lat. {Barclay Sf Mattheios). 



