REPORT FOR 1913. 



515 



The filiform barren stems with some of the examples were produced 

 from roots grown on at Walton. — J. A. Wheldon. 



Equisetum arvense L., var. erectum Mey, f. ramosum Rupr. 

 Walton, S. Lanes, v.-c. 59, July 6, 1913. — J. A. Wheldon. 



Eqiiisetum arvense x limosum {E. litorale Ktihlewein). [Ref. No. 

 3825.] South shore of Loch Tummel, v.-c. 88, Mid Perth; very local. 

 The plants grew close to one another. Tube of stems intermediate in 

 diameter. Cones rarely produced ; small, abortive. Apparently new 

 for Scotland. It was seen, a week later, at the north-west end of the 

 loch, associated with the two species, in a somewhat stronger form. — 

 E. S. Marshall. " Although much less branched, and with shorter 

 branches than any of my examples from the Bisley locality, it agrees 

 well with them in all other respects." — J. A. Wheldon. 



Gymnogramme leptophylla Desv, Devil's Hole, Plemont, Jersey, 

 June 10, 1913. This beautiful little fern was only to be found in a 

 very young state, growing in a cave. — A. Webster. " A very 

 interesting contribution. I am pleased to say that only a few 

 specimens were sent in." — Ed. 



Azolla filiculoides Lam. Near Pangbourne, Berks, Sept. 1913. 

 Sent in order to correct the error in last Report, p. 220, where the 

 Berkshire plant was named A. caroliniana. This year, fruiting 

 specimens enable Mr N. E. Brown to name it as above. It is also 

 now abundant in the ornamental water at Nuneham Park, Oxon, 

 and in the Thames near Sonning. For the distinguishing features see 

 Report, p. 186, 1912. — G. C. Druce. See also Mr Marsh's paper on 

 Azolla in Britain and Europe, Journ. Bot., 1914, p. 209. 



Nitella opaca Agardh, fide Groves. Mud at bottom of water in 

 a shallow pool, 80 feet above sea level. Garth Head, S. Waas, Hoy, 

 Orkney, July 23, 1913. Plant slightly foetid. — H. H. Johnston. 



Nitella mucronata Miguel. Godstow, Oxon, Aug. 1892. In 

 abundance that year, but has never since appeared. See Report, vol. 

 i., 395, 1892.— G. C. Druce. 



Char a {Tolypella) glomerata Chevall. Pools on the sand dunes, 

 Ainsdale, S. Lanes, v.-c. 59, June 22, 1913. More robust than is 

 usual with our sand dune plant, but I suppose only C. glomerata. — 

 J. A. Wheldon. " Yes, but the authority for the species when in- 

 cluded under Chara is Desvaux, not Chevallier who placed it under 

 Nitella. Surely no one to-day can seriously contend that Tolypella 

 should be regarded as a sub-genus of Chara ! The Char em and 

 Nitellem must be kept distinct, whatever one does with the smaller 

 genera. To my thinking Tolypella constitutes a well-marked genus. 



