REPORT FOR 1912. 



301 



Equisetum variegatum, Schleich. Pools on sand hills, Ainsdale, S. 

 Lanes., v.-c. 59, April 27, 1912.— C. Waterfall. "No; this is E. 

 palustre, L., var. nudum, Newman, or very near it." — E. S. Marshall. 

 " One stem of E. variegatum and several of E. palustre, on my sheet. 

 The latter is in a simple, slightly branched or entirely unbranched 

 form." — J. A. Whkldon. "My specimens were mixed." — G. C. 

 Druce. 



Pteridium aquilinum, L., var. lanugi7iosum (Bory), vel Pteris aquil- 

 ina, L., var. lanuginosa, Bory. Stow Wood, Oxon, with Dr Stapf and 

 Dr Domin, Oct. 1912. This form characterised by the hairs on the 

 under surface of the pinnae. Dr Domin pointed it out to me. See 

 Report 1912, p. 185.— G. C. Druce. 



Asplenium marinimi, L. Carboniferous limestone rocks, facing 

 sea. Puffin Island, Anglesea, v.-c. 52, May 18, 1912.— C. Water- 

 fall. 



Lastrea alpina, Wollaston. Origin, rock clefts on Braeriach at 

 2800 feet, Easterness, July 1909. Cult., Walton, 1912. This remains 

 constant in cultivation. Its habit is strikingly different from that of 

 L. aristMta, the lowest pair of pinnae being placed at a different angle 

 from the other, giving the frond a shuttlecock-like appearance. This 

 is not evident in dried specimens. See Report 1911, p. 145.— J. A. 

 Wheldon. 



Isoetes hystrix, Durieu. Damp ground, near Fort le Marchant, 

 Guernsey, Aug. 8, 1912.— W. C. Barton. 



Azolla filiculoides, Ijam. Woodbastwick, Norfolk. I noticed this 

 last year, but did not collect it, and too rashly assumed it was A. 

 caroliniana, Willd. Dr Ostenfeld, who took some, names it as above 

 (see Report 1912, p. 186). I owe these specimens to the kindness of 

 the owner of Woodbastwick, J. Cator, Esq., M.P., who sent me them 

 in late August when the plant was fruiting freely. When in fruit 

 the glochidia which are without septa offer a definite means of 

 identification. In caroliniana (teste N. E. Brown) the glochidia 

 are septate. — G. C. Druce. 



Azolla Jiliculoides, Lam. In brackish water near Queenstown 

 Junction, Co. Cork. Noticed but not collected by me on the Internat. 

 Phyt.-Geog. Excurs. and assumed to be A. carolinie7isis, but those 

 specimens kindly supplied by K H. Beamish, Esq., Oct. 1912, prove 

 it (teste N. E. Brown) to be the above species. — G. C. Druce. 



Nitella gracilis, Agardh. Perranzabuloe, West Cornwall, v.-c. 1, 

 Oct. 19, 1912. Coll., F. Rilstone and C. C. Yigurs. "Mr Rilstone's 



