1921-22.] BOTANICAL SOCIETY OF EDINBURGH 113 



Bennett). — Mud at bottom of stagnant water, Birsay, Main- 

 land, 26th July 1883, H. H. Johnston ; and mud at bottom 

 of shallow water in a loch, 11 feet above sea-level. Loch 

 Echna, Burray, 27th July 1914, H. H. Johnston. Native. 

 Rare at Loch Echna. Plants in fruit at both stations. A 

 new record for this form for H. C. Watson's county No. Ill 

 Orkney. 



POTAMOGETON PANORMITANUS, Blvoiia {fide Arthur 

 Bennett). — Mud at bottom of water in a loch, 49 feet above 

 sea-level. Loch of Kirbister, Orphir, Mainland, 9th August 

 1878 (plants in unripe fruit) and 30th August 1880 (plants 

 not in flower or fruit), H. H, Johnston. Native. A new 

 recoi'd for this species for H. C. Watson's county No. Ill 

 Orkney, published by Dr. G. Claridge Druce in " Bot. 

 Exch. Club Secretary's Report for 1920," p. 152 (September 

 1921). 



PoTAMOGETON LUCENS, Linn, (name confirmed by Arthur 

 Bennett), and var. insignis, Tiselius {fide Arthur Bennett). 

 — Mud at bottom of water, 11 feet deep, in a loch, 323 feet 

 above sea-level, Muckle Water, Rousay, 23rd July 1921 

 (plants in flower-bud) and 22nd August 1921 (plants in 

 full flower), H. H. Johnston. Native. Common. Plants 

 submerged in water except the flower-spikes, Mr. Arthur 

 Bennett, to whom all my specimens were submitted, writes 

 as follows, in a note dated 1st December 1921 : — " There is 

 no doubt the whole of these specimens must be named P. 

 LUCENS, Linn. As a rule the leaves are narrower than the 

 type specimen in the Linnean herbarium. I have looked up 

 my seventy-six specimens from all over the world where 

 LUCENS occurs and there is nothing that exactly matches 

 your specimens." A few of my specimens Mr. Arthur 

 Bennett has identified as var. insignis, Tiselius. Confirms 

 the record of this species from Orkney (no station men- 

 tioned) in the Rev. Dr Barry's " History of the Orkney 

 Islands." ed. ii, p. 278 (1808); and the var. insignis, 

 Tiselius, is a new record for H. C. Watson's county No. Ill 

 Orkney. See " Journ. Bot.," No. xiii, p. 16 (January 1864) ; 

 Watson, " Top. Bot.," ed. ii, p. 417 (1883), where county 

 No. Ill Orkney is shown thus " [10, 111, 112; errors?]"; 

 " Annals Scot. Nat. Hist.," No. 31, p. 171 (July 1899) ; 

 Bennett, " Suppl. Top. Bot.," p. 84 (1905) ; Spence, " Flora 



