224 TRANSACTIONS OF THE [Sess. lxxviii. 



1885, p. 135, writes as follows, with reference to the 

 specimens collected by Mr. W. A. Irvine Fortescue and 

 H. H. Johnston in 1885 : — " I have little doubt that this 

 has been seen by Dr. Boswell, yet I cannot but say I should 

 place it under natans in the absence of fruit to decide its 

 position." Mr. Arthur Bennett is still of the same opinion 

 with reference to the specimens collected on 29th September 

 1913 by H. H. Johnston. 



*Elodea canadensis, Michx. ( = Anacharis Alsin- 

 astrum, Bab.). — Stagnant water in an old quarry, near 

 Inganess Cottage, Saint Ola, Mainland, 5th May 1884, 

 H. H. Johnston {fide J. T. I. B. Boswell). Naturalised. 

 Plants neither in flower nor fruit. Extinct in this quarry 

 on 13th September 1913. See "Annals Scot. Nat. Hist.," 

 July 1895, p. 180. — Also growing plentifully in mud at 

 bottom of water in a quarry 250 feet above sea-level, 

 Berstane, Saint Ola, Mainland, 13th September 1913, H. H. 

 Johnston. Naturalised. Female plants only collected, 

 in flower with the corolla-tube reaching a length of 5| 

 inches and 7| inches. Mr. Arthur Bennett informs me that 

 " the male plant has only been found near Edinburgh " in 

 Scotland. The E. canadensis, Michx., was probably 

 accidentally introduced into Orkney by Mr. William 

 Cowan, who informs me that he brought plants of this 

 species in a tank to Inganess Cottage in 1869, for micro- 

 scopic purposes, and that he used the same bottles for 

 holding portions of this plant as for collecting specimens of 

 other aquatic plants from the old quarry in which the E. 

 CANADENSIS, Michx., was first found growing in Orkney. 

 The other quarry in which this species at present grows 

 is also in the neighbourhood of Inganess Cottage. I have 

 not found the \Vater-Th3m1e elsewhere in Orkney, but it is 

 not unlikely to spread to other parts of the county, if it 

 has not done so already. 



Eleocharis palustris, Roem. et Schult. (name con- 

 firmed by Arthur Bennett). — Shallow pool of fresh water 

 160 feet above sea-level, south-south-west of the Established 

 Church Manse, South Waas, Hoy, 23rd July 1913, H. H. 

 Johnston. Native. Common in the pool. Lowest glume 

 half surrounding the spike. Remark by Mr. Arthur 

 Bennett : — " Nice specimen showing creeping rootstock 



