122 ANNALS OF SCOTTISH NATURAL HISTORY 



1862, and was awarded a Fellowship in Trinity College. In 1865 

 he became Professor of Mathematics in Owens College, then one of 

 the constituents of the newly formed Victoria University. Here he 

 taught until 1885, when he resigned the Chair; and he afterwards lived 

 at Whaley Bridge and at Buxton until his death, at the age of 69, 

 in November 1907. Although chiefly a mathematician, he had a 

 strong taste for the study of plants, especially of the microscopic forms 

 of freshwater Algae, to which he gave attention during his visits to 

 Scotland. He did not publish results of his work ; but he gave 

 a very marked evidence of his botanical tastes in leaving a large 

 sum of money to Manchester University for the advancement of 

 botanical and mathematical studies. 



Notes on Plants from Scotland. Miss Fowler of Inverbroom 

 has found Teesdalia nudicaulis, hitherto not recorded from the vice- 

 county 105, on shingle by the river at Inverbroom. 



Dr. Domin has named a Thyme which I collected at Duns, 

 Berwickshire, as T. Serpyllum, L., x ovatum, Miller. I have Thymus 

 ovatum, Miller ( = T. Chamcedrys of British authors, not of Fries) 

 from Newton Stewart and Port William in Wigtownshire, and from 

 Tummel in Mid Perth, also T. glabrum, Miller ( = T. Cham&drys, 

 Fr.) from Ben Heasgarnich in Mid Perth, and Ben Laoigh in 

 Argyll, and Strath Carron in West Ross. 



I noticed Bromus leptostachys, Pers., growing by the Tay, in Perth, 

 in July 1907. G. CLARIDGE DRUCE. 



Critical Study of Ranunculus aquatilis, Z., var. y. In his 

 very full study of the forms included under this head (" Journ. Bot." 

 1908, pp. 11-22, 44-52), Mr. F. N. Williams, after a discussion of 

 the many opinions expressed and varied synonyms, groups them 

 under the species R. divaricatus, Schranck ( = R. Drouettii of British 

 Floras), and R. trichophyllus, Godron, each wiih varieties, some of 

 which include " forms." These are defined, and their distribution 

 is indicated. Of the British types the following are indicated by 

 him from Scotland : 



1. R. divaricatus, Schranck, var. communis, world-wide. Var. 

 eradicates (Lsestad.), in British Isles found only in lochs of Fingask 

 in Perth and of Rescobie and Balgavie in Forfar, flowering and 

 fruiting two to five feet under water, recorded as R. trichophyttus, var. 

 demersus. N. E. BROWN (" Eng Bot," ed. 3, supp. 1891). 



2. R. trichophyllus, Godron, var. communis. " In Scotland it 

 extends north of the Caledonian Canal as far as the Orkney Islands. 

 South of the Caledonian Canal it is recorded in nine counties " 

 Dumfries, Kirkcudbright, Ayr, Lanark, Stirling, Perth, Angus, 

 Dumbarton, and Buteshire. Var. terrestris, Godron, Nairn. 



