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NOTES ON JUUTLSH HAWKWEEDS. 

 Br H. W. PucjsLEY, 13.A., E.L.S. 



The followiiii^- notes have been compiled during an attempt to 

 work out the havvkweeds (about 250 gatherings falhng under some 70 

 species) that 1 have collected in various parts of Great Uritain durin*'- 

 the last 25 years. The genus, affecting principally, as it does, the rocks 

 of hilly and mountainous districts and embracing many conspicuous 

 and handsome forms, readily claims the attention of "^ the botanist 

 with a taste for climbing, and its complexity is sufficient to satisfy 

 the systematist's most voiucious ap]>etite for new s])ecies and varieties. 



The first account of the ijritish Hieracia, the monograph of 

 James Backhouse, Jun., published in 1850, gives satisfactory descrip- 

 tions of 83 species, correlating them, as far as possible, with known 

 continental forms. Backhouse's interest, however, was largely cen- 

 tred in the Alpina section, and his explorations were mainly confined 

 to Teesdale and the Braeniar and Clova Districts of Scotland. In 

 more recent years Mr. Hanbury, the brothers Linton, and the late 

 E. S. Marshall collected in many other Highland localities while 

 Augustin Ley did similar work in Wales, Avith the result that many 

 new forms were discovered and described. Mr. Hanburv made 

 notable additions to the Oreadea, and both he and the Lintons 

 greatly extended the lists of Suhvulgafa and Ccdsia. Finally, Augustin 

 Ley elaborated the Eu-vulgafa, introducing a number of new forms 

 identified Avith Scandinavian plants. 



A complete account of the genus appeared in 1902 in Mr. F. N. 

 Williams's Prodromus, in which some important characters, hitherto 

 overlooked, were brought to notice ; and in 1905 W. R. Linton's 

 British Hieracia was published, with descriptions of 124 species and 

 131 varieties. Tliis last-named book is by far the most useful to the 

 student, but a larger work, with a full and accurate clavis aceountinf>- 

 for every species, is still a desideratum ; and in this connection the 

 comparatively early deaths of W. B. Linton and Augustin hay are 

 nmch to be regretted. 



Sub-genus Pilosella, Sect. Colli:^ia. 



HiEKACiUM PEATENSE Tausch. — I collected this plant in 1916 at 

 Aviemore — apparently a new vice-county record for Easterness. It 

 was growing with other hawkweeds on broken ground near the rail- 

 wa}^, where its status is uncertain. Nageli and Peter, in their 

 Hieracien MiUel-Europas {Piloselloideii), and Gremli, in his Swiss 

 flora, adopt for this species the earlier name H. collinum Gochnat, 

 Tent. Cichor. p. 17 (1808). 



Sub-genus Aechieeacium, Sect. Amplexicaulia. 



H. PULMOi^AEioiDES Villars, Fl. Delph. iii. 138 (1789). 



Exsicc. F. Schultz, Herb. Norm. 707 ; Billot (continue) 3640. 



On July 31st, 1907, I collected this species on an old wall near 

 Kenmore, in Perthshire. In this situation it had presumably been 

 introduced, but its occurrence seems worthy of mention, as it dooeg 

 JouE^'AL OF Botany. — Vol. 58. [December, 1920.] z 



