350 THE BOTANICAL EXCHANGE CLUB OP THE BRITISH ISLES. 



summarily dismissed in favour of the more recent betulifolia Torrey, 

 but it was taken up by Loudon and was well known to horticulturists 

 under that name. His specimen too exists at Cambridge. The 

 Lombardy Poplar is made a variety of P. nigra as var. italica ; many 

 good botanists consider them distinct species. The Wych Elm is 

 given as U. montana Stokes, and is said to be one of the parents of 

 U. veg eta and U. major, the latter name being used, notwithstanding 

 Smith's citation of Miller's hollandica for his major, under it is var. 

 Daveyi Henry. U. nitens Moench is chosen for Miller's U. glabra, 

 and under this is put " var. stricta Aiton, the Cornish Elm," but 

 incorrectly as Aiton did not use the name U. nitens. This is surely 

 as distinct a species from nitens as Salix vitellina is from 8. alba. 

 Var. Wheatleyi Simon-Louis Cat. (1869) 98 = sarniensis. U. minor 

 Mill, is used as synonymous with U. Plotii Druce, and Henry says 

 U. sativa Mill, is undoubtedly the English Elm (p. 1901), and that 

 Plot's Elm (Nat. Hist. 158, 1677) is identical with viminalis • a state- 

 ment made without due examination, since Plot's Elm is not viminalis 

 as his specimen in Herb. Brit. Mus. shows, and as is also borne out by 

 contemporaneous specimens of Stonestreet ; moreover in describing it, 

 he states that it is a new species and differs from Goodyer's Elm. U. 

 campestris is used for the English Elm (but what part of U. campestris 

 L. Sp. PL, 1753, is the English ElmJ) and to it is wrongly referred 

 the Tubney Tree, which is said to grow in Oxfordshire, but the locality 

 is in Berkshire and belongs to U. glabra Miller. The much desired 

 Index is included. 



Synopsis der Mittel-europaeischen Elora. Paul Ascherson 

 and Paul Graebner. Engelmarm. Leipsig. 77 and 78 Lief. Marz 

 26, 1913. 4 marks. pp. 801-885. Polygonaceae contd. Poly- 

 gonum tomentosum (p. 812) is used as in my List = P. 

 maeulatum Kit. in Linnaea xxxii., 364, 1863. P. nodosum Pers. 

 (1814) is used instead of P. Lapathifolium L., while the var. incanum 

 is put under tomentosum, but each of the three species has its incanum 

 form, and in my experience the two latter exhibit it more frequently 

 than the former. P. Persiearia has its var. biforme Fries Nov. Fl. 

 Suec. ii., 28, 1839, which is earlier than var. elatum Gren. k Godr. 

 Fl. Fr.; the var. prostratum Breb. is replaced (p. 822) by var. ruder ale 

 Meissn., and var. tomentellum replaces var. incanum Gren. & Godr., 

 but the reason is not obvious. Hybrids of tomentosum x Persiearia 



