BOOK-NOTES, NEWS, ETC. 343 



Englished " Sulphur Clover." The names are very carelessly 

 printed — turning over the pages we note " Solidaga " (p. 126), 

 " Petroselinum sativum" (p. 103), " Pilularia lobulifera " (p. 316), 

 " xVnacharis Alsi??iastrum " (p. 211), "Orchis mztscula " (p. 250), 

 " Ilippoplue " (p. 221), " B?'aksedge " (twice, p. 272). The figures 

 are in most cases excellent, but no attempt has been made to 

 show the not inconsiderable additions to our Flora which have 

 been made since the last edition of the book was published. 

 There is an excellent index, but the general impression left by 

 the book is that if it was worth doing (as it was) it should have 

 been done better. 



BOOK NOTES, NEWS, dec. 



The Journal of Genetics issued in September (vol. vi, no. 1) is 

 entirely devoted to two papers by Prof. A. H. Trow — " On the 

 Number of Nodes and their distribution along the main axis in 

 Senecio vidgaris s^nd its segregates," and on "Albinism" in the 

 same plant. Prof. Trow has already published elaborate researches 

 into the life-history of this common weed ; in the first of these 

 papers — which is accompanied by a number of tables, showing 

 results obtained — he sums up the results of some years' observa- 

 tion on the " habit " character mentioned in its title — a character 

 for the study of which the Groundsel is especially adapted. 



The Neiu Phytologist for May-June (published July 21th) 

 contains an interesting paper, illustrated by plate and text-figures, 

 by Miss EUzabeth Acton, M.Sc, " On a New Penetrating Alga " 

 {Gomontia jS^gagropilcs), which appeared in an ordinary white pie- 

 dish in the laboratory of University College, Eeading. The dish 

 contained " Cladophora balls " collected a few years previously 

 from Loch Kildona, in South Uist : " pale green patches suddenly 

 began to form on the sides and floor of the dish which proved to 

 be the plant named," which also covered many of the dead cells 

 of the Cladophora. In the same number Mr. W. J. Hodgetts 

 figures and describes Dicranochcete reniformis Hiron., a species 

 new to Britain, found last April on the submerged stems and 

 leaves of Banunculus aquatilis and a Callitriche from a small 

 pond at Harborne, near Birmingham. The only other species of 

 the genus so far known is D. hritannica G. S. West, described and 

 figured in this Journal for 1912, p. 329. 



Our rubbish-heap flora has received an addition in Stipa 

 Neesiana Trin., which has been found and still exists as "a fine 

 vigorous clump, at Mortlake ; there is " a dust destructor close by 

 where hides are frequently destroyed ; we may infer that spikelets 

 attached to hides, probably from the Argentine, were introduced 

 with them, l^ecame detached somehow, and finally found their 

 way " to the place where the plant now occurs. The plant — a 

 native of South America — had occurred previously at Port 

 Juvenal, " the classical collecting ground of aliens near Mont- 



