96 
THE JOURNvVL OF EOTANY 
Iisr Bot. Tidsshrift , xxxvii. part 5 (1922), Mr. J. Clausen con¬ 
cludes the “ Studies on the Collective Species Viola tricolor L.,” 
the first part of which appeared in part 3. In this paper (which is 
written in English) he discusses at length the varying characters of 
V. tricolor and V. arvensis ; he concludes that the two are distinct 
species, and discusses what is typical for each, with interesting notes, 
based on his own observations, on the geographical distribution in 
Denmark. The paper is illustrated with numerous figures and should 
interest British botanists : Mr. Clausen is apparently unacquainted 
with Dr. Drabble’s paper on “The British Pansies,” issued as a 
supplement to this Journal for 1909. The preceding part (4) of 
the Tidsshrift contains descriptions of new Danish ILieracia , by H. 
Dahlstedt, and an exhaustive study (in Danish) of Fmpetrum nip rum 
by 0. Hager up. 
The Journal of the Boyal Horticultural Society , xlviii. part 1 
(Jan.), contains an interesting paper on “ The Wilt Disease of Michael¬ 
mas Daisies,” by Mr. W. J. Dowson, Mycologist to the Society. The 
disease is caused by Cephalosporium Asteris , which is described as a 
new species. It acts by the production of toxic substances and not 
by the mechanical blocking of the vessels and tracheids by mycelium. 
The mycelium of the parasite is localized in the base of the plant 
during spring and early summer, and does not occur in the suckers. 
By striking cuttings taken from the tips of the suckers it was found 
possible to raise healthy plants from diseased stock. 
Tiie latest fascicle of the Flora Batava (f. 410e-413e Aple- 
vering ; M. Nijhoff, ’s Gravenliage, 1922) is mainly occupied with 
coloured figures and descriptions (in Dutch and French) of fungi, of 
which the most interesting appears to be Lepiota oclorata Cool, a 
species discovered in 1916 in three places in Holland. 'There are also 
figures and descriptions of Bubus hirtifolius , B. sulcatus , and 
B. Lindleyanus , and of Boltonia asteroides L’ Herit. and Nicotia n a 
affinis T. Moore, whose claims to insertion rest on the finding of 
specimens near a flour-mill and an oil-mill respectively ; the history 
of the latter, a plant of garden origin, is discussed at some length. 
In the Gardeners' Chronicle of Dec. 23, 1922, Mr. 11. F. 
Brotlierston gives a sketch of the life and work of Mrs. Loudon (1807- 
1858) ; this is supplemented by Mr. Britten in the issue for Feb. 10, 
who speaks of her as “ one who in her time did much to advance both 
botany and gardening, and whose memory may well be recalled.” 
In his recent “ Additions to the Flora of South Australia ” (Trans. 
It. Soc. S. Australia, xlvi. : 1922) * Mr. J. M. Black figures and 
describes a new genus of Umbelliferse Hydrocotvleje—a curious little 
plant with the habit of Bidiscus —to which he gives the name 
Uldinia, from the native name for Ooldea, where it was found. 
The Quarterly Summary of the Boyal Botanic Society for 
January contains the first part of a lecture on the flora of our new 
Tropical African possessions, delivered by Prof. B. B. Gates before 
the Society in November last. 
