58 
TIIE JOURNAL OE BOTANY 
plant is the fruit, and if hairy-fruited plants are admitted into 
Physotrichia the real distinction between that genus and Diplo- 
lophium breaks down. On the other hand, by restricting Physo¬ 
trichia to papillose-fruited plants, the distinction between the two is, 
as Umbelliferous genera go, well marked. 
REVIEWS. 
A Summer in Greenland. By A. C. Seward, Master of Downing 
College and Professor of Botany in the University of Cam¬ 
bridge. Cambridge at the University Press, 1922. Cr. 8vo, 
cloth, pp. xi, 100 ; 29 plates, 2 maps. Price 7s. n. 
In this attractive little volume, Prof. Seward gives an interesting 
account of an expedition undertaken in 1921 with the object of 
obtaining “ as representative a set of fossils as possible for the British 
Museum and for Cambridge,” inspired thereto by an examination of 
the collections in the Museums of Copenhagen and Stockholm. His 
object was attained by the acquirement of nearly a thousand speci¬ 
mens of fossil plants, most of which will be sent to the British 
Museum when their description has heen completed; in addition to 
these, collections of the recent flora, including flowering plants and 
cryptogams, were made, which will be distributed to Kew and other 
museums. An account of the fossil and recent plants naturally 
occupies a considerable portion of the book, but its interest is not 
confined to these ; there is a summary of the early colonisation of 
Greenland, followed by a sketch of the physical and geological history 
and a description of the fossil-bearing rocks and of glaciers and ice¬ 
bergs, with an account of the Eskimoes and their industries, and of 
the system of government by the Danes. 
About two hundred specimens of flowering plants were collected ; 
no list is given, but there is a grea-t deal of information regarding 
many of the species, conveyed in the interesting manner which cha¬ 
racterises the book throughout. “The abundance of flowers makes 
an unexpected impression upon a visitor imbued with the idea of a 
country practically buried under a mass of ice of unknown depth and 
of a long winter when the sea is frozen and even the coastal regions 
are covered with snow. One effect of arctic conditions is to limit the 
production of foliage shoots and often to induce an abnormal develop¬ 
ment of subterranean stems and roots and a prolific crop of flowers ” ; 
Prof. Seward says that the root of one Willow dug up was traced for 
at least twelve yards growing horizontally not many inches under¬ 
ground. The colour effect of large patches of Dandelions, Willowherb. 
Yellow Poppies, Diagensia , Pliyllodoce, Dryas , with species of 
Ranunculus and Potentilla , is very striking; although “ not equal in 
brilliance to Alpine meadows at their best,” in the more favoured 
situations there is a paradise of flowers characterised by a harmonv 
of colour in keeping with the sombre grandeur of the setting. . . . 
“ The geographical distribution of many of the Greenland flowering 
