BODEN UND KLIMA 237 



form the subject of a separate communication to these pages ; 

 for the present it is enough to say that the specimens are of 

 Broughton's collecting, but the drawings, which are striking and 

 interesting rather than "exquisite," are by John Lindsay, many 

 being signed by him. Mr. White refers to "an anonymous volume 

 of brief descriptions of British plants " published by Broughton ; 

 the description seems to apply to Enchiridion Botanicum (1782) 

 but the title-page is inscribed " edidit Arthurus Broughton, 

 M.D." — possibly " edidit " has been considered an equivalent of 

 "edited"? 



The " MS. Flora of Somerset " by Sole mentioned (p. 72) as 

 having been in the possession of T. B. Flower is, I think, more 

 correctly called " Flora Bathonica " : Thomas Clark, in the refer- 

 ence given by Mr. White, speaks of it only as a " MS. flora," and 

 there is, so far as I know, no evidence that Sole had sufficient 

 knowledge of the w4iole county to enable him to produce a flora 

 of it. Our mention of the work as "Flora Bathonica" in the 

 Biographical Index — which does not appear in the list of " books 

 consulted " by Mr. White — was, if I am not mistaken, derived 

 from Flow^er himself ; it is regrettable that it should have been 

 lost, as Mr. White's reference to it leads me to suppose. 



James Britten. 



Boden unci Klima auf kleinstem Baum. Versuch einer exahten 

 Behandlung des Standorts auf dem Wellenkalk, Von Dr. 

 Geegor Kraus, Professor der Botanik. Mit einer Karte, 

 7 Tafeln und 5 Abbildungen im Text. Gustav Fischer, Jena, 

 1911. 8 Marken. 

 Prof. Kraus has previously published excellent researches on 

 the question of calcifugous and calcicolous plants, and in the 

 present volume of one hundred and eighty-four pages he adds 

 considerably to our knowledge of this interesting and disputed 

 problem. There is here a minimum of general and evasive dis- 

 cussion of such academic problems as to whether the physical or 

 the chemical factors of the soil are the more important, and a 

 maximum of exact and experimental data. In the first part 

 (" Das Karbonat des Wellenkalkbodens "), results of a great many 

 soil analyses are given of stations of chalk-loving and other plants, 

 and in the second (" Bodenphysikalisches und Klimatisches "), 

 these are compared with accompanying physical data. 



In the opinion of the reviewer the vexed question of the 

 influence of lime on plants will only be finally settled by the 

 application of Dr. Blackman's theory of limiting factors. The 

 habitat of a plant is a complex of factors. In the case of a chalk- 

 plant or lime-plant, the amount of calcium carbonate in the soil 

 is only one of these factors ; and experiments are required for the 

 purpose of showing how the other factors are affected by variation 

 of the lime-content. It is not merely the calcium carbonate 

 which affects the plants. The Oxlip {Primula elatior Jacquin) in 



