456 Floristik, Geographie, Systematik etc. 



ergibt sich, dass die Poh^gonaceen eine eng geschlossene Familie 

 darstellen, für welche ein monophyletischer Ursprung angenommen 

 wird. Zwischen den einzelnen Gruppen und vielfach auch Gattungen 

 sind die Unterschiede meist wenig bedeutsam. Die Verwandtschafts- 

 verhältnisse der 3 Unterfamilien der Eriogonoideae, Polygouoideae 

 und Coccoloboideae werden in einem stammbaumartigen Schema zum 

 Ausdruck gebracht. Verschiedene Merkmale deuten auf eine grosse 

 Ursprünglichkeit der Polygonaceen hin. Auf Grund der Unter- 

 suchungen wird die Annahme verschiedener Autoren, welche die 

 Polygonaceen den Centrospermen zurechnet, widerlegt. Der An- 

 schiuss der Polygonaceen im System dürfte bei den Ranales in der 

 Nähe der Lactoridaceen und ivlenispermaceen möglich sein. 



Schüepp. 



Harnet, R., Enumeration o f Crassulaceae collected in 

 China by Bullock etc. (Notes Roy. Bot. Gard. Edinb. MIT. 

 37. p. 139-152. 1914.) 



An enumeration of the species of Sedtim collected in China 



by various coUectors. W. G. Craib (Kewi. 



Hemsley, W. B., The wood-oiltrees of China and Japan. 

 Kew Bull. Mise. Inform. N». 1. p. 1 — 4. 1914.) 

 In Kew Bull. 1906 Aleurites Fordii, Hemsl. and A. cordata, R. Br. 

 were clearly defined and separated. Wilson has since maintained 

 that there are 3 distinct species. The present paper gives a critical 

 account of the genus, to which Wilson's revised synonj^mj' and 

 new Classification is appended. It contains one new combination 

 Aleurites montmia, Wils. (= Veruicia inontana, Sour.). 



M. L. Green (Kew) 



Hill, T. G. and J. A. Hanley. The Structure and Water- 

 content ofShingle Beaches. (Journ. of Ecology. II. p. 21— 38. 

 1 pl. 7 figs. 1914.) 



Tvvo main objects of the investigation by the authors were: 

 to obtain information regarding the sequence and stratification of 

 the shingle beach; to investigate problem.s associated with the 

 fresh water content in the shingle. 



The structure of four distinct portions of Blakeny Point is 

 described and illustrated in detail, the results being obtained from 

 a series of excavations. Such a bank consists of stones, sand, and 

 mixtures of stones and sand, occasionally other materials, forming 

 strata more or less local in distribution and varying in thickness 

 according to the conditions of depositions. One Illustration shows 

 ihe surface distribution of Salicornia eiiropea, Pelvetia caiinlicidata 

 var. libera, Obioiie, and Siieda fniticosa, a series from the mar.-<h 

 on the landward side of the Point upwards to the deep shingle; 

 from measurements in 28 pits, the stratification is shown of sand, 

 mud, shingle, etc., in relation to the plants; the level at which 

 Standing water was found is also represented; supplementary dia- 

 grams and tables give further details Other portions of the Point 

 are illustrated in a similar graphic wa3\ 



The numerous excavations have furnishcd considerable oppor- 

 tunity for the observations on water-content. The results as to per- 

 ceniage of Chlorides are tabulated, and confirm the general opinion 

 that a shingle bank is water-bearing and supports, under certain 



