174 Floristik, Geographie, Systematik etc. 



Moore, S. le M., AI abäst ra divers a. XXIII. (Journ. Bot. LI. 

 p. 208-217. July 1913.) 



The following new species are described by Mr. S. Moore 

 except where a different author is given. Fadogia Rogersii, Wern- 

 ham (Congo), Cephaelis aiistralis, Wernham (Congo), Helichrysunt 

 squamosifolium, (Congo), Gnaphaliuni araneosum, (N. W. Rhodesia), 

 Thunbergia Monroi, (Rhodesia), T. Kassnerü, (Congo), T. valida, 

 (Rhodesia), Synnerna Umnophiloides, (Angola), Dyschoriste decova, 

 (Congo), Dispevma scahridum, (Angola), Blepharis Kassneyi, {Congo) , 

 Cyossandra pinguior, (Congo?), C. Wayneckii, (Germ. East Afr.), Le- 

 pidagathis sciaphüa, (Belgian Congo), Jiisticia umhratiUs, (Lake 

 Moero). M. L. Green (Kew). 



Oliver, F. W. and E. J. Salisbury. Topography and Vege- 

 tation of ßlakeney Point. Norfolk. (Repr. Trans. Norfolk 

 a. Norwich Nat. Soc. IX; issued from Univ. Coli. London. 58 pp. 

 17 figs. 1913.) 



This booklet is issued in a convenient form at a small Charge as 

 "an epitome of the salient facts of the Constitution and distribution 

 of the plant populations of the maritime waste lands known as 

 Blakeney Point"; the area is now a nature reserve for the study 

 of Vegetation. The features are amply illustrated by diagrams and 

 photographs useful for readers without local knowledge. 



Part I describes the topography (see also Bot. Cent. 123. p. 206), 

 of the long shingle bank with its numerous hooks on the landward 

 side projecting into an area of salt marsh. The complex and chan- 

 ging topography of the distal end is shown in one diagram with 

 phases dating from 1886, 1897 and 1911 respectively. The marshes, 

 the stabilising effect of Vegetation, and the mobility effects along 

 the main beach are other topics. 



Part II gives a preliminary account of numerous observations 

 made by the floristic section of workers. Considerable attention has 

 been given to Suoeda fniticosa as a coloniser of mobile shingle, 

 this plant remains relatively stable whereas the shingle is borne 

 landwards, so that the younger plants occur on the landward mar- 

 gin while the older plants occur nearer the sea on the middle 

 crest of the bank. Festiica rubra, Arenaria peploides, Siletie maritima, 

 Glauciutn luteum, and Runiex trigranulatus are dealt with as other 

 colonisers of the shingle. Depressions towards the landward margin 

 are occupied by Poa annua, and here the rarer species Desmaseria 

 loliacea and Lepturus filiformis find a place. A halophytic element 

 also occurs on the shingle and its origin is traced so that the 

 species are regarded as relicts of a former extension of the salt 

 marsh now overwhelmed by shingle. An arenicolous element is 

 also present. A list of 60 species is given from the main shingle bank. 



The Vegetation of the lateral hooks presents zones which are 

 dealt with in order: 1) Suoeda fruticosa, 2) Festuca rubra, 3) Statice 

 binervosum etc. Colonisation of the shingle bank begins with forms 

 with extensive Underground Systems, forming an open association 

 which is later replaced by species preferring a more stable habitat. 

 The factors of distribution are discussed at some length with refe- 

 rence to Statice binervosa, including measurements of plants from 

 different parts of the bank; Plantago coronopiis is dealt with on the 

 same lines. 



The dunes are based on a foundation of shingle, one group 



