206 Floristik, Geographie, Systematik etc. 



Lindman, C. A. M., Some cases of plants suppressed by 

 other plants. (New Phyt. XII. 1. p. 1—6. 1 pl. 1 fig. 1913. 



Several examples of suppression of plants by other plants are 

 given. Urtica dioica seems capable of suppressing other plants en- 

 tirely. In dark forests the Beech and the Spruce have the same 

 suppressing effect on the Oak. The Yew is also referred to. Examples 

 of herbaceous plants which have this power of suppression are 

 Hypochoeris ttiaculata and Juncus squarrosus. M. L. Green. 



Longo, B., Sur le Ficus Carica en Italic. (C. R. Ac. Sc. Paris. 

 CLIV. 12 aoüt 1912.) 



L'auteur discute et refute les affirmations de Tschirch et Ra- 

 vasini tendant ä faire admettre l'existence ä l'etat sauvage en 

 Italie d'un prototype, trfes constant, du Caprifiguier et du Figuier 

 domestique, ä la fois male et femelle; il n'a pu trouver ce proto- 

 type ni ä Rome, ni en Toscane,nienCalabre. De plus les 

 fleurs galles sont bien des fleurs, car elles renferment des ovules, 

 comme Solms-Laubach l'a montre depuis longtemps. 



L. Blaringhem. 



Magnin, A., Sur les especes biarealesjurassiennesetun 

 mode de representation de leur distribution geogra- 

 phique. (Referat aus: Verhandl. Schweiz, naturf. Gesells. II. p. 

 210-212. 1912.) 



Verf. bespricht die „doppelarealigen" Pflanzenarten im franzö- 

 sisch-schweizerischen Jura, welche ihre Verbreitungsbezirke an den 

 beiden äussersten Enden des Jurabogens besitzen. Diese Areale 

 sind die westlichen Grenzpunkte des allgemeinen Vertreitungsbe- 

 zirkes pontischer oder alpiner Pflanzen, welche durch die zwei Ein- 

 wanderungswege der Donau und der Rhone an die Grenzen des 

 Juras gelangt sind oder über die beiden Kalkstreifen nördlich und 

 südlich der Alpen. 



Beispiele von Arten mit doppeltem Endareal sind: Primula 

 auricula, Gentiana asclepiadea, Saxifraga nintata u. A. 



E. Baumann. 



Oliver, F. W., Some Remarks on the Blakeney Point, 

 Norfolk. (Journ. Ecology. I. 1. p. 4—15. 1 fig. 1913.) 



The first contribution to this new Journal is appropriatel}' a 

 contribution to one of the newest and most striking advances on 

 habitat and Vegetation. The area has been under Observation by 

 the author and his pupils for 3 years, and as it has now passed to 

 the National Trust, it will be a reserve of natural Vegetation pro- 

 tected. The Point presents many unique features, especiallj' its long 

 System of shingle beaches of different ages, its sand dunes, and 

 salt marshes, an area of waste lands „which consist in their entirety 

 of various grades of materials classified and thrown up b}' the sea 

 on a continuous and orderly System." The shingle System extend- 

 ing for 8 miles (13 kilom.) is attached to the mainland at one end, 

 but is free at the distal end, and in its more recent parts consists 

 of a mobile shingle of pebbles. A marked feature is the occurrence 

 of a number of lateral hooks which extend landwards almost at right 

 angles to the mainbank. The laterals are thus washed by the shel- 



