56 Floristik und Systematik der Phanerogamen. 



Castanea), und eine zweite Gruppe der feuchteren Gegenden (Fehlen 

 der Xerophyten, Seltenheit der Feldulme, Häufigkeit der Edelkastanie), 

 als dritte Gruppe könnte man die Auenwälder mit Erlen bezeichnen. 



C. Schröter (Zürich). 



Mackenzie, K. K., Notes on Carex. I. (Bull. Torrey bot. Club. 

 XXXIII. p. 439—443. August 1906.) 



Descriptions of C. saximontana, C. concinnoides, C. mediterranea 

 and C. agglomerata. Trelease. 



MoRTENSEN, N. L, Danske Plantefamiiier [Danish Orders 

 of Plants.] [I. Scrophulariaceae.] (Flora og Fauna. Randers 

 1906. p. 65—85.) 



Analytical keys of the Danish plants of the natural order 

 Scrophulariaceae and remarks on their distribution with in the 

 country. C. H. Ostenfeld. 



Murbeck, Sv., Contributions ä la connaissance de la flore 

 du nord-ouest de l'Afrique et plus spdcialement de 

 la Tunisie. Deuxieme s^rie. (Lunds Universitets ärsskrift. 

 N. F. Afd. 2. Bd. I. No. 4. Bd. 11. No. 1. Lund, 23 Decemb. 

 1905. 83 pp. With 20 pl.) 

 In 1903 the author for the second time visited North Africa. 



The result of this voyage is published in the two papers referred to 



here. The publication consists of two parts, viz. 



1. Apercu de la Vegetation duDjebelBargou. Djebel 



Bargou is a mountain belonging to the Atlaschain of Tunis; 



its flora and Vegetation have been investigated only once before 



and nearly nothing has been published about it. The author divides 



the Vegetation of the mountain in 4 regions: 



1. The top-plateau (11 50— 1266 M. above the sea) has no 

 trees nor true shrubs^ only Phamniis prostrata and Cerasus pro- 

 strata occur as decumbent shrubs; among the herbs Asphodelus 

 microcarpiis is the most dominant species. 44 species are enume- 

 rated as characteristic for the region ; they are nearly all small 

 herbs and are growing in scattered spots leaving most of the 

 soil bare. 



2. The precipitious rocks below the plateau (1 000 

 — 1200 M.). The rocks, facing S. E., bear an extremely xerophytic 

 Vegetation, which can be taken as typical for North Africa; the 

 prominent species are enumerated. 



3. The slopes of the mountain, There is a marked 

 difference between the S. E.-slope and the N. W.-slope, the former 

 being covered with shrubs and trees, the latter being stony and 

 nearly sterile; this difference is due to human (Roman) influence 

 in,, former times. The shrubs are ever-green mediterranean plants 

 such as C/s/«s-species, Pistacia , Olea , Qnercus Hex etc. The 

 specimens are 1 to 3 meters high and grow often so densely, that 

 they form quite un-penetrable thickets. In the shade of the shrubs 

 many annual and perennial herbs are to be found, of which the 

 most prominent are enumerated. The Vegetation of the N. W.-slope 

 is herbaceous; among the most common species Thapsia garganica, 

 Thapsia villosa and Stipa tenacissima are to be mentioned. Several 

 parts of this slope are cultivated, mostly with corn (Hordeum) and 

 whcat (Trlticiun). 



