Floristik, Geographie, Systematik etc. 233 



Calliina dominant or mixed with heath grasses [Festiica ovvia, Aira 

 flexiiosa, Navdiis stricta etc.). 



B. The Vegetatio)i of the lUnestones. Soils derived chieflj^ from 

 Carboniferous Mountain Limestone, and also Oolitic and Lias. The 

 woods are dominated by Ash {Fvaxinus excelsior), Merciirialis peren- 

 nis and Allinni iirsimiin being characteristic social plants of the 

 undergrowth. On steep slopes with loose soil, an open copse of 

 dwarfed Ash, Eider {Sambucus) and Yew (Taxus) occurs. Open 

 grassland covers large areas, and in places the author has found a 

 "Limestone Heath" with CaUiina, Erica cinerea, and other heath 

 plants mingled with Helianthemiim chamaecistus and other plants 

 usually regarded as typical of limestone soils. The succession of the 

 limestone plant associations is given thus: 



Ash wood 

 A 



Limestone cliffs- 

 Limestone screes- 



> 



Ash copse 



A 



I 

 Limestone heath 



A 



Natural pasture. 



C. Vegetation of deep niarls and clays. These soils are derived 

 from the Keuper, the Oxford Clay (Lias), and other strata. The 

 Oak-Hazelwood is regarded as characteristic, Oak being the dominant 

 and Hazel [Corylus) an abundant sub-dominant; in forestr}' these 

 woods are treated as Hazel coppice which is cut every few years. 



The distinction between Oak, Ash, and Oak-Hazel woods is 

 worked out in considerable detail, for which the memoir itself must 

 be consulted. 



The map (1 : 126720 or 2 miles to one inch) shows the distribution 

 of the principal Clements of the present Vegetation over an area ot 

 1300 Square miles. The following are indicated by colours and Sym- 

 bols: sand-dunes, salt-marsh and rocks of the coast; woods of Oak, 

 Ash, Oak-hazel, Birch, and Conifers; grassland, Calluna moor, and 

 heaths; and three colours for cultivated land. 



The plant associations described are exemplified by lists of 

 species; they are further illustrated by means of numerous excellent 

 photographs. W. G. Smith (Leeds). 



Pascher, A., Zur Kenntnis zweier mediterraner Arten der 

 Gattung Gagea. (Beihefte zum botanischen Centralblatt. XX. 

 Abt. 2. 1906. p. 76—107. Mit 2 Abb. u. 2 schematischen Zusam- 

 menstellungen im Text.) 



Die vorliegende Arbeit betrifft zwei mediterrane Arten der Gat- 

 tung Gagea, welche bisher beständig verwechselt und verkannt 

 wurden und bezüglich deren sich sogar in der neueren und neuesten 

 Literatur unrichtige und verwirrende Angaben finden. Es handelt 

 sich um G. foliosa R. Seh. und G. pedunctdaris Pasch. 



Anknüpfend an eine kurze Besprechung der zu klärenden Ver- 

 hältnisse enthält der erste Teil der Arbeit eine genaue und ausführ- 

 liche kritische Besprechung der beiden genannten Arten, nämlich 

 zunächst eine Wiedergabe der Presl'schen Originalbeschreibung 

 unter Beifügung von Abbildungen der Originalexemplare, daran 



