192 Floristik, Geographie, Systematik etc. 



common primrose, Prhnula acaiiUs L. The authors show that this 

 is an error of citation and that the names in the Flora Anglica 

 occupy precisely the same ranks as in Linuaeus's Species Plan- 

 tarum ed. 1. 



For the convenience of those who have the List, the corrections 

 in name which have been rendered necessar}^ have been printed on 

 a Slip for incertion. A. B. Rendle. 



Stapf, O., Rediscovery of Statice arborea and Discovery of 

 a new allied species. (Annais of Botany Vol. XXII. p. 115. 1908.) 



Statice arborea which, in its typical form, was believed to have 

 become extinct, has been rediscovered in its 'locus classicus' on 

 some inaccessible rocks above Dante in Northwestern Tenerife, 

 whilst an allied species, S. Peresii, Stapf, was found near Masca 

 on the west coast of the Island. Of this a diagnosis is given. 



Author's notice. 



Stapf, O., The gum ammoniac of Morocco and the Cyrenaica. 

 (Bull. Mise. Inform. Roy. Bot. Card. Kew, N». 10. 1907. p. 37.5—388.) 



The gum ammoniac of Morocco, the history of which is given, 

 is the product of Ferula communis var. brevifolia, Mariz. This is 

 fairly common in some parts of Northwestern Morocco. The gum 

 which is usually obtained by tapping the root is chiefly used in 

 Morocco; small quantities are exported to Egypt and the Red 

 Sea. Another gum ammoniac, the chemical characters of which are 

 still unknown, is gathered in a similar way in the Cyrenaica from 

 Ferula marmarica, Aschers. & Taub., for local use. The author 

 points out that this species is evidently the Am moniakon of Diosco- 

 rides which very early in our era became superseded by the Persian 

 gum ammoniac, the product of Dorema ammoniactim , D. Don. The 

 paper also contains paragraphs on the origin of the vernacular na- 

 mes, the chemistry, export and botany of the drugs. 



Author's notice. 



Turner, F., Australian Grasses. (Bull. Mise. Inform. Roy. Bot. 

 Gard. Kew. 1908. NO. 1. p. 21—29.) 



The paper deals with native Australian grasses and their suita- 

 bihty for pastures under the dry conditions of the country, amongst 

 others; Kangaroo grass {Anthistiria ciliata)^ tall oat grass {A. ave- 

 nacea), several species of Eragrostis and the Mitchell grass {Astrebla 

 spp.) are of particular value. Owing to the fact that the seeds of 

 many species retain their germinating power for a long time these 

 grasses are enabled to tide over periods of drought. Some Space is 

 devoted to the question of the economic value of the pastures and 

 the Blue grass, {Andropogon sericeus), Kangaroo grass, Mitchell 

 grass, Star or Windmill grass [Chloris truncata), Sugar grass 

 {Pollinia fulva), and Wallaby {Danthonia seini annularis) are discus- 

 sed in detail. A. W. Hill. 



A-USgegeben : 18 A-ugustus IdOS. 



Verlag Ton Gustav Fischer in Jena. 

 Buchdruckerei A. W. S i j t h o ff in Leiden. 



