Floristik, Geographie, Systematik etc. 73 



already outlined by the author for Natal, with variants in other 

 regions of South Africa. Grassland is regarded as a final phase 

 in succession coordinate with Forest. The origin of Grass Veld 

 is not always the same, and five different ways are indicated, 

 four of them by invasion of recently eroded or deposited habitats, 

 one of them by invasion of Bush. Tree Veld is an extensive type 

 and presents several subdivisions, Acacia Veld, Protea Veld, Bush 

 Veld, etc. More desert in character are the Karroo and other 

 more or less arid T5^pes. The plant succession of the coast is also 

 briefly outlined. 



When the Vegetation as a whole is considered, several features 

 are prominent: the succession is generally from desert and open 

 edaphic types towards mesophytic, it is also unusual to find a 

 formation or association dominated by a Single species. The various 

 t5'^pes dealt with are summarised in a diagram. W. G. Smith. 



Brown, N. E., NoUnia Lodert'^. E. Brown. (Gard. Chron. LXII. 

 p. 66. With fig. Aug. 1917.) 



Describes a new species of Nolinia which has been growing in 

 the open in a garden in Sussex for 20 years. The plant was 

 obtained from Italy but is probably a native of Central America. 



E. M. Cotton. 



Brown, N. E., Mesembryanthemuni Elishae sp. nov. (Gard. Chron. 

 W 1561. p. 252. Nov. 25, 1916.) 



The new species belongs to the group Sphaeroidea and is allied 

 to M. biloburn and M. stylosmn, a füll description is given. 



E. M. Cotton. 



Chodat , R., S u r 1 e Digitalis piirpurea „Plante calcifuge". 

 (Univ. Geneve. Inst. Bot. Chodat. IXe ser. le fasc. p. 7—16. 1915.) 



Die Art meidet kalkhaltigen Boden, wohl wegen der alkalischen 

 Reaktion des letzteren. Verf. setzte Torfkulturen von 1— 5'^/o CaCOg, 

 einer Mischung von CaCOg und MgCOs und des schwerlöslichen 

 Dolomites bei. In den beiden ersten Versuchsreihen ergab sich 

 starkes Wachstum, steigend mit dem o/o-Gehalt, in der 3. Reihe 

 trat sogar bei Zusatz von 50/q nur eine geringe Wachstumsverzöge- 

 rung ein. Matouschek (Wien). 



Cortesi, F., Orchidacee nuove e critiche dei dintorni di 

 Nardo (Lecce). (Ann. Bot. XIII. p. 237-250. 1915.) 



Es werden als neu beschrieben: Orchis picta Lois. n. var. alba 

 (floribus albo-lutescentibus, labio trilobo: lobo medio lateralibus lon- 

 giore, immaculato, nervis viridibus bene manifestis; calcare arcuato 

 subascendente, clavato, apice truncato. In montibus calcareis prope 

 Tivoli Roma); X Ophrys Personei hybr. nov. ad interim (= O. ten- 

 thredinifera X O. lutea). — Orchis pseiidopicta (Freyn) F. Cort, = 

 O. picta X ^- papilionacea var. rtibra und Orchis alata Fleury z=z 

 O. laxißora X Morio. — Bei Ophrys Bertoloni Mor, unterscheidet 

 Verf. 2 Formen: tepalis roseis und tepalis albis. 



iVIatouschek (Wien). 



Farrow, E. P., On the Ecology of the Vegetation of Break- 



