Floristik, Geographie, Systematik etc. 287 



ceae, Combretaceae, Myrtaceae, Lythrarieae, Onagrarieae , Passißoreae, 

 Cucurbitaceae , Begoniaceae, Ficoideae, XJmbelliferae, Araliaceae, Cor- 

 neae, Rubiaceae, Valerianae, Dipsaceae, Compositae, Goodenovieae , 

 Campamdaceae, Ericaceae, Plumbagineae, Primulaceae, Myrsineae , 

 Sapotaceae, Ebenaceae, Oleaceae, Apocynaceae, Asclepiadeae. These 

 include 412 species. The list is to be continued. 



M. G. Aikman (Kew). 



* 



Pott, Mrs R., A contribution to the knowledge of the 

 Transvaal Passißoraceae. (Ann. Transvaal Museum. V. 4. p. 

 234-237. 1917.) 



Descriptions of two new species, Tryphostemma arenophilum , 

 Warmbaths, and Adenia multiflora, Baviaanspoort, near Pretoria, 

 are given in Latin and in English. The enormous tuber of the 

 latter species grows partially above the ground between the rocks, 

 which it greatly resembles. It contains much sap, and is used bv 

 the Kamrs in case of thirst, and absence of water. 



M. G. Aikman (Kew 



Schonland, S., The Section Tuberosa ofthe Genus Crassula, 

 Linn. (With descriptions of two new species). (Ann. Bolus 

 Herb. II. 3. p. 87—94. 1917.) 



Under this section the sections Crenatolobatae and Tuberosae 

 are united. The section is described and a key to the species sup- 

 plied. Descriptions of the new species Crassula Albertiniae, Schön., 

 Onverwacht near Albertinia, and Cr. alcicornis, Schön., Olifant's 

 River Mountains are given. M. G. Aikman (Kew). 



Shaw, F. J. F., Orobanche as a Parasite in Bihar. (Mem. Dept. 

 Agric. India. Bot. Series. IX. N° 3. p. 107-130. 1917.) 



The seeds of Orobanche indica and O. cernua are present all 

 over the cultivated lands of Bihar. The former is a common and 

 destructive parasite of mustard, cabbages, turnips , etc. It occurs on 

 tobacco and tomato, but does not appear to be as serious a parasite 

 of solanaceous crops as is O. cernua. The universal distribution of 

 this parasite and the severity of the damage caused to a valuable 

 crop, such as tobacco, make any practical remedial measures an 

 important factor in Bihar agriculture. The experiments described 

 in this paper were devised to test the claim that sodium nitrate was 

 a specific against Orobanche. The results show that it cannot be 

 advocated as a eure. M. G. Aikman (Kew). 



Small, J., The Origin and Development ofthe Composi- 

 tae. III. (New Phyt. XVI. p. 253-276. 1917.) 



This section of the author's work on the Compositae deals with 

 the irritability of the pollen-presentation mechanism. The paper 

 opens witha detailed historical summary of our knowledge of irri- 

 tability in the gynaeceum and androecium in this and other 

 families. A table is given showing the type and degree of irrita- 

 bility in the stamens of a very large number of species of Compo- 

 sitae: the table is further elueidated by numerous notes. The phy- 

 siology of irritability and its phylogenetic significance in the case 

 of the Compositae are then dealt with. The author draws the inte- 



