94 THE JOUKNAL OF INDIAN BOTANY. 



of trees confined to the Malwa region are the only links with Indo-Malaya. A. 

 noteworthy feature is the abundance of Graminese and Cyperacese, which 

 together total 148 out of the 614 species. 



This work adds twenty-two truly wild and three alien species to the 

 Bombay flora, and establishes as genuine indigenous species ten which are 

 excluded in Cooke's work. Thus thirty-five species may be said to have been 

 added to the flora. In addition to this our knowledge of distribution of other 

 species within the Presidency has been materially advanced. 



Part II deals with the cecology of the district. The authors have accept- 

 ed Warming's analysis of the world's flora as a basis upon which to work, 

 and have considered that the great bulk of the area discussed belongs to his 

 class 10, Psilophytes. In Warming's use of the word this term is equivalent 

 to savannah. The woodland savannah consists of the Teak Tectona grandis. 

 Bael Aegle marmelos, Morinda citri folia, Odina wodier and other trees familiar to 

 botanists on the other, eastern, side of India, along with shrubs like Helicteres 

 isora, Carissa carundas, HularrJiena antidysenterica and Nyctanthes arbor-tristis- 

 The ' thorn-savannah ' in the same way consists largely of Zizyphus cenoplia, 

 Z. jujuba, Gymnosporia montana, Cassia auriculata, Capparls seiAaria and 

 others, all common enough on the dry hills of S. India. 



As regards other associations, the flora of open sheets of water such as 

 ' tanks,' and the slow moving rivers (Hydrophytes), and also that of their 

 banks (Helophytes) are both very similar to those of similar situations in 

 the Carnitic— Nymphcax lotus, Hydrilla verticillata, Trapa bispinosa, Jusstaa 

 repens and Nilalla sp. in the water : Herpestis Mouniera, Lippia nodiflora and 

 Marsilia quadrifoliata on their banks, to mention only a few. The dried mud 

 such as one finds in dried tanks also bears very similar vegetation to that 

 of Madras— the Babul Acacia arabica being abundant, and prostrate herbs 

 like Coldenia procumbens, Chrozophora plicata, Mollugo hirta and Polygonum 

 plebejum. The Mesophytic flora is, on account of the general dryness of the 

 country, distinctly poor; and only two examples are noted by the authors 

 where the ground was kept permanently moist, one by a tank, the other by a 

 spring. Nearly all the plants given are such as occur in similar places in 

 South India. 



The authors have added some notes on the associations of cultivated 

 lands, with a list of the common weeds and hedge-plants. In North Gujarat 

 the hedge is a much more important feature than in other parts of India and 

 harbours a definite and not uninteresting flora. Their list comprises the trees 

 and other woody plants, the climbers, and the small herbs : and they dis- 

 tinguish them according to the degree of commonness or rarity, and the clim- 

 bers according also to their habit of the roots or lower portions. 



This oecological part is, perhaps, the first instance of such work in India, 

 and the example will, it is to be hoped, be followed in other parts of this 

 country. 



Histology. 



Beer, R. and Arber, Agnes. On the occurrence of Multinucleate 

 Cells in Vegetative Tissues. Proc. Boy. Soc. B. 91 ; B. 635 p. 1. 

 (Aug. 1919) 



That multinucleate cells occur occasionally in plants has been known 

 ever since the days of Naegeli, but chiefly in connection with specialised 



