US JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XVI 1- 



Giving once more the mean monthly rainfall, humidity, cloud pro- 

 portion, and temperature, and adding, besides the flowering periods of 

 the woody plants (the herbaceous plants not being described in BrandiV 

 flora), we obtain the following table for a comparison between flowering 

 time arid climate : — 



Plate II shows the same graphically. 



A short examination of these curves leads to the same results, as did 

 our first graphic representation. The maximum of flowering times 

 coincides with the minima of humidity and rainfall, and with little above 

 the minimum of clouds during the first half of the year. The only 

 difference between the two regions with regard to the flowering season 

 is that, here, it is not the month of March which shows the maximum 

 of flowering times, but the month of April. This is, no doubt, due to 

 the high degree of humidity during January and February. Whilst the 

 curves of rainfall, clouds and humidity are ascending, tho curve of the 

 flowering times is descending. This is well shown especially in May, 

 June, and July. As soon as rainfall, clouds, and humidity are ap- 

 proaching their minimum in October, the number of flowering times 

 begins to increase. 



I now pass to the examination of an area which was included in the 

 foregoing, viz., the Upper Gangetic Plain and the adjacent Siwalik arid 

 sub-Himalayan tracts. It is worth being treated of independently, 

 because Duthie describes in his flora not only the wocdy but also the 

 herbaceous plants. There has appeared as yet only one volume, com- 

 prising the orders Ranunculaceze to Cornacese. " The area dealt with in 

 this flora," says the author, "amounts approximately to 196,000 square 

 miles. It is bounded on the north and north-east by a portion of ihe 

 main chain of the Western Himalaya, and on the east by Bengal. 

 On the south and south-west the boundary follows the watershed, 

 from which all the rivers west of the Son, and flowing into- the 



