226 CLASSIFICATION OF RICE. 



IV. Glume sliglitly convex, palea convex. (Plate 1. Fig. 4.) 



V. Glume sliglitly convex or straight, palea straight or slightly 

 concave. (Plate I, Fig. 5.) 



Among these five classes the first is by far the commonest. 

 In the fifth class the shape often appears twisted or ^ shaped. 



As a rough guide to the meanings of these terms a slightly 

 convex glume is four times as long as broad, convex three times, 

 very convex less than three times : a sUghtly convex palea is five 

 times as long as broad, convex four times, very convex less 

 than four times. 



Stigma. — Kikkawa(21) mentions that the colour of the stigma 

 can be used to distinguish the rice varieties. Three colours are 

 found in the stigma, viz., white, red and black. The white stigma 

 is found in the rices which have a green leaf sheath, the red in 

 association with the red leaf sheath and the black with the purple 

 leaf sheath. It is therefore of little use to bring in an additional 

 character which is associated in the Central Provinces rices with 

 another which can be more easily made out. 



Grain. 



Glutinous Rices. — So far as the present collection has gone, 

 no examples of glutinous rices have been found in the Central 

 Provinces. Glutinous rices have been experimentally grown on 

 the Raipur Farm, but with little success. They were also imported 

 during the shortage of the rice crop in 1907, but were not ap- 

 preciated even in a year of scarcity, so there seems little likelihood 

 of an opening for them in the Central Provinces. 



An analysis of a number of Central Provinces rices by Hooper 

 shows that the rices are in no way inferior to those grown in other 

 provinces. 



Colour. — According to the colour of the grain, the rices of the 

 Central Provinces fall into two groups. The first group contains 

 all the white rices, while the second contains the coloured rices. 

 By far the commonest in the Central Provinces are the white rices. 



