ALBERT AND GABRIELLE HOWARD, 71 



Another dittereiice which is of use in distinguishing the 

 types is the angle at which the secondary veins arise ; this 

 varies from nearly 90' ( type XLI V ) to 30' ( type VIII) and is 

 constant for any one t^^pe. For cigar wrapper tobaccos the angle 

 of venation is of great importance. The form of the apex is 

 generally acute or acuminate, but every gradation is found 

 between the almost obtuse apex of type XXXV to the long 

 slender prolongation in tj'^pe XIX. A^ery few of the leaves are 

 quite smooth and flat. The margin may be entire or ma}'^ be 

 regularly and slightly undulate giving the leaves a "frilled" edge 

 ( type XXIV ) or may be irregularly and more deeply undulate. 

 Besides these sinuations of the marsin the whole leaf has often 

 deep, somewhat irregular undulations, especiall}' near the base 

 (type XIA^ ). The surface may be tlat or puckered to a varying 

 extent, and the lamina is often raised between the secondary 

 vems, giving the appearance of ridges or folds parallel to the 

 secondary nerves ( type XXXII ). The flatness or otherwise of 

 the leaf is an important point in determining the value of the 

 cured tobacco for certain purposes and on the whole the Indian 

 tobaccos are characterised by great unevenness of surface. Our 

 experience at Piisa tends to show that the amount of undulation 

 and puckering of the surface depends to some extent on the con- 

 ditions of cultivation. Further experiments on this point 

 are in progress. The colour and texture also show much greater 

 differences than in V. rustica; type LI has the thinnest leaf, while 

 types VI, VII and VIII are exceedingly thick and would 

 probably be useful only for the manufacture of snuff. The length 

 of the leaf varies from 25 cms. (type XLII) to 63 cms. (type VI), 

 the ratio of length to breadth varies from 15 (type III ) to 44 

 (type VIII). These measurements, taken on the 1909 crop, and 

 also the notes on the texture are only of relative value. 



Inflorescence. 

 The position of the inflorescence has already been discussed 

 in considering the general habit of the plant. No such marked 

 differences in the arrangement of the flowers is found as occurs 



