Germination and Gh'owth of Species of Salvia. 365 



and second leaves than others which at the first appeared 

 the most vigorous by reason of their larger cotyledons. 



This was noticed both in S. Forskohlei, where the individuals 

 were crowded together, and in S. interrupta, where they were 

 grown quite free from one another. 



The first appearance of the ordinary leaves was as a 

 wrinkled semi-equitant pair, having a greatest length in some 

 species in a vertical direction, and in others (which 

 ultimately showed a more lowly habit) in a horizontal 

 direction. 



Although the leaves were thus produced in pairs, it was 

 almost always evident in early stages that one was grown 

 more favourably than the other, either by reason of its 

 position with relation to light, or from an actually earlier 

 development. Just as one leaf in a pair seemed, at the first, 

 to have the pre-eminence, so it was not long before the 

 much greater growth in size of the later pairs made itself 

 evident. A difference in size between the first and succeed- 

 ing pairs was less marked in species with a considerable 

 development of internodes. 



The shape and texture of these early leaves differed con- 

 siderably within the limits of single species, to facts under 

 which head we may now refer. 



Change of Shape ix Leaves of the sa^ie Species. 



In the detailed tables which we shall give of the dimen- 

 sions of leaves, as observed at different dates and when 

 mature, we shall be able to make rough comparisons as to 

 such changes in shape as are brought about by increase in 

 breadth in proportion to length, or vice versa; at present we 

 may notice a few of the more general changes in shape. 



In many species an increase in breadth towards the base 

 of the lamina in the later leaves was clearly marked. Thus, 

 in >S. ForskoMei and >S'. Tenorii the first and second leaves 

 which were produced were distinctly spathulate or obovate. 

 Subsequent leaves were more oblong, some were oblong- 

 lanceolate, due to the crowded manner in which the indi- 

 viduals were gi'own together, whilst others grown in a less 

 crowded position produced broader and less lanceolate 

 leaves. 



