GermiTiation and Growth of Species of Salvia. 361 



Perhaps the fairest comparison which may be made among 

 the species from the above data is that given by the 

 approximate areas of the laminae. As has been already 

 pointed out, the inclination of the cotyledons, one to another, 

 may vary very considerably at different times. Hence the 

 amount of spread from tip to tip gives but little information 

 as to the sizes attained by them. The specimens measured 

 have invariably been the largest among the batch of 

 seedhngs ; in a few cases the results of competition with the 

 other seedlings of the batch has been to produce cotyledons of 

 considerably different dimensions from the above. Such a 

 case was observed in S. Tenorii, where the petiole of one 

 individual was 8 mm., and the lamina 4x4 mm. ; whilst in 

 another the petiole was 4 mm., the lamina 7x5. Again, 

 in S. porphyrata the growth of the cotyledons was consider- 

 ably increased after the growth of the first pair of ordinary 

 leaves. Thus, whilst on the 58th day after germination, 

 the lamina is 6x6 mm. and the petiole 3 mm., on 

 the 110th day the dimensions of the lamina are 9 X 8 mm., 

 whilst the petiole has increased to 6 mm. In general it 

 has been attempted to give the dimensions of the largest 

 healthily-grown (and not " drawn ") seedlings. We may 

 consider in a more detailed manner such further observations 

 as we have made regarding the shape and texture of the 



