LABIAT.E 377 



plained above. The basal auricles of the cotyledons although 

 always present in the seed often become nearly obliterated 

 by growth after germination when they spread out, making 

 the base of the lamina more or less perfectly truncate. 

 This is nearly the case in S. triangularis which has indis- 

 tinctly penninerved cotyledons, but otherwise conforms to 

 the type. 



The cotyledons of Nepeta tuberosa vary slightly between 

 triangular and orbicular and are emarginate. The cotyledons 

 of Salvia hispanica are relatively broader, trinerved and finely 

 pubescent. Those of Nepeta nuda (fig. 594) and Salvia 

 argentea differ in being somewhat more rounded at the apex, 

 and more deeply cordate at the base. Those of the former 

 are notable for a cavity or depression at the base of the 

 lamina caused by the radicle and plumule while yet in the 

 seed. 



A second type having reniform emarginate cotyledons 

 occurs in Nepeta Glechoma. The cotyledons of Ocimum 

 Basilicum and Perilla nankinensis (fig. 587) are more or 

 less perfectly truncate at the base and emarginate. The 

 basal auricles present in the seed get obliterated by spread- 

 ing out after germination. A slight modification of this 

 type occurs in Salvia clandestina which has trinerved entire 

 cotyledons, truncate at the base. A third type is repre- 

 sented by Dracocephalum peltatum (fig. 592) which has 

 suborbicular emarginate cotyledons distinctly auricled at the 

 base. 



Elsholtzia cristata, Lallemantia iberica, and L. canescens 

 agree pretty closely with this type, as also does Monardella 

 Pringlei. The small size of the cotyledons and the length 

 of the petioles of the first pair of leaves, as compared with 

 those that follow, are noteworthy. The cotyledons of Eremo- 

 stachys laciniata are faintly trinerved and differ from the 

 type chiefly in being more elongated and roundly oblong. 



Acanthomintha ilicifolia (fig. 588) constitutes a fourth 

 type having small orbicular cotyledons, auricled at the base 

 but otherwise entire. 



The cotyledons of Salvia verbenacoides (fig. 591) differ 

 slightly from those of the above in being subtruncate at the 



