I02 MINUTE MARVELS OF NyVTURE 



gardens. The family of plants to which the dead- 

 nettle, mint, sage, thyme, and similar plants 



Pig. 65. Tlie triangular pollen-grains of (iodc/iti 



belong- are characterised by elliptic pollen-grains 

 with three, four, or si.x bands or ridges arranged 

 regularly along the length. Fig. 67 shows some 

 interesting grains, from a cultivated plant of this 



