OBSEKVATIONAL LESSON XXVIII 



SPINES AND PRICKLES 



PREPARATIONS FOR WORK 



Give to each pupil short branches of hawthorn, false acacia and gorse, together 

 with a piece of wild rose stem and some holly leaves. 



DIRECTIONS TO THE PUPIL 



(1) Make a sketch of the thorn 

 of hawthorn, and write beneath it 

 the part of the plant that you 

 think it is. 



(2) Where do the spines grow 

 in gorse ? Indicate this on a 

 sketch of a shoot. Examine 

 the great spikes at the base of 

 the leaf in the false acacia. Make 

 a drawing., 



(3) Try whether the prickles of 

 the rose can be detached from the 



96 



FIGURE 211. A spine of Hawthorn. 



