22 ON THE ORGANS OF PLANTS. 



Some Fruits still bear the name of Carpels, when they 

 are not united into a Capsule, and yet are differerent 

 from an Achene, or Follicle. PI. II. 7 m. 7 AS. 



Now take your knife, and cut across each way 

 different kinds of Seed-vessels ; examine them through 

 the Lens, and you will be able to distinguish each 

 part, and, I hope, understand how the different names 

 are to be applied. 



I have now described every part of a Plant, except 

 the Spines, Prickles, Hairs, and Glands: so often 

 growing from Stems and Leaves. 



SPINES are short, rigid branches, very hard and 

 sharp-pointed. They are formed from the Stem, (of 

 woody-tissue) and cannot be easily broken off. PL 1. 7. 



PRICKLES, are thorns growing from the Bark, and 

 can be separated from it very easily. PL II. 13. p. 



HAIRS are much finer, and named according to 

 their size and quality BRISTLES, DOWN, <fee. 



GLANDS are minute vessels, which contain some 

 fluid. They often have the form of Hairs, but examine 

 them with a microscope, and you will find them to be 

 small tubes, with heads to them. The Stinging 

 Nettle (Urtica) has such Glands, which contain a 

 poisonous juice ; the effects of it, you have often 

 suffered from, I dare say. If only slightly brushed 



