52 



FIRST LESSONS WITH PLANTS 



bodies with enlargements at the top. These are 

 shown at 1 1, 4 4, in Fig. 45. The enlargements 

 are seen to have two parts, and 

 each part seems to have split along 

 its edge. If the pupil were to 

 rub one of these enlargements upon 

 a bit of black paper, he would 

 probably discover a yellow dust. 

 These slender bodies are the sta- 

 mens. They are plainly of two 

 parts, the stalk, or filament, and 

 the enlargement, or anther ; and 

 the anther contains the yellow pow- 

 der, or pollen, of which we have 

 spoken. 



63. There are two rows of 

 leaf -like parts surrounding the 

 pistil and stamens. These are the 

 floral envelopes, or, collectively, 

 the perianth. The inner row is 

 the colored or showy portion, or 

 corolla. It has four parts, and 

 these we may call the petals. It is suggestive 

 to note the similar forms of the petals and sta- 

 mens. Both have long stalks (technically called 

 claws in the petals) and .a more or less expan- 

 ded or enlarged portion at the top (the limb, in 

 the petals). 



FIG. 46. 



The seed-pod of the 

 mustard. 



