VEGETATION OF RUNNING WATER 



stigma ; in the second type the style is of medium length, and the 

 stigma has one row of stamens below it and one above it. In the 

 third type of flower the style is long, and both rows of stamens 

 are below the stigma. This plant is therefore ^ 



said to have trimorphic flowers, and in this 

 particular may be compared with the Prim- 

 rose, which has dimorphic flowers. The 

 Purple Loosestrife must not be confused 

 with the Yellow Loosestrife, which is a 

 Lysimachia and has the Primrose type of 

 flower. 



The Hemp Agrimony is one of the simp- 

 lest of the Compositae ; each apparent flower 

 is a small flower-head consisting of four or 

 five pale reddish-purple florets contained by 

 an involucre of about ten bracts. Each of 

 the little flowers is in structure similar to a 

 single disc floret (the yellow florets) of the 

 Daisy, except that the two styles are in this 

 plant much longer. The florets contain 

 honey, which collects in the long narrow tube 

 of the corolla, where it can be obtained by 

 butterflies. The Meadow-sweet is a rosaceous 

 plant with creamy flowers massed together. 

 The fruits are not so well known ; they are 

 very minute, five or six together, as each 

 flower consists of five or six carpels which 

 are not joined to each other and therefore 

 form the same number of fruits ; each con- 

 tains one seed and opens to let it out in the 

 autumn, and is therefore a follicle, not an 

 achene, as the fruits of many of the Rosacese 

 are. The Golden Saxifrage (Chrysosplenium) 

 likes a wet habitat, and is found not only in 

 ditches by the side of streams, but on rocks 

 kept wet with the spray of waterfalls or 

 trickling rivulets. It differs from the true FIG I5 _ Purple Loose . 

 Saxifrage in having no petals. The stamens, strife (lyth. 



