THE SPRING FLORA 179 



ROSACEAE 

 STRAWBERRY (FRAG ARIA] OR POTENTILLA (CINQUEFOIL) 



1. Habit. 



a. Observe the general habit of the strawberry, noting 

 the relations of stem, leaves, and roots. 



2. Reproduction. 



a. Vegetative reproduction. Study the origin of the run- 

 ners, and their general morphology. Do they origi- 

 nate, like stems, from the axils of the leaves? Have 

 they nodes, internodes, and leaves? How do the 

 runners produce offspring ? 



b. Construct a diagram to illustrate the origin, morphol- 



ogy, and mode of reproduction by runners. 



c. The flower. Study the floral plan and structure of 



the flower. Be able to construct a ground plan of 

 a flower. 



d. Pollination features. Read the text on Fragaria and 



consult the figures. Determine the method of polli- 

 nation in the species or variety that you are study- 

 ing. Construct figures to illustrate the method of 

 pollination observed. 



e. Flower and fruit. 



(1) To what class of fruits does the strawberry belong ? 



What are its parts and how are they related to 

 the similar parts of the flower ? Bisect a fruit 

 lengthwise and compare it with a similar section 

 of the flower. Be able to name corresponding 

 parts in the flower and the fruit. 



(2) Drawings. Draw a median vertical section of the 



flower and fruit of the strawberry and name 

 the corresponding parts. 



