2692 



Journal of Applied Microscopy 



tuberous rhizome with contractile roots below. How deep was the rhizome 

 under ground .'' Describe how it descends into the earth. This plant is a 

 geophilous, herbaceous perennial. What are the advantages of the geophilous 

 habit ? 



2, Cut a cross section of the compound ovulary, mount, and draw under 

 low power, showing the cavities with ovules. 



3. Describe the condition of the flower according to the questions asked 

 under Sedum acre. Make a diagram of the flower. 



LX^XI. Cypripediiun Jdrsiitiim Mill. Large Yellow Lady's-slipper. 



Class, Monocotyledones. Order, Orchidales. Family, Orchidacese. 



This lady's-slipper grows in wet places and low woods, and blooms in May 

 and June. 



1. Sketch part of a plant, showing the flower and part of the leafy stem. 



KH'} 



d 



c 



Fig. l.j. — Diagram of flowers. 



2. Cut cross sections of the ovulary, mount, and draw. How many car- 

 pels ? Study the flower with the aid of the diagram. Fig. 15 d. 



3. Copy the diagram in the notes and write a general description of the 

 flower, noting especially that it is organized on the ^me plan as the Trillium 

 fl-ower, that some of the parts have disappeared, that it is epigynous and zygo- 

 morphic, that certain parts are united, and that it is highly specialized for insect 

 pollination. 



4. Why should this flower be placed higher than any of the monocotyls 

 previously studied ? Make a comparison of the flower of Sagittaria, Alisma, 

 Trillium and Cypripedium. 



