36 



COMPANION TO TROPICAL READERS 



Expt. 24. Corms and Bulbs. Compare the under- 

 ground stem of the crocus or snowdrop (a corm) with 



Fig. 15. Section of Bulb 



L, Foliage leaves; In, inflorescence; s, fleshy scale leaves; B, brown 

 scale leaves ; St, stem ; R, roots. 



that of the onion (a bulb), cutting both across and 

 making drawings of the sections. 



STEMS AND SHOOTS II 



(See Tropical Readers, Book I, pp. 82-86.) 



Expt. 25. Tendrils. Collect shoots of the grape vine, 

 sweet cup, cerasse, chocho, and four other plants that 

 possess tendrils with which they climb. 



Expt. 26. Coiled Tendrils. Closely examine the ten- 

 dril of a chocho or grape vine, and observe that it has 

 a straight portion in the middle of the coiled part; this 

 prevents its kinking when drawn tight, and reduces the 

 chance of its being broken by strong winds. 



Expt. 27. Twining Plants (fig. 16). Observe how 

 the yam vine twines round its support. AVind a piece 

 of string spirally round a stick to represent the direction 



