 | An image should appear at this position in the text. To use the entire page scan as a placeholder, edit this page and replace "{{missing image}}" with "{{raw image|First course in biology (IA firstcourseinbio00bailrich).pdf/117}}". Otherwise, if you are able to provide the image then please do so. For guidance, see Wikisource:Image guidelines and Help:Adding images. |  |
Fig. 112.—Cow-*pea. Describe the leaves. For what is the plant used?
you know of parallel-veined leaves that have lobed or dentate margins?
60. What becomes of dead leaves? 61. Why is there
no grass or other undergrowth under pine and spruce trees?
62. Name several leaves that are useful for decorations. Why
are they useful? 63. What trees in your vicinity are most
esteemed as shade trees? What is the character of their foliage?
64. Why are the internodes so long in water-sprouts and suckers?
65. How do foliage characters in corn or sorghum differ when the
plants are grown in rows or broadcast? Why? 66. Why may
removal of half the plants increase the yield of cotton or sugar-*beets
or lettuce? 67. How do leaves curl when they wither?
Do different leaves behave differently in this respect? 68. What
kinds of leaves do you know to be eaten by insects? By cattle?
By horses? What kinds are used for human food? 69. How
would you describe the shape of leaf of peach? apple? elm?
hackberry? maple? sweet-gum? corn? wheat? cotton? hickory?
cowpea? strawberry? chrysanthemum? rose? carnation? 70. Are
any of the foregoing leaves compound? How do you describe the
shape of a compound leaf? 71. How many sizes of leaves do you
find on the bush or tree nearest the schoolroom door? 72. How
many colors or shades? 73. How many lengths of petioles?
74. Bring in all the shapes of leaves that you can find.
