The elements of botany for beginners and for schools . anding the tips of the tendrils into a flat disk, withau adhesive face. This is appKed to the supporting object, and it adheres firmly; then ashortening ofthe tendril andits branches by coiling brings up the growingshoot close to the support. This is an adapta-tion for climbing mural rocks or walls, or thetrunks of trees, to which ordinary tendrils areunable to cling. The Ivy and Poison Ivy attainthe same result by means of aerial rootlets (78). 100. Some tendrils are leaves or parts ofleaves, as those of the Pea (Pig. 35). The narture of
The elements of botany for beginners and for schools . anding the tips of the tendrils into a flat disk, withau adhesive face. This is appKed to the supporting object, and it adheres firmly; then ashortening ofthe tendril andits branches by coiling brings up the growingshoot close to the support. This is an adapta-tion for climbing mural rocks or walls, or thetrunks of trees, to which ordinary tendrils areunable to cling. The Ivy and Poison Ivy attainthe same result by means of aerial rootlets (78). 100. Some tendrils are leaves or parts ofleaves, as those of the Pea (Pig. 35). The narture of the tendril is known by its position. Atendril from the axil of a leaf, like that of Pas-sion-flowers (Pig. 92) is of course a stem, i. branch. So is one which terminates a stem,as in the Grape-Vine. 101. Spines or Thorns (Pig. 95, 96) arecommonly stunted and hardened branchesor tips of stems or branches, as are those ofHawthorn, Honey-Locust, etc. In the Pearand Sloe all gradations occur between spinesand spine-like (spinescent) branches. Spines.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
