Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 472
mber on the upper and lower sides (as dobuds), but nearly all the thorns on the upperside curved downward more and more as theygrew in length. This he regards as a note-worthy fact. In an extended article in ThePlant World he says: Very few shoots, in normal plants, turntheir points downward. None… … TWIG OF THORN-TREE.Shows most thorns pointing downward. very singular and interesting to find that thesebranches, so highly modified in form, . . . differfrom all the other branches of the tree in theirphysiology. AVhat, then, is the usefulness to the tree ofthe strong downward trend of these…
Children's literature
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