. Practical botany. Botany. Fig. 352. A, corn cockle, a weed of the Pink family, troublesome in grain- fields. The seeds are poisonous. One third natural size. B, cocklebur, a very troublesome weed of the Composite family, in rich land throughout a large part of the country. Two thirds natural size resistance to unfavorable influences. Some of the chief quali- fications wliich distinguish weeds are: (1) The power of vegetative reproduction. (2) Deep, tough roots, or relatively extensive development of the underground portion. (3) The power to produce many Please note that these images
. Practical botany. Botany. Fig. 352. A, corn cockle, a weed of the Pink family, troublesome in grain- fields. The seeds are poisonous. One third natural size. B, cocklebur, a very troublesome weed of the Composite family, in rich land throughout a large part of the country. Two thirds natural size resistance to unfavorable influences. Some of the chief quali- fications wliich distinguish weeds are: (1) The power of vegetative reproduction. (2) Deep, tough roots, or relatively extensive development of the underground portion. (3) The power to produce many Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917; Caldwell, Otis William, 1869- joint author. Boston, New York [etc. ] Ginn and company
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