. How ferns grow. Ferns; Growth (Plants). Fig. 2. tains one of the midvein's primary branches, including its ram- ifications, if any, and this branch, unless its development be arrested first, develops into the segment's midvein, bearing branches on both sides. This will be readily understood from figures 1-4. In figures 1-3 the partial subdivision of a primary segment,. Fig. 3. of a leaf with free pinnate venation, into secondary segments of the leaf, is shown. In Fig. 4, which represents a section of this primary segment, the ending of this subdivision and the begin- * In some foreign specie
. How ferns grow. Ferns; Growth (Plants). Fig. 2. tains one of the midvein's primary branches, including its ram- ifications, if any, and this branch, unless its development be arrested first, develops into the segment's midvein, bearing branches on both sides. This will be readily understood from figures 1-4. In figures 1-3 the partial subdivision of a primary segment,. Fig. 3. of a leaf with free pinnate venation, into secondary segments of the leaf, is shown. In Fig. 4, which represents a section of this primary segment, the ending of this subdivision and the begin- * In some foreign species the incisions, while occurring between the primary branches of the midveins in such a way that each segment formed by them contains one of these primary branches, occur at wider intervals than as above described, some primary branches without incisions between them intervening between the new 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 Slosson, Margaret. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
