. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. AERIAL STEMS 145. â ^- :â â â â â â ^â¢'â â '^- ,>^ 47. Aerial Stems. â We may classify aerial steins as to their general character or as to their internal structure. As to internal structure they fall into two great classes based on the arrangements of vascular bun- dles which have just been men- tioned. These will be considered in the section on the structure and growth of stems {Section 50). As to their general character, there are various ways in wh
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. AERIAL STEMS 145. â ^- :â â â â â â ^â¢'â â '^- ,>^ 47. Aerial Stems. â We may classify aerial steins as to their general character or as to their internal structure. As to internal structure they fall into two great classes based on the arrangements of vascular bun- dles which have just been men- tioned. These will be considered in the section on the structure and growth of stems {Section 50). As to their general character, there are various ways in which stems may be classified; as to position they may be classified as erect, prostrate, or climbing; as to length of life they may be classified as annual or perennial; as to hardness and strength they may be classified as woody or herbaceous. Herbaceous means having to do with herbs. Herbaceous stems are the stems of herbs; they are generally soft and easily broken. Though they have xylem, they are not woody in the ordinary sense of the term. Herbaceous stems are generally annual, though the plant to which they belong may be a perennial on account of its perennial un- derground parts. Woody stems are perennial. Fig. 48. â Cross section of the stem of an annual plant showing the arrangement of the vascular bundles in a cylinder which here appears as a ring. The center is occupied by pith. Outside the vascular bundles is the 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 Coulter, John G. (John Gaylord), b. 1876. New York, American Book Co
Size: 1816px × 1376px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
