. The botany of crop plants; a text and reference book. Botany, Economic. 232 BOTANY OF CROP PLANTS Roots.—The root system is fibrous and very shallow (Fig. 88). The roots arise from the reduced stem, forming a fibrous tuft. Steins.—With but few exceptions, species of the genus Allium bear bulbs. In chives {Allium schosnoprasum), the bulbs are very small (Fig. 88), and in Welsh onion (Allium fistulosum) and leek {Allium porrum), they are nearly always. Fig. 89.—Leek (Allium porrum). absent (Figs. 88 and 89). In the common onion {A Ilium cepa), they are large and well developed. Examination of
. The botany of crop plants; a text and reference book. Botany, Economic. 232 BOTANY OF CROP PLANTS Roots.—The root system is fibrous and very shallow (Fig. 88). The roots arise from the reduced stem, forming a fibrous tuft. Steins.—With but few exceptions, species of the genus Allium bear bulbs. In chives {Allium schosnoprasum), the bulbs are very small (Fig. 88), and in Welsh onion (Allium fistulosum) and leek {Allium porrum), they are nearly always. Fig. 89.—Leek (Allium porrum). absent (Figs. 88 and 89). In the common onion {A Ilium cepa), they are large and well developed. Examination of the mature bulb of the common onion shows it to be made up of the much thickened bases of leaves, attached to a compara- tively small, conical stem (Fig. 14). This is best seen in a median, longitudinal section. From a terminal bud on this small, underground stem, there is sent up a long hollow or solid, leafless stem (Fig. 90) (scape) bearing an inflorescence at the top, which in this case is an umbel. Lateral buds are. 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 Robbins, Wilfred William, 1884-1952. Philadelphia, P. Blakiston
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectbotanyeconomic
