. Elementary botany . Botany. l62 DICOTYLEDONS underground by the contraction of the roots, and consequently the leaves are, in each year, pressed close to the surface of the soil. Inflorescence (fig. 253).—The part which is popularly spoken of as the " Dandelion-flower" is an inflorescence, and consists of many (100 to 200) flowers inserted close together on a dilated terminal part of the stem. This state- ment is easily proved by pulling out one of the flowers from the capitulum, and seeing that it consists of suc- cessive whorls of floral leaves. The inflor- escence-axis bears, im
. Elementary botany . Botany. l62 DICOTYLEDONS underground by the contraction of the roots, and consequently the leaves are, in each year, pressed close to the surface of the soil. Inflorescence (fig. 253).—The part which is popularly spoken of as the " Dandelion-flower" is an inflorescence, and consists of many (100 to 200) flowers inserted close together on a dilated terminal part of the stem. This state- ment is easily proved by pulling out one of the flowers from the capitulum, and seeing that it consists of suc- cessive whorls of floral leaves. The inflor- escence-axis bears, im- mediately beneath the insertion of the flowers, a number of bracts forming an involucre, which surrounds the collection of flowers. The dilated terminal part of the inflor- escence-axis is often termed the " recep- tacle "; but it must be remembered that this has no connection with the receptacle of a single flower. Within the general involucre the central bracts have been suppressed; and only the outermost series of flowers stand in the axils of bracts which form the green involucre. The capitulum (figs. 253, 254) of the Dande- Uon displays movements. It closes in the evening or in dull weather, and opens in the morning or in sunlight. In addition, the inflorescence-axis executes certain movements. Fig. 202.—Flower of Dandelion. Left-hand figure is a complete flower : right-hand figure is a vertical 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 Groom, Percy, 1865-1931. London : G. Bell
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1898
