. The botany of crop plants : a text and reference book. Botany, Economic. DRXJPACE^ 395 to produce spurs (Fig. 165). Flower buds are, as a rule, on these spurs, one spur bearing from 2 to 20 buds. The spur may terminate in a leaf bud. However, in most plums, true terminal buds are seldom formed. In such cases, if the last lateral bud is a branch bud, this continues the growth of the branch in a straight line. The line between the two seasons' growths is not as sharp, in this case, as when a terminal bud develops. If the last lateral bud is a flower bud, the twig usually dies back to the later
. The botany of crop plants : a text and reference book. Botany, Economic. DRXJPACE^ 395 to produce spurs (Fig. 165). Flower buds are, as a rule, on these spurs, one spur bearing from 2 to 20 buds. The spur may terminate in a leaf bud. However, in most plums, true terminal buds are seldom formed. In such cases, if the last lateral bud is a branch bud, this continues the growth of the branch in a straight line. The line between the two seasons' growths is not as sharp, in this case, as when a terminal bud develops. If the last lateral bud is a flower bud, the twig usually dies back to the lateral branch developed from the last branch bud. In all plums, the flower buds are lateral. Flower buds usually stand out at an angle of about 30°, while leaf buds are more appressed to the stem. Leaves.—The leaves of plums vary a great deal in size, form, color, surface, thickness, and margin. In some species, the serrations are tipped by glandular prickles. Stipules are present. The leaves are convolute in the bud (Fig. lOl). Inflorescence.—The flower buds of the plum, unlike those of the apple and pear, bear only flowers. They may break open before, simultaneously with, or after the leaf buds. The flowers are in fascicled umbels. The number of flowers in the bud varies from one to five, two and three being the most common numbers. Flowers.—The receptacle forms a hollow cup (Fig. 163).. Fig. 165.—Twig of Domestica plum (Prunus domestica). (After Paddock and Whipple.). 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's Son
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