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A characteristic useful for identification is that the young leaves emerge downy on the underside. The fall color is variable, from orange-yellow to pinkish or reddish. [5] [6] Flower details. It has perfect flowers that are 15–25 mm (5 ⁄ 8 –1 in) in diameter, with 5 petals, emerging during budbreak in early spring. The petals are white.
Rust leaf spot blight and apple powdery mildew can occur on Amelanchier canadensis. Insects that can burden the tree include the sawfly, leaf miners, borers, and scales. [17] Gymnosporangium infecting leaves will begin to produce yellow circular marks. Once the fungus has matured, it begins to sprout spore horns that can be either yellow or brown.
Amelanchier (/ æ m ə ˈ l æ n ʃ ɪər / am-ə-LAN-sheer), [1] also known as shadbush, shadwood or shadblow, serviceberry or sarvisberry (or just sarvis), juneberry, saskatoon, sugarplum, wild-plum [2] or chuckley pear, [3] is a genus of about 20 species of deciduous-leaved shrubs and small trees in the rose family .
Amelanchier laevis, the smooth shadbush, smooth serviceberry or Allegheny serviceberry, is a North American species of tree in the rose family Rosaceae, growing up to 9 metres (30 ft) tall. It is native to eastern Canada and the eastern United States , from Newfoundland west to Ontario , Minnesota , and Iowa , south as far as Georgia and Alabama .
The leaves are oval to nearly circular, 2–5 centimetres (3 ⁄ 4 –2 inches) long and 1–4.5 cm (1 ⁄ 2 – 1 + 3 ⁄ 4 in) broad, on a 0.5–2 cm (1 ⁄ 4 – 3 ⁄ 4 in) leaf stem, with margins toothed mostly above the middle. [5] As with all species in the genus Amelanchier, the flowers are white, [6] with five quite separate petals and ...
An albino corn plant with no chlorophyll (left) beside a normal plant (right) In botany, chlorosis is a condition in which leaves produce insufficient chlorophyll. As chlorophyll is responsible for the green color of leaves, chlorotic leaves are pale, yellow, or yellow-white.
Although yellowing leaves might indicate that peace lilies are stressed by their environment, peace lily leaves naturally turn yellow as they age. This type of leaf yellowing typically occurs on ...
Leaf scorch (also called leaf burn, leaf wilt, and sun scorch) is a browning of plant tissues, including leaf margins and tips, and yellowing or darkening of veins which may lead to eventual wilting and abscission of the leaf.