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†Acer castorrivularis Wolfe & Tanai (Late Eocene, Beaver Creek Flora) [2] Acer caudatifolium Hayata; Acer chienii Hu & Cheng †Acer clarnoense Wolfe & Tanai (Late Eocene, John Day Formation) [2] Acer crataegifolium Siebold & Zucc. Acer davidii Franch. †Acer dettermani Wolfe & Tanai (Late Eocene - Early Oligocene, Meshik Volcanics) [2] Acer ...
Leaves retain their yellow border from the initial chlorosis. Apothecia survive in the fallen plant debris over winter, releasing spores when the temperature is warm again. [ 5 ] The infection of Tar Spot is localized to the chlorotic areas on the leaves and is mostly a cosmetic issue, rather than an economically detrimental disease.
Although some other maples (such as Acer griseum, Acer mandshuricum and the closely related A. cissifolium) have trifoliate leaves, only A. negundo regularly displays more than three leaflets. The leaflets are about 5–10 cm (2–4 in) long and 3–7 cm ( 1 + 1 ⁄ 4 – 2 + 3 ⁄ 4 in) wide with slightly serrate margins.
Field maple Acer campestre, in Ebsdorfergrund-Frauenberg, Hesse, Germany. Aceraceae were recognized as a family of flowering plants also called the maple family. They contain two to four genera, depending upon the circumscription, of some 120 species of trees and shrubs. A common characteristic is that the leaves are opposite, and the fruit a ...
Cristulariella depraedans, commonly known as gray mold spot, sycamore leaf spot or bull's eye spot, is a fungal pathogen that affects maple trees (genus Acer) and certain other woody and herbaceous species. In maples, the foliage becomes affected by small grey lesions which expand and coalesce, the leaves later wilting and falling from the tree ...
Several species, including Acer griseum (paperbark maple), Acer mandshuricum (Manchurian maple), Acer maximowiczianum (Nikko maple) and Acer triflorum (three-flowered maple), have trifoliate leaves. One species, Acer negundo (box-elder or Manitoba maple), has pinnately compound leaves that may be simply trifoliate or may have five, seven, or ...
Acer saccharinum, commonly known as silver maple, [3] creek maple, silverleaf maple, [3] soft maple, large maple, [3] water maple, [3] swamp maple, [3] or white maple, [3] is a species of maple native to the eastern and central United States and southeastern Canada.
Acer grandidentatum, commonly called bigtooth maple or western sugar maple, [2] [3] is a species of maple native to interior western North America. It occurs in scattered populations from western Montana to central Texas in the United States and south to Coahuila in northern Mexico .