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Powdery mildew is one of the easier plant diseases to identify, as the signs of the causal pathogen are quite distinctive. Infected plants display white powdery spots on the leaves and stems. [1] This mycelial layer may quickly spread to cover all of the leaves.
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. [5] The anamorph of tar spot is Melasmia acerina. [5] In late summer, conidiophores are formed in the mass of fungal tissue called the stroma. Stroma is located in the black lesions of the ...
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 ...
The following is a list of accepted species ordered alphabetically. Living species are from the Plants of the World Online database, [ 1 ] which is maintained by Kew Botanical Garden in London, with additions of extinct species from paleobotanical literature.
While both poison ivy and Acer negundo have compound leaves composed of three leaflets with ragged edges, Acer negundo exhibits an opposite branching pattern, as opposed to the alternating pattern of poison ivy. [16] Like poison ivy, Acer negundo is also a noted riparian species, and can often be found growing along riverbeds and in wet soils ...
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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 .
Acer spicatum is a deciduous shrub or small tree growing to 3–8 m (10–25 ft) tall, forming a spreading crown with a short trunk and slender branches. The leaves are opposite and simple, 6–10 cm (2 + 1 ⁄ 4 –4 in) long and wide, with 3 or 5 shallow broad lobes. They are coarsely and irregularly toothed with a light green hairless ...