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Forsythia are deciduous shrubs typically growing to a height of 1–3 m (3 ft 3 in – 9 ft 10 in) and, rarely, up to 6 m (20 ft) with rough grey-brown bark. The leaves are borne oppositely and are usually simple, though sometimes trifoliate with a basal pair of small leaflets; they range between 2 and 10 cm (0.79 and 3.94 in) in length and, rarely, up to 15 cm (5.9 in), with a margin that is ...
Forsythia suspensa is a deciduous shrub that grows up to 3 metres (9.8 feet) tall. Its flowers are golden-yellow and they bloom March to April. [2] Leaves are green in color, broadly-ovate, and simple. [2] It can be grown as a weeping shrub on stream banks and can be identified by its pale flowers. Garden cultivars can be found. It is a spring ...
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
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.
Symptoms of infection include a downward curling of the leaves, leaf tip dieback, stunting, necrosis of growing leaf tips, sunken 'chicken pox-like' spots on leaves (often with a surrounding halo), stem death and yellowing. [7] Since these symptoms are so generic, extreme caution must be taken when introducing new plants to your greenhouse.
The fungal pathogen Cristulariella depraedans is found in Europe and North America and mostly affects trees in the genus Acer.Trees affected in Germany and Britain are primarily the sycamore (A. pseudoplatanus) and the Norway maple (A. platanoides), while in North America the most affected are A. platanoides, the red maple (), the sugar maple (A. saccharum), the silver maple (A. saccharinum ...
Forsythia europaea, commonly known as Albanian forsythia or European forsythia, [2] [3] is a species of flowering plant in the olive family, with a native range from Montenegro to northern Albania. [4] It is the only species of Forsythia native to Europe; [2] prior to its discovery in Albania in 1897, it was thought that all Forsythia were ...
The opposite leaves turn yellowish or occasionally purplish in the autumn before falling. [3] The bright yellow flowers are produced on one- to two-year-old growth and may be solitary or in racemes from 2 to 6. [2]