Everything about Maple totally explained
Acer (
maple) is a
genus of
trees or
shrubs. They are variously classified in a family of their own, the
Aceraceae, or (together with the
Hippocastanaceae) included in the family
Sapindaceae. Modern classifications, including the
Angiosperm Phylogeny Group classification, favour inclusion in Sapindaceae. There are approximately 125
species, most of which are native to
Asia, but several species also occur in
Europe, northern
Africa, and
North America.
The word
Acer is derived from a
Latin word meaning "sharp" (referring to the characteristic points on the leaves) and was first applied to the genus by the
French botanist
Joseph Pitton de Tournefort in 1700. The
type species of the genus is
Acer pseudoplatanus (Sycamore Maple).
Morphology
Maples are mostly
trees growing to 10-40 meters (30-130 ft) in height. Others are
shrubs less than 10 metres tall with a number of small
trunks originating at ground level. Most species are
deciduous, but a few in southern Asia and the
Mediterranean region are
evergreen. Most are shade-tolerant when young, and are often late-successional in ecology; many of the smaller species are usually understory trees growing under the canopies of other larger trees, while the larger species eventually become dominant canopy trees. Maple
root systems are typically dense and fibrous. A few species, notably
Acer cappadocicum, frequently produce
root sprouts, which can develop into
clonal colonies.
Maple flowers are green, yellow, orange or red. Though individually small, the effect of an entire tree in flower can be striking in several species. Some maples are an early spring source of
pollen and
nectar for
bees.
The distinctive
fruit are called
samaras or "maple keys". These
seeds occur in distinctive pairs each containing one seed enclosed in a "nutlet" attached to a flattened wing of fibrous, papery tissue. They are shaped to spin as they fall and to carry the seeds a considerable distance on the wind. Seed maturation is usually in a few weeks to six months after flowering, with seed dispersal shortly after maturity. Most species require
stratification in order to
germinate, and some seeds can remain dormant in the soil for several years before germinating.
Pests and diseases
The leaves are used as a food plant for the
larvae of a number of
Lepidoptera species (see
List of Lepidoptera that feed on maples).
Aphids are also very common sap-feeders on maples. In horticultural applications a dimethoate spray will solve this.
Maples are affected by a number of
fungal diseases. Several are susceptible to Verticillium wilt caused by
Verticillium species, which can cause significant local mortality. Sooty bark disease, caused by
Cryptostroma species, can kill trees which are under stress due to
drought. Death of maples can rarely be caused by
Phytophthora root rot and
Ganoderma root decay. Maple leaves in late summer and autumn are commonly disfigured by "tar spot" caused by
Rhytisma species and
mildew caused by
Uncinula species, though these diseases don't usually have an adverse effect on the trees' long-term health.
Uses
Horticulture
Maples are planted as
ornamental trees by homeowners, businesses and municipalities.
Acer platanoides (Norway Maple) is especially popular as it's fast-growing and extremely cold-resistant, though it's also an
invasive species in some regions. Other maples, especially smaller or more unusual species, are popular as specimen trees.
Vermont,
Wisconsin and
West Virginia. The Red Maple was adopted by
Rhode Island as their official
state tree.
Image:Acer cappadocicum spring.jpg|Acer cappadocicum (Cappadocian Maple)
Image:Acer carpinifolium.jpg|Acer carpinifolium leaves
Image:Paperbark Maple Acer griseum Leaves Closeup 2856px.jpg|Acer griseum compound (trifoliate) leaf
Image:BigleafMaple 0304.jpg|Acer macrophyllum flowers and young leaves
Image:Acer laevigatum 3.jpg|Acer laevigatum leaves and fruit
Image:Acer sempervirens leaves.jpg|Acer sempervirens foliage
Image:Acer ginnala.jpg|Acer ginnala foliage
Image:redmaple.jpg|Acer rubrum trees in autumn
Image:TenryujiMomiji.jpg|Acer palmatum trees and bamboo in Japan
Image:Bi-colored Maple Tree.jpg|Acer grandidentatum in autumn colour
Image:Maple leaf Fcb981.JPG|Acer platanoides leaf
Image:Red maple leaf.jpg|Acer palmatum leaf in autumn
Further Information
Get more info on 'Maple'.
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