Fine-tooth maple
| Fine-tooth maple | ||||||||||||
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Fine-toothed maple ( Acer argutum ), illustration |
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| Acer argutum | ||||||||||||
| Maxim. |
The Feinzähnige maple ( Acer argutum ), also Spitzblättriger maple called, is a plant from the genus of maple ( Acer ) in the family of soap tree plants (Sapindaceae). The fine-toothed maple is endemic to Japan, the Japanese name is Asa-no-ha kaede ( Japanese 麻 の 葉 楓 , German: " hemp- leaved maple").
description
As a tree, the fine-toothed maple reaches heights of growth of 5 to 10 meters, but often only grows shrubby and tends to be multi-stemmed. Young twigs have a reddish and hairy bark . Later the bark is dark gray-green.
The opposite leaves are usually five, less often seven-lobed; they are 5 to 10 centimeters wide and slightly shorter than wide. The lobes are egg-shaped, long pointed, sharply double-serrated, deep green on top, somewhat wrinkled, lighter on the underside and hairy white or gray on the nerves. The leaf base is broadly wedge-shaped to slightly rounded heart-shaped. The stem is three to ten inches long. In autumn the leaves turn yellow.
The fine-toothed maple is dioeciously separated sex ( diocesan ). The functionally unisexual flowers are yellow-green and glabrous. Seven to twelve male flowers stand together in thin, 4 to 5 centimeters long racemose inflorescences, which develop from side buds, occasionally with two basal leaves. The male flower contains four sepals , petals and stamens ; the gynoeceum is still rudimentary to be recognized. The female flowers stand in groups of seven to ten together, the racemose inflorescences also arise from side buds, always together with two leaves. The bracts of the female flowers are smaller than those of the male, in female flowers the stamens are very reduced or absent. The flowering period extends from April to May, with the flowers sprouting a little before the leaves.
The fissure fruits with horizontally spread wings disintegrate into two nuts about 2 centimeters long.
Occurrence
The home of the fine-toothed maple is Japan ; it occurs there on Honshu and Shikoku . The locations are in subalpine forests at altitudes between 800 and 1900 meters, often near streams. The soils usually have an acidic pH.
Systematics
The fine-toothed maple was first described by Karl Johann Maximowicz in 1867 . Acer argutum has given its name to the Arguta Rehder range within the Glabra Pax section . All related species such as Acer stachyophyllum are also dioeciously separated and come from East Asia.
literature
- Alan Mitchell: The forest and park trees of Europe: An identification book for dendrologists and nature lovers . Paul Parey, Hamburg and Berlin 1975, ISBN 3-490-05918-2 (translated and edited by Gerd Krüssmann).
- Helmut Pirc: Maples . Eugen Ulmer, Stuttgart (Hohenheim) 1994, ISBN 3-8001-6554-6 , pp. 107 .