Hazelnut family
| Hazelnut family | ||||||||||||
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Hornbeam ( Carpinus ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Coryloideae | ||||||||||||
| Koehne |
The hazelnut family (Coryloideae) are a subfamily of the birch family (Betulaceae). Sometimes they are also seen as an independent family Corylaceae.
The plant species of this subfamily occur in the temperate zones of the northern hemisphere .
description
They are deciduous trees or bushes . The alternate, spiral to two-line arranged stalked leaves are simple. The leaf margins are (mostly double) serrated or serrated. The stipules fall off early.
They are single sexed ( monoecious ). The male inflorescences are pendulous catkins. The pollination is carried on the wind ( anemophily ). The female inflorescences are short and erect, but differ in structure depending on the genus. The female inflorescences have foliage leaf-like bracts (bracts), however, who Betuloideae woody inflorescences. The inflorescence is absent in male flowers, in female flowers it is sepal-like. The male flowers consist of only four to eight fertile stamens . The female flowers are two carpels an under constant ovary grown, with two styluses. Large nut fruits are usually formed as fruits .
Systematics
In the subfamily of the hazelnut family (Coryloideae) there are four genera with a total of 45 to 50 species:
- Hornbeam ( Carpinus L. )
- Hazel ( Corylus L. )
- Hop beech ( Ostrya Scop. )
- Ostryopsis Decne. : With only three species exclusively native to China.
swell
- The Corylaceae family at DELTA by L. Watson & MJDallwitz. (engl.)
- Description of the subfamily in APWebsite (Engl.)
- Brief description in the Flora of North America. (engl.)