Abstract
In order to spread the breeding area in the Orchidaceae, seed shapes and seed coat patterns are important to ride upon the winds. Here we report the shapes of the seeds of 61 Japanese orchid species. We compared the seed shape and breeding area, epiphytic on dry place, wet place, and terrestrial in grassland place, damp place, and in bright forest, and dark forest. As a result, In the case of orchid family grown in dark forest, the seed shape is tends to long and narrow. This shape may be evolved in order to adapt in the dark forest with weak wind growing with many other trees and grasses for expanding their breeding area.
Highlights
Orchid family plants produce tiny seeds that number in the hundreds of thousands
Orchid family plants grow in various places, epiphytic on dry place, wet place, and terrestrial in grassland place, damp place, and in bright forest, and dark forest
Seed shape evolution may be affected by the situation of the wind and other environmental conditions
Summary
Orchid family plants produce tiny seeds that number in the hundreds of thousands. Orchid family plants grow in various places, epiphytic on dry place, wet place, and terrestrial in grassland place, damp place, and in bright forest, and dark forest. It means that orchids grow in various environmental conditions.
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