Koa
探検植物
Koa
acacia koa
The Koa (Acacia koa) is a magnificent, fast-growing canopy tree endemic to the Hawaiian Islands, representing one of the most culturally and ecologically significant plants in the archipelago. Renowned for its beautiful, highly figured wood which ranges from rich gold to deep chocolate brown, Koa was historically used by Native Hawaiians to build oceanic voyaging canoes, surfboards, and weapons. Today, it remains highly prized by woodworkers globally. As a keystone species of Hawaii's wet and mesic forests, the Koa tree provides crucial habitat for a vast array of endemic birds, insects, and understory plants. It plays an essential role in forest hydrology and nitrogen fixation, nurturing the delicate volcanic soils of its island home.
生息地: Found in wet to mesic montane forests across the major Hawaiian islands, typically at elevations between 300 and 2,000 meters.
外見
Koa trees are large, broad-canopied trees that can reach heights up to 30 meters. They are easily recognized by their distinctive crescent-shaped "leaves," which are actually modified leaf stems called phyllodes. True bipinnately compound leaves are present only on young seedlings or shaded lower branches. The bark is light gray, rough, and deeply fissured in older specimens. During the blooming season, the tree produces pale yellow, spherical flower heads resembling tiny powder puffs, which are followed by flat, brown seed pods measuring 7 to 15 centimeters long.
界Plantae門Tracheophyta綱Magnoliopsida目Fabales科Fabaceae属Acacia
カテゴリ
植物レア度
Common
危険度
1/5 · 非常に低い
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おもしろい事実
Adult Koa trees do not have true leaves; instead, they photosynthesize using crescent-shaped, flattened leaf stems called phyllodes.
Koa is the second most common tree in Hawaii's forests, preceded only by the Ohia Lehua.
The word 'Koa' means 'brave, bold, fearless, or warrior' in the Hawaiian language, reflecting the strength and resilience of its wood.
特殊能力
能力
Nitrogen-Fixing Symbiosis
Koa hosts Bradyrhizobium bacteria in its root nodules, converting atmospheric nitrogen into a usable form that enriches poor volcanic soils.
能力
Phyllode Metamorphosis
As it matures, Koa replaces its water-thirsty true leaves with drought-resistant, crescent-shaped phyllodes that reduce water loss.
能力
Wildfire Regeneration
Koa seeds possess a hard, durable coat that can remain dormant in the soil for decades, germinating rapidly after being scarified by forest fires.
サイズと詳細
- 長さ
- 1500-3000 cm
- 寿命
- 50-150 年
食性と食事
As a photoautotrophic plant, Koa generates its own energy through photosynthesis, utilizing sunlight, carbon dioxide, water, and soil nutrients.
主な食物
- Sunlight
- Carbon dioxide
- Water
- Soil minerals
生態系とのつながり
mutualism
I'iwi
Drepanis coccinea
Feeds on the nectar of Koa flowers and nests in its canopy.
eaten by
Koa Bug
Coleotichus blackburniae
A native iridescent insect that feeds on the seeds and pods of the Koa tree.
host plant
Akiapolaau
Hemignathus wilsoni
An endemic Hawaiian honeycreeper that uses its specialized beak to forage for insects under the bark of Koa trees.
特徴
このオブジェクトにはまだ特徴バッジが割り当てられていません。
別名
まだ別名はありません。
コレクション
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安全性
危険度
1/5 · 非常に低い
まだ特別な安全上の注意はありません。
よくある質問
Koaを見分けるには？
Koaを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。
Koaの長さは何ですか？
1500-3000 cm
Koaの寿命は何ですか？
50-150 年
Koaは何を食べますか？
As a photoautotrophic plant, Koa generates its own energy through photosynthesis, utilizing sunlight, carbon dioxide, water, and soil nutrients.
Koaは通常どこに生息していますか？
Found in wet to mesic montane forests across the major Hawaiian islands, typically at elevations between 300 and 2,000 meters.
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