Black Walnut
Juglans nigra · Juglandaceae · 흑호두나무
How to spot it
Pinnate compound leaves with many leaflets, thick dark bark, V-shaped leaf scars and chambered pith.
Look
- Leaves
- Each leaf has 15 to 23 leaflets with finely toothed margins.
- Flowers
- Male flowers are long greenish-yellow catkins from axillary buds on last year's twigs; female flowers sit 2 to 5 together at the tips of the current year's shoots.
- Fruit
- A brown to black nut sits inside a yellow-green, non-splitting fleshy husk. The outer husk stains skin and clothing strongly.
- Bark
- Thick brown bark with coarse, diamond-patterned furrows.
Where it grows
- Native to
- Central and eastern North America.
- Ecology
- Grows well on fertile lowlands, moist valleys and lower slopes; the nuts feed squirrels. Flowers are wind-pollinated.
Sources
- NC State Extension Gardener Plant Toolbox
- 국립수목원 국가표준재배식물목록(개정)
- 미주리주 보전부(Missouri Department of Conservation) 필드가이드
- 미 내무부 교육국(Department of the Interior, Bureau of Education) Bulletin 1919 No. 24 'Educational Work of the Boy Scouts' (Lorne W. Barclay, 1919, ERIC 소장 스캔본)
- 미주리주 국무장관실(Missouri Secretary of State) 'Missouri State Tree Nut'