Alnus trabeculosa
| Family |
| Betulaceae |
| Genus |
| Alnus |
| Species |
| trabeculosa |
| Category |
| Woody |
| Type |
| Tree (deciduous) |
| Height |
| 10 m |
| General Description |
| Reported as rare in Japan, this tree has been placed on the IUCN Red List as least concern. |
| Habitat |
| Mountain valleys and river banks at an altitude of 200-1,000 m. |
| Bark/Stem Description |
| Smooth, grey or brownish grey in colour. Dark greyish-brown, glabrous branches and branchlets. |
| Flower/Leaf Bud Description |
| 2 glabrous, ribbed scales. |
| Leaf Description |
| Obovate-oblong, oblanceolate-oblong or oblong, 6-13 lateral veins on each side, 6-16 x 2.5-7 cm. |
| Flower Description |
| Female inflorescences grouped 2-4 in a raceme, oblong and penduncle. |
| Fruit Description |
| Broadly ovate nutlet with delicate wings, 1/4 the width of the nutlet, produced July through August. |