Characteristics
An evergreen herb. The roots are cylinder shaped but not enlarged. The leaves are 30-60 cm long and about 1 cm wide. They are curved. The flower arrangement is erect and branched. There are 3-15 flowers. The flowers are 9-11 cm long. They for a tube for about 1/3rd of their length. The flowers are yellow and have a scent. They open in the morning.
| Life form |
perennial
|
| Growth form |
herb
|
| Growth support |
free-standing
|
| Foliage retention |
evergreen
|
| Sexuality |
hermaphrodite
|
| Pollination |
-
|
| Spread |
-
|
| Mature width (meter) |
0.5
|
| Mature height (meter) |
0.5
|
| Root system |
-
|
| Rooting depth (meter) |
-
|
| Root diameter (meter) |
-
|
| Flower color |
|
| Blooming months |
| Jan | Feb | Mar | | Apr | May | Jun | | Jul | Aug | Sep | | Oct | Nov | Dec |
|
| Fruit color |
-
|
| Fruiting months |
-
|
| Nitrogen fixer |
-
|
| Photosynthetic pathway |
-
|
Environment
Mountains in central and southern Japan.
| Light |
|
| Soil humidity |
|
| Soil texture |
|
| Soil acidity |
|
| Soil nutriment |
-
|
| Hardiness (USDA) |
|
Usage
The mature flower buds are gathered just as they open and scalded in boiling water, or steamed then sun dried.
Cultivation
Can be grown by divisions or seedlings. Seeds needs stratification.
| Mode |
divisions
seedlings
|
| Germination duration (days) |
21 - 49
|
| Germination temperacture (C°) |
15 - 21
|
| Germination luminosity |
-
|
| Germination treatment |
stratification
|
| Minimum temperature (C°) |
-35
|
| Optimum temperature (C°) |
-
|
| Size |
-
|
| Vigor |
-
|
| Productivity |
-
|
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