| Section | Trigonocarpae Gordon | |
|---|---|---|
| Scientific Name | Type species | Viola rostrata Pursh Published in: Fl. Amer. sept. 1:174. (1813) |
| Variety | Viola rostrata auct. non Pursh var. japonica (W. Becker et H. Boiss.) Ohwi Nagahasi Sumire | |
| Form |
Viola rostrata (auct. non Pursh var. japonica) f. albiflora Y. Ueno Shirayuki Nagahasi Sumire Published in: J. Jap. Bot.,57: 30 (1982)
> Viola rostrata (auct. non Pursh var. japonica) f. alpina E.Hama Miyama Nagahasi Sumire
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|
| Synonym | ||
| Origin | rostrata : like beak of a bird | |
| Common names | 【English】long-spurred violet, 【French】violette a long eperon | |
| Stalk Form | A flower scape is extended from a stalk, and a flower blooms from each scape. | |
| Habitat | A snowiness zone. It grows wild in the dry fallen leaves forest of the low mountain. | |
| Distribution | Japan domestic | It is distributed over the Sea of Japan side from Hokkaido to Shimane. The small individuals are distributed in Pacific Ocean side. |
| Japan overseas | The mother species is distributed in the northeastern part of the North American continent (*However, in 2014, it was discovered as a different species). | |
| Others | Endemic to Japan. | |
| Flower | Shape | Middle size. The base of the side valve is hairless. |
| Color | From purple to light purple. | |
| Spur | A spur is very long as long as 10 to 30 mm, so identification is not difficult. Often white. | |
| Season | Rod-shaped. | |
| Stigma | Rod-shaped. | |
| Aromatic | There is a slight scent (not confirmed). | |
| Others | ||
| Leaf | Shape | A basal leaf is heart form. A tip sharpens lightly. |
| Color | The surface is glossy dark green. The back is a dark purplish red color. | |
| Others | ||
| Seed | Shape | |
| Color | ||
| Others | ||
| Characteristics of roots | ||
| Endangered Information | Hokkaido：Near-threatened, Ibaraki：ThreatenedⅠ, Tokyo：ThreatenedⅠ, Tokushima：ThreatenedⅠ | |
| Type Specimen | Aomori | |
| Chromosome Number | 2n=20 | |
| Reference Information | ||
| Others | Mother class is distributed over the northeast part of the North American Continent. Isolation distribution type. | |
