Primula reinii

Koiwa sakura (primula reinii) is a perennial plant in the primrose family Primulaceae. This plant is similar to Iwazakura (Primula tosaensis), but one size smaller. In the spring, it produces short stems from the ground and sporadic inflorescences from the tips, which produce several flowers. The flowers are large compared to the height of the grass. The flowers are peach-colored and the central base is yellow. VU endangered II, with 5 deep lobes at the tip and 2 shallow petals. The major differences between small rock cherry (P. tosaensis) and rock cherry (P. treinii) are as follows
P. reinii is found in central Honshu (Kanto and Kii Peninsula), while P. tosaensis is found in western Japan (Kii Peninsula to Kyushu).
Flower diameter is 1.8 to 2.5 cm for small rock cherry (P. reinii) compared to 2.5 to 3 cm for rock cherry (P. tosaensis).
The leaf diameter is 3-7 cm for rock cherry (P. tosaensis) compared to 1.5-4 cm for small rock cherry (P. reinii).
Hairs on the back of the leaves are not present on rock cherry (P. tosaensis) but are present on small rock cherry (P. reinii).

Common name: Koiwa-zakura, Scientific name: Primula reinii, also known as Oominezakura , Height: 5-10 cm, Leaf shape: circular, Leaf diameter: 1.5-4 cm, Leaf margin: shallow, Leaf color: green, Flower color: pink, Flower diameter: 1.8-2.5 cm, Flowering period: May, Note: VU endangered II.

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