Spider Ikozakura

Article

December 6, 2021

Primula reinii var. Kitadakensis (Primula reinii var. Kitadakensis) is a perennial plant belonging to the genus Primula of the Primula family. Primula reinii P. reinii var. A variety whose classification is based on reinii. Also known as Kiyosato Kozakura.

Features

The rhizome in the basement is thin, and several leaves are bundled. The leaves have long petioles and are densely populated with long white vellus hairs. The leaf blades are circular with a diameter of 1.5-4 cm, the base is heart-shaped, and the edges are deeper than the basic species, Primula tosaensis, and split into 7-9 palms, with a few rough tips on the splinters. There are saw teeth. White vellus hair grows on the surface of the leaf, but later becomes almost hairless, and there are many vellus hairs on the veins on the back surface. The leaves are not fully developed during the flowering season. The flowering season is May. The flower stalk is 5-10 cm in height, with 1-3 flowers scattered at the tip and open vellus hair at the base. The bracts of the flower stalk are lanceolate. The calyx is 5-7 mm long, splits into 5 to the middle, and is hairless. The corolla is purple-red, the throat is pale orange-yellow, high cup-shaped, about 2 cm in diameter, the tip is split into 5 and wide open, and the tip of the split is split into 2 to about 1/3. The length of the corolla tube is longer than that of the calyx. There are 5 stamens and 1 pistil, and the lengths of the stamens and pistils vary depending on the strain. The fruits are capsules and slightly longer than the calyx.

Distribution and growing environment

Endemic to Japan. It is distributed in the Chichibu Mountains, Yatsugatake, the Southern Alps, and Mt. Fuji in Honshu, and grows on the moist rock walls of the alpine and subalpine zones.

Origin of the name

The Japanese name Kumoi Kozakura means "Kumoi Kozakura" and means a small primrose that grows in the highlands. The species name (species adjective) reinii is a dedication to the German geographer Johannes Justus Rein, and the variant name kitadakensis means "Kitadake". The type specimen collection site is Mt. Nokogiri in the Southern Alps.

Species conservation status evaluation, etc.

Vulnerable Species (VU) (Ministry of the Environment Red List) (2020, Ministry of the Environment)

Gallery

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Basic species and varieties

Primula reinii

Primula reinii Franch. Et Sav. (1878) var. Reinii --The basic taxonomic species of Primula reinii. Perennial. The flower stalk is 5-10 cm in height, vellus hair grows on both sides of the leaf, and the leaf blade is round to kidney-shaped, with a diameter of 1.5-4 cm and a diameter of 5-7 cm at the fruit. The leaves are shallower than the spider, and the leaves are split 7-9, and the tips of the splinters are split 3-5 into sharp splinters. The flowers are magenta to light red, the corolla is 1.8-2.5 cm in diameter, and the corolla tube is 8-10 mm long. It is endemic to Japan and is distributed around Mt. Fuji in Honshu, Hakone, Mt. Tanzawa, Mikurajima, and Kii Peninsula, and grows in rocky areas in the mountains. Vulnerable Species (VU) (Ministry of the Environment Red List) (2020, Ministry of the Environment) .

Myogikozakura

Primula reinii Franch. Et Sav. Var. Myogiensis H.Hara (1955) --A variety of Primula reinii. Also known as Primula tosaensis. Perennial. There are fewer cuts in the leaves than the basic species. The leaves are very shallow and the teeth are not very noticeable. The diameter of the leaves at the time of flowering is 3 cm, and the diameter at the time of fruit is 5 cm. In early spring, it blooms before the leaves are fully developed. The flowers are pink and about 2 cm in diameter. It is endemic to Japan and is distributed around Mt. Myogi in Gunma Prefecture and grows in rocky areas. In the Red List of the Ministry of the Environment and Gunma Prefecture, it is selected under the name of "Myogi Iwazakura". Critically Endangered IA (CR) (Ministry of the Environment Red List) (2020, Ministry of the Environment)

Chichibuiwazakura

Primula reinii Franch. Et Sav. Var. Rhodtricha (Nakai et F.Maek.) T.Yamaz. (1993) --A variant of Primula reinii. Perennial. The flower stalk is 7-12 cm in height, which is slightly larger than the Primula tosaensis. Dark red hair grows slightly densely on the petioles and the lower part of the flower stem. Vellus hair grows on both sides of the leaf.

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