Peltoboykinia
| Peltoboykinia | ||||||||||||
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Tellima-like Peltoboykinia ( Peltoboykinia tellimoides ) |
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| Scientific name | ||||||||||||
| Peltoboykinia | ||||||||||||
| ( Engl. ) H. Hara |
Peltoboykinia is a plant genus in the family of the Saxifragaceae (Saxifragaceae). The only twospecies of Peltoboykinia are native to Japan and a small area in China .
description
Vegetative characteristics
Peltoboykinia species grow as perennial herbaceous plants . They form spread, short, relatively thick rhizomes as persistence organs. The stems usually have only a few alternate leaves that are much smaller than the basal leaves. Most of the leaves stand together in a basal leaf rosette and are divided into a petiole and a leaf blade. The smooth or hairy petioles are relatively long. The simple, large, pinnate leaf blades are peltate or circular to heart-shaped and are lobed . The leaf margin is serrated irregularly. The leaf surface is smooth to hairy. The stipules are membranous.
Generative characteristics
In a 40 to 80 cm large, zymous inflorescence, there are several flowers above small bracts on pedicels. The flowers are hermaphroditic and five-fold with double perianth . The flower cups (hypanthium) are fused with the ovary. There are five sepals . The five yellowish petals have weakly serrated edges. There are two circles with five stamens each. Two carpels are a half under continuous, two-chambered ovary grown. There are many ovules . The two styluses each end in a scar.
The capsule fruits contain many seeds. The small seeds are tuberculat.
The basic chromosome number is x = 11.
Systematics and distribution
Both species are native to Japan , one of which is also native to a small area in China .
By Adolf Engler 1930 in Engler & Prantl: The natural plant families , 2nd Edition, 18a, 120, the type Saxifraga tellimoides Maxim. in the genus Boykinia Nuttall in the new section Peltoboykinia Engl . In 1937 the Saxifragaceae specialist Hara Hiroshi in Botanical Magazine , 51, p. 251 upgraded this section with two species to a genus Peltoboykinia .
The genus Peltoboykinia contains only two species:
- Tellima-like Peltoboykinia ( Peltoboykinia tellimoides (Maxim.) H.Hara , Syn .: Saxifraga tellimoides Maxim. , Boykinia tellimoides (Maxim.) Engler ): It occurs in shady locations in ravines and the undergrowth of forests at altitudes of 1100 to 1900 meters in the Chinese Chong'an Xian in northern Fujian and Japan.
- Peltoboykinia watanabei H.Hara (Syn .: Boykinia watanabei (Yatabe) Makino , Peltoboykinia tellimoides var. Watanabei (Yatabe) H.Hara , Saxifraga watanabei Yatabe ): It occurs in mountain forests only on the two Japanese islands of Shikoku (in the two prefectures of Ehime and Tokushima) and Kyushu .
swell
- Pan Jintang, Douglas E. Soltis: Peltoboykinia in der Flora of China , Volume 8, 2001, p. 345: same text online and printed work.
- RJ Gornall, BA Bohm: A monograph of Boykinia, Peltoboykinia, Bolandra and Suksdorfia (Saxifragaceae). In: Botanical Journal of the Linnean Society , Volume 90, Issue 1, 1985, pp. 1-71.
