Rhodotypos

Rhodotypos scandens

Rhodotypos scandens is the only species of the plant genus Rhodotypos and belongs to the subfamily of Spiraeoideae within the rose family ( Rosaceae ). It occurs in China, Japan ( only western Honshu ) and Korea. It is used as an ornamental plant and called White Rosenkerrie, Schneekerrie, Climbing Scheinkerrie, Scheinkerrie Cayman or shrub.

• 4.1 Notes and references

Description

Appearance and leaf

Rhodotypos scandens is achieved meters a deciduous shrub, the plant height usually about 0.5 to 2 (rarely up to 3). The bark of the branches is bare and brown at first green and later. The buds have imbricate overlapping bud scales.

The oppositely arranged leaves are continually divided into petiole and leaf blade. The relatively short with a length of 2 to 5 mm petiole is soft hairy. The simple leaf blade is ovate with rounded up almost heart-shaped Spreitenbasis and sharpened upper end at a length of 4 to 11 cm and a width of 3 to 6 cm. The leaf margin is sharply doubly serrate. The lower leaf surface is initially silky hairy, hairy later sparse soft. The upper leaf surface is initially soft hairy and glabrous later. The early- sloping, free stipules are linear, membranous and soft hairs.

Inflorescence and flower

The flowering period extends from April to May At the tips of the branches, the flowers are individually. The hermaphrodite, radiärsymmetrische, fourfold flower has a double perianth ( perianth ) has a diameter of 3 to 5 cm. The flower cup ( hypanthium ) is cup-shaped and flat. Four elongated side sepals are between the sepals and are 1/5 to 1/4 as long as the latter. The four deciduous leaf-like sepals are in two pairs that overlap each other like roof tiles and ovate -elliptic sparsely hairy silky with a pointed top and the bottom. The petals are opposite the sepals and are 1/4 to 1/3 as long as the latter. The four free white petals are short nailed and obovate. The many stamens are in several rows. The flower cup is crowned with a large, thick disc, which is divided into four lobes that cover the Früchtblätter during anthesis. There are usually four upper permanent carpels present, each containing only two hanging ovules, of which one dies. The most four terminal and thin pen each terminating in a capitate pen and protrude beyond the petals.

Fruit and seeds

There are one to four fruits together. The brownish- black when ripe are at a length of about 8 mm wrong ellipsoid. Since the smooth pericarp is dry is it in the fruit to a Nuculanium, which is very similar to the stone fruits. The fruits ripen in China from June to September. Each fruit contains just a wrong - egg-shaped seeds.

Chromosome number

The basic chromosome number is x = 9, there is a diploidy ago, so 2n = 18.

System

The first publication of this kind took place in 1794 under the name ( basionym ) Corchorus scandens by Carl Peter Thunberg in Transactions of the Linnean Society of London, 2, pp. 335-336. The genus Rhodotypos 1841 by Philipp Franz von Siebold and Joseph Gerhard Zuccarini in Flora Japonica, 1, p 187, Plate 99, Figure 1, with the type species Rhodotypos Siebold & Zucc kerrioides. positioned. The name Rhodotypos scandens was published in 1913 by Makino Tomitaro in Botanical Magazine, Volume 27, Issue 318, p 126. Other synonyms for Rhodotypos scandens ( Thunb. ) Makino are: Kerria tetrapetala Siebold and Rhodotypos tetrapetala ( Siebold ) Makino Rhodotypos scandens is the only species of the genus Rhodotypos from the tribe Kerriae in the subfamily Spiraeoideae within the family Rosaceae.

Use

Rhodotypos scandens is used as an ornamental plant. It is hardy in temperate latitudes and gededeiht on sunny to partially shaded locations.

It is reported from use in traditional Chinese medicine.

Swell

• Chaoluan Li (Li Chao- luang ), Hiroshi Ikeda & Hideaki Ohba: Rhodotypos genus and species Rhodotypos scandens, pp. 192 - text the same online as printed work, In: Wu Zheng -yi, Peter H. Raven (eds.): Flora of China, Volume 9 - Pittosporaceae through Connaraceae, Science Press and Missouri Botanical Garden Press, Beijing and Saint Louis, May 1 2003 ISBN 1-930723-14-8 (Section Description, distribution and systematics).