Overview

Distribution

Rhodotypos scandens (Thunb.) Makino:
Canada (North America)
Japan (Asia)
South Korea (Asia)
United States (North America)
China (Asia)
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National Distribution

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Comments

This species is used medicinally and cultivated for ornament.
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Description

Shrubs 0.5–2(3) m tall. Branchlets green when young, later brown, glabrous. Stipules pilose; petiole 2–5 mm, pilose; leaf blade 4–11 × 3–6 cm, abaxially sericeous when young, sparsely pilose on veins when old, adaxially pilose when young, glabrescent later, base rounded to subcordate, apex acuminate. Flowers 3–5 cm in diam. Sepals ovate-elliptic, sparsely sericeous distally, apex acute; epicalyx segments linear, 1/5–1/4 as long as sepals. Petals obovate, 1/4–1/3 as long as sepals. Drupes 1–4, brownish black, obliquely ellipsoid, ca. 8 mm. Fl. Apr–May, fr. Jun–Sep. 2n = 18.
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Diagnostic Description

Synonym

Corchorus scandens Thunberg, Trans. Linn. Soc. London 2: 335. 1794; Kerria tetrapetala Siebold; Rhodotypos kerrioides Siebold & Zuccarini; R. tetrapetala (Siebold) Makino.
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Ecology

Habitat

Habitat & Distribution

Forests on mountain slopes or in valleys; 100--800 m. Anhui, Gansu, Henan, Hubei, Jiangsu, Liaoning, Shaanxi, Shandong, Zhejiang [Japan, Korea].
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Rhodotypos scandens

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Species: 9
Species With Barcodes: 1

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Conservation

Conservation Status

NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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National NatureServe Conservation Status

United States

Rounded National Status Rank: NNA - Not Applicable

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Wikipedia

Rhodotypos

Rhodotypos scandens, the sole species of the genus Rhodotypos, is a deciduous shrub in the family Rosaceae, closely related to Kerria and included in that genus by some botanists. It is native to China, possibly also Japan.

It grows to 2-5 m tall, with (unusually for a species in the Rosaceae) opposite (not alternate) leaves, simple ovate-acute, 3-6 cm long and 2-4 cm broad with a serrated margin. The flowers are white, 3-4 cm diameter, and (also unusually) have four (not five) petals; flowering is from late spring to mid-summer. The fruit is a cluster of 1-4 shiny black drupes 5-8 mm diameter.

It does not have a widely used English name, most commonly being known by its genus name Rhodotypos, also occasionally as Jetbead or Jet-bead. It is an invasive species in some parts of eastern North America.

References and external links

  1. ^ Potter, D. et al.; Eriksson, T.; Evans, R. C.; Oh, S.; Smedmark, J. E. E.; Morgan, D. R.; Kerr, M.; Robertson, K. R. et al (2007). "Phylogeny and classification of Rosaceae". Plant Systematics and Evolution 266 (1–2): 5–43. doi:10.1007/s00606-007-0539-9.  [Referring to the subfamily by the name "Spiraeoideae"]
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