Chiba University Matsudo/Kashiwa Campus Plant Database

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Details of Genus: Jeffersonia W.Bartram (1793)

ID: 590

Genus ja: タツタソウ

Genus en: Twin leaf

# spp.: 1 (from genus_families table) | 2 (from names table)

Accepted: Accepted

Family: Berberidaceae

Family ja: メギ

Infra familial classification:

Citation:
Data sourceKind of informationNote
Kew Gardens (2017) Plants of the world online (POWO). Accessed on 24 Feb 2026Scientific name & others Show this Data source
邑田・米倉 (2013) 維管束植物分類表Japanese common name Show this Data source

Distribution en: SE. Canada to N. Central & E. U.S.A.

Description en: Genus of 2 species of perennials which grow wild in damp woods and forests in N.E. Asia and North America. They have rounded to kidney-shaped, 2-lobed leaves, and solitary, cup-shaped flowers, with 5-8 petals, borne on long, slender stalks, in late spring or early summer. They are excellent plants for a shaded rock garden or peat bed.

Hardiness en: Fully hardy.

Cultivation en:

Propagation en: Sow seed in containers in an open frame as soon as ripe. Divide established plants in spring.

Pests en: Prone to slugs and snails, especially in spring.

Description ja:

The essential 1000 genera certification Genus Jeffersonia

2019 edition

Si Level
Family Berberidaceae

2003 edition

A Level
Family メギ
草本I・一年草/二年草/多年草
タツタソウ

1986 edition

A Level
Family メギ
草本植物
タツタソウ

Si level: the genus existed in 2003 or 1986 edition, but not listed in 2019 edition. (S level implied, 303 genera)

Comment: E. N.America, NE.Asia

Comment ja:

Type species:

Phylogenetic definition:

Update information: Created: 2007-12-06 12:51; Updated: 2026-03-03 21:57 by hkokubun@mac.com

Family:

System Accepted? Botanical name Japanese name Infra-familial classification # species
APG4 Accepted Berberidaceae メギ科 1 Show
PB2 Berberidaceae メギ科 Show
PB3 Berberidaceae メギ科 Show