Isopyrum

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Genus of flowering plants

title: "Isopyrum" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["isopyrum", "ranunculaceae-genera", "botanical-taxa-named-by-carl-linnaeus", "taxa-described-in-1753"] description: "Genus of flowering plants" topic_path: "general/isopyrum" source: "https://en.wikipedia.org/wiki/Isopyrum" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of flowering plants ::

|image=Isopyrum_thalictroides.jpg |image_caption=Isopyrum thalictroides |taxon=Isopyrum |authority=L. |type_species=Isopyrum thalictroides |type_species_authority=L.

Isopyrum is a genus of flowering plants of the family Ranunculaceae native to Eurasia and North America. Isopyrum plants possess white flowers with five sepals and five petals.

The genus was first described in 1753 by the biologist Carl Linnaeus. In 1920, the genus Paraquilegia was segregated out from Isopyrum to contain plants that are more morphologically aligned with members of the genus Aquilegia (columbines).

Description

::figure[src="https://upload.wikimedia.org/wikipedia/commons/1/1d/Isopyrum_thalictroides_sl21.jpg" caption="Fruit and seeds of ''Isopyrum thalictroides''"] ::

Isopyrum is a genus of perennial herbs in the family Ranunculaceae. The smooth and glabrous stems stand erect. Leaves are biternate. The leaves attached to the base of the stem are pale green on the bottom and green on the top. Leaves attached to the stem have short petioles with white sheathes.

Flowers on Isopyrum plants have radial symmetry. Each flower possesses five sepals and five petals. Sepals are white and petaloid. The petals are substantially smaller than the sepals. Each flower also features yellow anthers and between 20 and 30 stamens. There are between one and five pistils (female sex organs) to a flower.

Isopyrum fruit are stored in follicles that appear in groups of one to five. Each bears numerous seeds. These seeds are smooth and have an ovoid to ellipsoid shape. The seeds can be varying shades of black.

Taxonomy

The genus Isopyrum was first described by the Swedish biologist Carl Linnaeus in 1753. Part of the pair's proposed resolution was creating Paraquilegia and expanding the genus Semiaquilegia.

Distribution

The Royal Botanic Gardens, Kew's Plants of the World Online (POWO), which recognizes four species, characterized Isopyrum as solely an Eurasian genus. POWO treats Isopyrum as native to Spain, France, and much of Eastern Europe. POWO also identifies that the genus was introduced to Denmark and has an extinct range in Switzerland.

According to the Flora of China, members of Isopyrum are present across Eurasia and in North America. , the Flora of China identified two species Isopyrum anemonoides and Isopyrum manshuricum as having native ranges which extended into China.

Species

The list may not be complete or up-to-date. Many of the species formerly placed in Isopyrum are now placed in other genera of the Ranunculaceae, especially Enemion and Dichocarpum. Accepted species include:

Synonyms include:

References

References

  1. (2001). "[[Flora of China (series)".
  2. (1920). "A Revision of ''Isopyrum'' (Ranunculaceae) and Its Nearer Allies". [[Bulletin of Miscellaneous Information]].
  3. Nold, Robert. (2003). "Columbines: ''Aquilegia'', ''Paraquilegia'', and ''Semiaquilegia''". Timber Press.
  4. "''Isopyrum'' L.".
  5. "Catalogue of Life - 2017 Annual Checklist : Taxonomic tree".
  6. "Catalogue of Life - 2017 Annual Checklist : Search all names".

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isopyrumranunculaceae-generabotanical-taxa-named-by-carl-linnaeustaxa-described-in-1753