Wavy st. john’s-wort (Hypericum undulatum, Enum. Pl.: 810 (1809))

Family: Hypericaceae

Author: Schousb. ex Willd.

Bibliography: Enum. Pl.: 810 (1809)

Year: 1809

Status: accepted

Rank: species

Genus: Hypericum

Vegetable: False

Observations: Macaronesia, W. & SW. Europe, NW. Africa

Description

Wavy st. john’s-wort, scientifically known as Hypericum undulatum, is a remarkable species belonging to the Hypericaceae family. This appealing and resilient plant traces its roots back to various regions including Macaronesia, Western and Southwestern Europe, and Northwestern Africa, showcasing a broad geographical range indicative of its adaptability and ecological value.

Characterized by its distinctive wavy-edged leaves, Hypericum undulatum stands out along the diverse landscapes it inhabits. The plant thrives in an array of habitats, from sunny meadows to partially shaded forest edges, demonstrating a notable versatility. Its bright yellow flowers, typical of the Hypericum genus, bloom in a striking display that not only enhances the surrounding natural beauty but also plays a crucial role in supporting pollinators.

The first formal documentation of Wavy st. john’s-wort dates back to 1809, attributed to the work of Schousboe and later expanded by Willdenow, as noted in the “Enumeratio Plantarum.” This botanical landmark underscores the long-standing recognition and scientific interest in this species.

Hypericum undulatum is more than just an ornamental plant; it holds value in various ecological and conservation contexts. Its presence within the ecosystems of Europe and Africa contributes to biodiversity, benefiting numerous species and fostering ecological balance. Furthermore, its resilience makes it a fascinating subject for further botanical study and conservation efforts.

In summary, Hypericum undulatum’s wavy leaves and vibrant flowers not only enrich the visual tapestry of its native regions but also offer essential ecological benefits. Its historical documentation and widespread distribution highlight its importance and potential as a subject for ongoing research and conservation planning.

Common Names

Eng: wavy st. john’s-wort, wavy st john’s-wort
Cym: eurinllys tonnog, eurinllys tonnog-ddail
En: Wavy St. John’s-wort, Flax-leaved St John’s-wort, Wavy St John’s-wort, Wavy Saint-John’s-wort
Fr: Millepertuis ondulé
Pt: Hipericão-bravo
Cy: Eurinllys Tonnog, Eurinllys Tonnog-Ddail
: Wavy st. john’s-wort

Synonyms

• Hypericum tetrapterum var. undulatum ((Schousb. ex Willd.) S.Coult.)
• Hypericum tetrapterum subsp. undulatum ((Schousb. ex Willd.) P.Silva)
• Hypericum acutum subsp. undulatum ((Schousb. ex Willd.) Rouy & Foucaud)
• Hypericum acutum subsp. baeticum ((Boiss.) Cout.)
• Hypericum quadrangulum subsp. undulatum ((Schousb. ex Willd.) Rivas Goday & Borja)
• Hypericum maculatum subsp. undulatum ((Schousb. ex Willd.) P.Fourn.)
• Hypericum tetrapterum var. baeticum ((Boiss.) Cout.)
• Hypericum acutum var. undulatum ((Schousb. ex Willd.) Pau)
• Hypericum undulatum var. baeticum ((Boiss.) Lange)
• Hypericum acutum var. baeticum ((Boiss.) Samp.)
• Hypericum quadrangulum var. undulatum ((Schousb. ex Willd.) Choisy)
• Hypericum quadrangulum f. undulatum ((Schousb. ex Willd.) Borg)

Distribution

• Algeria (native)
• Azores (native)
• France (native)
• Great Britain (native)
• Ireland (native)
• Madeira (native)
• Morocco (native)
• Portugal (native)
• Spain (native)

Additional Images

Leaf

Taken Apr 30, 2022 by Daniel Bourget (cc-by-sa)

Taken Apr 30, 2022 by Daniel Bourget (cc-by-sa)

Taken Jun 25, 2022 by Paco Paños (cc-by-sa)

Taken Aug 16, 2022 by Andy Radnor (cc-by-sa)

Taken Jul 17, 2022 by Pérez Ana (cc-by-sa)

Flower

Taken Jul 6, 2022 by Stephany Kirch-Erstling (cc-by-sa)

Taken Jul 15, 2006 by Photoflora – Jean-Luc TASSET (©)

Taken Aug 27, 2022 by Francisco Cordoba (cc-by-sa)

Taken Jul 17, 2022 by Pérez Ana (cc-by-sa)

Taken Jul 17, 2022 by Pérez Ana (cc-by-sa)

Habit

Taken Jun 25, 2022 by Paco Paños (cc-by-sa)

Other

Taken Jul 15, 2006 by Photoflora – Benoit BOCK (©)

Taken Jul 15, 2006 by Photoflora – Benoit BOCK (©)

Taken Jul 15, 2006 by Photoflora – Benoit BOCK (©)

Sources

• WFO (No URL)
• IPNI (No URL)
• GBIF (https://www.gbif.org/species/7330383)
• POWO (http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:325121-2)
• PlantNet (https://identify.plantnet.org/species/the-plant-list/Hypericum undulatum Schousb. ex Willd.)

Specifications

Growth

Ph maximum: 5.5

Ph minimum: 5.0

Light: 8

Atmospheric humidity: 7

Soil nutriments: 4