Brook Thistle

Names and Synonyms

Common Names

• Brook Thistle

Scientific Names

Accepted name

Synonyms

• Cnicus semipectinatus
• Cirsium rivulare var. submonocephalum
• Cnicus autareticus
• Cnicus pontederae
• Cnicus rivularis
• Cnicus salisburgensis
• Cnicus seminudus
• Serratula salisburgensis
• Carduus erisithales
• Carduus pontederae
• Carduus rivularis
• Carduus salisburgensis
• Carduus semipectinatus
• Carduus tricephaloides
• Cirsium gracile
• Cirsium ledebourii
• Cirsium salisburgense
• Cirsium semipectinatum
• Cirsium tricephalodes
• Cirsium erisithales subsp. rivulare
• Cirsium tricephalum

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant, known as Cirsium rivulare, belongs to the kingdom Plantae and the phylum Streptophyta. Within the class Equisetopsida and subclass Magnoliidae, it is classified under the order Asterales. Finally, it is a member of the family Asteraceae and falls under the genus Cirsium.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is found across several distinct regions in the European continent. In Northern Europe, its range includes Great Britain and Sweden. Moving into Middle Europe, the species is also present in Germany. Furthermore, it can be located within the territories of Austria. Finally, its distribution extends through the Czechia-Slovakia region.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Cirsium rivulare is defined by its preference for consistently moist to saturated substrates, making it a characteristic component of riparian and wetland ecosystems. It is frequently found in habitats such as riverbanks and the margins of watercourses, where it thrives in the high-moisture environments provided by flowing or standing water. Beyond direct riverine settings, the species colonizes wet meadows and various forest types, including shaded woodlands and cut-over forest areas where light availability and soil moisture levels fluctuate. This ability to inhabit diverse yet hydric landscapes allows it to occupy niches ranging from open, sun-drenched grasslands to more sheltered, damp forest floors, provided the soil remains sufficiently damp to support its physiological requirements.

Habitat :

cut-over forest, forest, meadows: wet, rivers

Life history

The life history of Cirsium rivulare is characterized by its status as a perennial plant, allowing it to persist through multiple growing seasons. As a hemicryptophyte, its perennating buds are located at the soil surface, protected by leaf litter or the substrate during unfavorable conditions. This species exhibits a deciduous nature, shedding its foliage annually as it transitions through its seasonal cycles.

Deciduousness :

deciduous

Life form :

hemicryptophyte

Lifecycle :

perennial

Morphology

The morphology of Cirsium rivulare is characterized by its growth form as a non-woody herb and a forb. It functions as a self-supporting plant, lacking any climbing habits, and maintains an independent status as it is not a parasite. In terms of stature, the plant exhibits significant variability in height, typically ranging from a minimum of 0.3 m to a maximum of 1.2 m, with an average plant height of approximately 0.35 m.

Climber :

self-supporting

Growth form :

herb

Parasite :

independent

Plant height max:

1.2 m

Plant height mean:

0.35 m

Plant height min:

0.3 m

Woodiness :

non-woody

Physiology

The physiology of Cirsium rivulare is characterized by a specialized metabolic framework adapted to its typically moist, riparian habitats. Central to its energy acquisition is its photosynthetic pathway, which functions exclusively via the C3 mechanism. This process involves the direct fixation of atmospheric carbon dioxide by the enzyme Rubisco within the mesophyll cells, forming a three-carbon compound as the initial stable product of fixation. Because it utilizes the C3 pathway, the plant relies on efficient stomatal regulation to balance carbon uptake with transpiration, a physiological necessity given its preference for damp environments where water availability is generally sufficient to support the metabolic costs of photorespiration. This metabolic strategy allows the plant to thrive in temperate zones where cooler temperatures and consistent moisture optimize the efficiency of the Calvin cycle, supporting the robust vegetative growth and energetic demands required for its flowering cycles.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Cirsium rivulare is characterized by a specific seasonal flowering period that begins in June and concludes in July. The plant utilizes a biotic pollination syndrome, specifically relying on insects to facilitate the transfer of pollen. While it is capable of self-fertilization, its reproductive success is bolstered by these insect interactions. Following successful pollination, the plant produces seeds with a mean mass of 0.00237 g. These seeds are dispersed via an anemochorous syndrome, meaning they are primarily spread by the wind to colonize new areas.

Dispersal syndrome :

anemochorous

Flowering time :

Jun

Flowering time :

Jul

Pollination syndrome :

insect

Pollination syndrome :

biotic

Seed mass mean:

0.00237 g

Self fertilization :

present

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Cirsium rivulare has 1 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Tannins.

Tannins

1. Natural product research

Conditions

Cirsium rivulare has 3 reported investigations on conditions identified across 0 scientific publications and several other databases. The most consistently reported conditions include Bacillus subtilis, Pseudomonas aeruginosa, Staphylococcus aureus.

Bacillus subtilis

1. Natural product research

Pseudomonas aeruginosa

1. Natural product research

Staphylococcus aureus

1. Natural product research