Living Beings
    Source-identified Pteridium aquilinum; Source-identified documentary image; see the original file for method and context. Framed for display
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    Pteridium aquilinum 153931398.jpg · Resized and converted to WebP for display. Source-identified documentary image; see the original file for method and context. Michel Langeveld · CC BY-SA 4.0

    Field guide · species

    Common Bracken

    Pteridium aquilinum Kuhn, 1879

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    The authority credits the formal scientific description of the name. A year records publication of that description.

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    ViridiplantaePolypodiopsidaPolypodialesDennstaedtiaceae

    Common Bracken is a fern whose familiar canopy of divided fronds is connected to a much larger underground system. Rhizomes persist between growing seasons and supply new fronds after damage. The name Pteridium aquilinum has also been used broadly for a complex of brackens. This profile distinguishes the present species concept from older accounts that combined plants now treated separately.

    Public research profile · final editorial review pending.

    Compare species
    Tree of lifeScientific lineage
    1. LifeLife
    2. DomainEukaryota
    3. KingdomViridiplantae
    4. PhylumStreptophyta
    5. ClassPolypodiopsida
    6. OrderPolypodiales
    7. FamilyDennstaedtiaceae
    8. GenusPteridium
    9. SpeciesPteridium aquilinum
    Advanced classification

    Complete source lineage, including intermediate ranks. The standard view uses Life and the eight principal ranks.

    1. cellular organisms cellular root
    2. Eukaryota domain
    3. Viridiplantae kingdom
    4. Streptophyta phylum
    5. Streptophytina subphylum
    6. Embryophyta clade
    7. Tracheophyta clade
    8. Euphyllophyta clade
    9. Polypodiopsida class
    10. Polypodiidae subclass
    11. Polypodiales order
    12. Dennstaedtiineae suborder
    13. Dennstaedtiaceae family
    14. Pteridium genus
    15. Pteridium aquilinum species
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    Structure and identification

    Mature fronds have a broad, roughly triangular outline and are divided repeatedly into smaller segments. Upright stalks arise from underground rhizomes. Spore-producing structures occur along the margins of fertile fronds; a single visible frond represents only part of the plant.

    Scientific source ↗

    Habitat and range

    Bracken occupies open woodland, clearings, rough grassland and disturbed sites. British ecological studies describe substantial frond cover where growing conditions and disturbance permit. Soil moisture, exposure and the below-ground system influence the structure of a stand.

    Scientific source ↗

    Nutrition and metabolism

    The green fronds obtain carbon through photosynthesis. Rhizomes store resources and supply emerging shoots, linking a new season's growth with reserves accumulated earlier. Bracken is not a flowering plant: its reproductive structures and seasonal resource stores have to be understood in the context of a fern life cycle.

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    Biological activity

    Growth is expressed as repeated emergence of fronds from the rhizome system. Rapid canopy development changes the light reaching the ground. Underground growth can survive the loss of visible fronds and supply renewed growth after disturbance.

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    Reproduction and life cycle

    Spores develop into a small, separate gametophyte generation. Fertilization starts the new sporophyte that becomes the large fern. Vegetative spread through rhizomes also extends established stands, independently of establishment from spores.

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    Geographic distribution

    Kew's current Plants of the World Online treatment gives the accepted species a native range in Macaronesia, northern and northeastern tropical Africa, the Arabian Peninsula, and Europe eastward to Siberia and Iran. This is narrower than older statements that bracken is nearly worldwide. Occurrences assigned to other Pteridium species are not silently combined here, and this summary is not a specimen-level distribution map.

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    Ecological role

    Dense fronds and accumulated litter affect the establishment of neighboring vegetation. The British flora account identifies stored rhizome resources, rapid spring growth and canopy development as important components of competitive ability. Their effects vary with environment and management.

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    Distinctive adaptations

    Protected underground reserves support recovery after above-ground disturbance. Rhizome growth and seasonal frond production allow a stand to persist even when individual fronds are short-lived. The connection between stored reserves and new shoots is central to this growth strategy.

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    Conservation

    No global threat category is assigned in this profile. Local management often concerns the persistence and dominance of stands. Range and management records must be matched to the species concept used in the regional flora.

    Scientific source 1 ↗ · Scientific source 2 ↗

    Evidence

    Sources

    Connected life

    No reviewed ecological connections in the collection yet.

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