• Photo of Cirsium muticum (Cirsium muticums)

Plant Profile: Cirsium muticum

Taxonomy: Cirsium muticum

Names

Marsh Thistle, Swamp Thistle

  • Photo of Cirsium muticum (Cirsium muticums)

Phonetic Spelling:SIR-see-um mu-tee-kum

Genus:Cirsium

Species:muticum

Family:Asteraceae

Swamp Thistle is a biennial plant indigenous to the region, producing basal leaves in its first year and developing a flowering stem in the second. It thrives in swamps, moist woodlands, and thickets, favoring sandy soil. Notably, this thistle has fewer spines compared to others in its family.

As a valuable nectar source, it attracts a variety of bees and butterflies, while its seeds are a favorite among birds.

Cirsium muticum Feature Summary

Cirsium muticum Image Gallery

Tags

#wildlife plant
#nectar plant
#specialized bees
#NC native
#pollinator plant
#bee friendly

Similar Plants

Cirsium muticum is often confused with:

Cirsium muticum Feature Summary

Attributes
Members of the genus Cirsium support the following specialized bees: Melissodes (Heliomelissodes) desponsus, Osmia (Helicosmia) chalybea and Osmia (Helicosmia) texana. Birds eat the seeds.
Biennial
Fruit
Small achenes with tufts of white hair.
Flowers
Rose-purple flower heads are a dense cluster of numerous disk florets up to 2.5 inches wide on a hollow flowering stem. The sticky bracts are not tipped with spines. Blooms late summer to fall.
Pink
Purple/Lavender
Leaves
Rosette of long-stalked, deeply incised leaves up to 16 inches long and 4 inches across. they are pinnately cut into broad prickly segments with webby hairs beneath.
Alternate
Rosulate
Elliptical
Ovate
Pinnatifid
Obovate
> 6 inches
3-6 inches
Stem
Green finely grooved stems
Hairy (pubescent)
Whole Plant Traits
Native Plant
Wildflower
Landscape
Butterflies
Pollinators
Specialized Bees

Cirsium muticum Attributes

Cirsium muticum: Country Or Region Of Origin

Canada to U.S.A

Cirsium muticum: Wildlife Value

Members of the genus Cirsium support the following specialized bees: Melissodes (Heliomelissodes) desponsus, Osmia (Helicosmia) chalybea and Osmia (Helicosmia) texana. Birds eat the seeds.

Cirsium muticum: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Cirsium muticum Fruit

Cirsium muticum: Fruit Description

Small achenes with tufts of white hair.

Cirsium muticum: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Cirsium muticum Flowers

Cirsium muticum: Flower Description

Rose-purple flower heads are a dense cluster of numerous disk florets up to 2.5 inches wide on a hollow flowering stem. The sticky bracts are not tipped with spines. Blooms late summer to fall.

Cirsium muticum: Flower Color

filter_vintage
Pink
filter_vintage
Purple/Lavender

Cirsium muticum: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Cirsium muticum: Flower Bloom Time

Winter
Spring
Summer
Fall

Cirsium muticum: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Cirsium muticum Leaves

Cirsium muticum: Leaf Description

Rosette of long-stalked, deeply incised leaves up to 16 inches long and 4 inches across. they are pinnately cut into broad prickly segments with webby hairs beneath.

Cirsium muticum: Leaf Color

spa
Green

Cirsium muticum: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Cirsium muticum: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Cirsium muticum: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Cirsium muticum: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Cirsium muticum: Hairs Present

No
Yes

Cirsium muticum: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Cirsium muticum: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Cirsium muticum Stem

Cirsium muticum: Stem Description

Green finely grooved stems

Cirsium muticum: Stem Color

grass
Green

Cirsium muticum: Stem Is Aromatic

No
Yes

Cirsium muticum: Stem Cross Section

Angular
Oval
Round
Square

Cirsium muticum: Stem Surface

Corky Ridges
Covered with a powdery bloom (glaucous)
Dull
Hairy (pubescent)
Polished
Smooth (glabrous)

Cirsium muticum Whole Plant Traits

Cirsium muticum: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Cirsium muticum Landscape

Cirsium muticum: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees