clustered bellflower

(Campanula glomerata)

Conservation Status
clustered bellflower
Photo by Luciearl
  IUCN Red List

not listed


NNA - Not applicable


not listed


Clustered bellflower is a showy exotic flower. It is native to Europe and Asia and is widely cultivated as an ornamental elsewhere. Although it rarely escapes cultivation, it has done so and is now naturalized across North America. It is uncommon in Minnesota. It is found in forests, woodlands, woodland edges, thickets, grasslands, and meadows, and on roadsides and trails. It grows in dry to moderately moist, often calcareous soil.

Clustered bellflower is a 12 to 28 (30 to 70 cm) tall, erect, perennial forb that rises on a single stem from a long, horizontal, underground stem (rhizome). The stem is erect and unbranched. It has many leaves and may be sparsely covered with white hairs or almost hairless.

Basal leaves are egg-shaped or egg lance-shaped, 2¼ to 6 (6 to 15 cm) long, ¾ to 2¾ (2 to 7 cm) wide. They are on long leaf stalks (petioles). The blades are heart-shaped at the base and pointed at the tip with straight sides along the tip (acute). The margins are covered with minute, sharp, forward-pointing teeth. The upper and lower surfaces may be sparsely covered with white hairs or almost hairless. Basal leaves are usually wilted by flowering time.

Stem leaves are alternate, 1½ to 5 (4 to 13 cm) long, and to 1 (1.5 to 3.5 cm) wide. Lower leaves are on long petioles, upper leaves are stalkless. The leaf blades are oval and broadest in the middle (elliptic), broadest at the base (egg-shaped), or egg-shaped with straight sides (egg lance-shaped). The base of the blade may be straight across (truncate), wedge-shaped, or rounded. The tip of the blade is pointed with either straight or concave sides along the tip. They are otherwise similar to basal leaves.

The inflorescence is a solitary, dense, head-like cluster of several flowers at the end of the stem. Sometimes there are also smaller, stalkless clusters in the uppermost leaf axils.

Individual flowers are bell-shaped, stalkless, and large, to 1 (15 to 25 mm) in diameter. There are 5 outer floral leaves (sepals), 5 petals, 5 stamens and 1 style. The sepals are green, awl-shaped or narrowly triangular, ¼ to (6 to 10 mm) long, and 132 to 116 (1 to 2 mm) wide. The sepals (collectively the calyx) are fused at the base into a short tube then separated into 5 lobes. The petals are purple, bluish-purple, or blue, rarely white. They are joined at the base into a corolla tube then separated into 5 pointed lobes. The lobes are bent backward and are as long as the corolla tube. The stamens are fused together into a tube into which the pollen is shed. The style pushes up through the anther tube pushing out the pollen. The stigma at the tip of the style has three lobes and protrudes well beyond the corolla tube. The stigma lobes strongly bend backward.

The fruit is a round or egg cone-shaped, 316 long capsule with numerous small seeds. The capsule is crowned by the persistent calyx lobes.




12 to 28 (30 to 70 cm)


Flower Color


Purple, bluish-purple, or blue, rarely white.


Similar Species


Dry to moderately moist. Forests, woodlands, woodland edges, thickets, grasslands, meadows, roadsides, and trails. Calcareous soil.




June to September


Pests and Diseases




Clustered bellflower is widely cultivated as an ornamental.


Distribution Map



2, 3, 4, 7, 22, 24, 29, 30.




Native to Europe and Asia. Widely cultivated. Rarely escapes cultivation. Now naturalized in North America.




Uncommon in Minnesota.

  Kingdom Plantae (green algae and land plants)  
  Subkingdom Viridiplantae (green plants)  
  Infrakingdom Streptophyta (land plants and green algae)  
  Superdivision Embryophyta (land plants)  
  Division Tracheophyta (vascular plants)  
  Subdivision Spermatophytina (seed plants)  
  Class Magnoliopsida (flowering plants)  
  Superorder Asteranae  


Asterales (sunflowers, bellflowers, fanflowers, and allies)  


Campanulaceae (bellflower)  
  Subfamily Campanuloideae  


Campanula (bellflower)  

Subordinate Taxa


clustered bellflower (Campanula glomerata ssp. glomerata)


There are fifteen subspecies of clustered bellflower worldwide. At least two are widely cultivated. Only one is naturalized in North America.






Common Names


clustered bellflower

Dane’s blood











The upper angle where a branch, stem, leaf stalk, or vein diverges.



The group of outer floral leaves (sepals) below the petals, occasionally forming a tube. Plural: calyces.



A collective name for all of the petals of a flower.



On plants: The stalk of a leaf blade or a compound leaf that attaches it to the stem. On ants and wasps: The constricted first one or two segments of the rear part of the body.



A horizontal, usually underground stem. It serves as a reproductive structure, producing roots below and shoots above at the nodes.



An outer floral leaf, usually green but sometimes colored, at the base of a flower.

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Found on a fairly dense woodland area. Just one cluster of it.

    clustered bellflower   clustered bellflower Photos


    clustered bellflower   clustered bellflower  


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    clustered bellflower      






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Other Videos
  Campanula glomerata 1.mp4
Beppe Lobba

Jan 29, 2016

Video del Centaurea Nigrescens Asteraceae: Fiordaliso nerastro - Seguici su

Google translation: Video of Centaurea Nigrescens Asteraceae: blackish cornflower (sic) - Follow us on




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Location: Fairview Twp, Cass County

Found on a fairly dense woodland area. Just one cluster of it.

clustered bellflower  




Created: 9/23/2020

Last Updated:

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