Conoclinium coelestinum (Mist-flower)

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Conoclinium coelestinum (L.) DC.

Mist-flower, blue mistflower, blue boneset

Kingdom	Plantae	Plants, but not fungi, lichens, or algae
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Asteridae	A large class that encompasses asters
Order	Asterales	Flowering plants with a central disk flower and surrounding petals, like daisies
Family	Asteraceae	The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
Genus	Conoclinium	From Greek κῶνος (konos), “cone;” and κλινίον (klinion), “little bed”
Species	coelestinum	“Sky blue,” for the flower color

About plant names...

Blue mistflower is native to North America.

Identification: Plants are 18-36" (45-91 cm) in height. Leaves are roughly triangular (deltate), opposite, wrinkly, with blunt teeth (dentate or dentate-crenate), up to 3" (7.6 cm) × 2" (5 cm). Flowers appear in clusters that are almost flat-topped, and 1-3" (2.5-7.6 cm) around. The flowers are brushlike disc flowers—composed of 40-50 threadlike disc florets—that are blue or purple.^[1] Flowers are ¼-⅜" (6.3-9.5 mm) in size, appearing from July to October. Technically these are composite flowers, like other members of the enormous aster family, but this species lacks ray flowers.

Online References:

Illinois Wildflowers

Jeffpippen.com

Wildflowers of the United States

Floridata.com

The Missouri Botanical Garden

The Lady Bird Johnson Wildflower Center

9/21/2012 · By Jacquelyn Boyt

4/14/2015 · Everglades National Park, Florida
≈ 3 × 2½" (7.6 × 6.6 cm)

4/13/2015 · Ernest F. Coe Visitor Center, Everglades National Park, Florida
≈ 4 × 4½" (10 × 11 cm)

¹Steve Christman at Floridata says others have described the unique color as clear blue, powder blue, azure blue, bluish-purple, reddish-purple, blue-pinkish, and pink-purplish. He prefers 'sky-blue pink.'

Eupatorium coelestinum L.

Conoclinium coelestinum description by Thomas H. Kent, last updated 15 Jul 2023.

9/1/2013 · Colonial Williamsburg, Williamsburg, Virginia
≈ 33 × 49" (83 × 125 cm)

9/1/2013 · Colonial Williamsburg, Williamsburg, Virginia
≈ 33 × 34" (83 × 86 cm)

4/13/2015 · Ernest F. Coe Visitor Center, Everglades National Park, Florida
≈ 6 × 4" (16 × 10 cm)

9/1/2013 · Colonial Williamsburg, Williamsburg, Virginia
≈ 12 × 14" (29 × 34 cm)

Range: Zones 4-11:

About this map...