Conoclinium greggii, Palmleaf Thoroughwort
Scientific Name: Conoclinium greggii
Common Name: Palmleaf Thoroughwort
Also Called: Gregg's Mistflower, Palm-leaf Mistflower, Palm-leaf Thoroughwort, Pinked Mistflower, Purple Palmleaf Mistflower, Purple Palmleaf Eupatorium
Family: Asteraceae, Sunflower Family
Synonyms: (Conoclinium dissectum, Eupatorium dissectum, Eupatorium greggii)
Size: Up to 2 feet (61 cm)
Growth Form: Forb/herb; rhizomatus often forming knotty crowns; stems glabrous, plants erect, ascending or decumbent.
Leaves: Green, leaves ovate-deltoid to ovate; palmate, dissected.
Flower Color: Blue, purplish-blue, lavender or purple; florets with thread-like stigmas; floral heads clustered together forming unique, pretty "flowers"; fruit a cypsela (type of achene).
Flowering Season: April to August; again October to November
Elevation: 1,500 to 5,000 feet (400-1400 m).
Habitat Preferences: Variable across wide geographic range, stream beds and other waterways such as washes and ditches; plains and mesas; dry sandy or rocky soil; mesquite and creosote bush-mesquite communities.
Recorded Range: Conoclinium greggii is relatively rare in the United States where it is found only in western Texas, southern New Mexico to southern Arizona. It is also native southward to Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Sonora, Zacatecas).
North America & US County Distribution Map for Conoclinium greggii.
U.S. Weed Information: No information available.
Invasive/Noxious Weed Information: No information available.
Threatened/Endangered Information: No information available
Wetland Indicator: In North America Conoclinium greggii has the following wetland designations: Arid West and Western Mountains, Valleys, and Coast FACU (Facultative Upland, usually occur in non-wetlands, but may occur in wetlands) and the Great Plains where it grows as a FACW = Facultative Wetland, usually occur in wetlands, but may occur in non-wetlands.
In the Southwestern United States: Arizona and New Mexico each have 1 species of Conoclinium, California, Nevada and Utah have 0 species and Texas has 3 species. All data approximate and subject to revision.Comments: This species is cultivated and sold commercially as a showy flowering plant in Arizona, California, New Mexico and Texas. These plants are sold under names of "Blue Mistflower", "Gregg's Blue Mist Flower", "Gregg's Mistflower", "Texas Ageratum" and "West Texas Ageratum".
Parts of the genus Conoclinium was previously classified as Eupatorium, however later research finds that they are more closely related to other plants of the genus Ageratum and Ageratina. This species is similar in flower as Fragrant Snakeroot, Ageratina herbacea.
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The species epithet "greggii" is named in honor of Gregg, Josiah.