Tickseed Plant Information
Tickseed grows in the following 48 states:Arizona, Colorado, Connecticut, District Of Columbia, Georgia, Idaho, Illinois, Indiana, Kansas, Kentucky, Maryland, Minnesota, Mississippi, Montana, Nebraska, New Hampshire, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, South Dakota, Vermont, Wisconsin, Wyoming, Oregon, West Virginia, Alabama, Arkansas, California, Delaware, Florida, Hawaii, Iowa, Louisiana, Maine, Massachusetts, Michigan, Missouri, New Jersey, New York, North Dakota, Ohio, Rhode Island, Tennessee, Texas, Virginia, Washington
Coreopsis /kripss/ is a genus of flowering plants in the family Asteraceae. Common names include calliopsis and tickseed, a name shared with various other plants.
They range from 46-120cm (18-47in) in height. The flat fruits are small and dry and look like bugs. Many of its species are cultivated. The 75 to 80 Coreopsis species are native to North, Central, and South America. The flowers are usually yellow with a toothed tip. They have showy flower heads with involucral bracts in two distinct series of eight each, the outer being commonly connate at the base. The name Coreopsis is derived from the Greek words (koris), meaning "bedbug," and (opsis), meaning "view," referring to the shape of the achene.
Coreopsis species are used as food plants by the caterpillars of some Lepidoptera species including Coleophora acamtopappi. The sunny, summer blooming, yellow daisy-like flowers are popular in gardens to attract butterflies.
All Coreopsis species were designated the state wildflower of Florida in the United States in 1991.
Coreopsis is a variable genus closely related to Bidens. In fact, neither Coreopsis nor Bidens, as defined in the 20th century, is strictly monophyletic. Coreopsis is best described as paraphyletic. Previously (1936) Coreopsis was classified into 11 sections and 114 species, but the African species were subsequently reclassified as Bidens, leaving the North and South American species under Coreopsis, some 75-80 in all. 45 are in the 11 North American sections, and the remaining 35 are in the South American Section Pseudoagarista. The North American species fall into two broad groups, with 5 sections in Mexico and North America (12 species) and the remaining 5 sections in Eastern North America (26 species).
One group which does seem to be monophyletic consists of temperate species from North America, including five sections of Coreopsis, Bidens coronata and Bidens tripartita, and the genus Thelesperma (five species).
One classification (GRIN) of the genus consists of eleven sections, shown by cladistic relationships with number of species in parenthesis.
Mexico and Western North America
Eastern North America
South America, 35 species
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