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As the common name suggests, tall coreopsis can reach heights of 8 feet or more, with a vase-shaped spread ranging from 2 to 8 feet. Tall coreopsis' flowers bloom from July through September.
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, some 75–80 in all, under Coreopsis . 45 species are in the 11 North American sections, and the remaining 35 ...
Coreopsis tinctoria, commonly known as plains coreopsis, garden tickseed, golden tickseed, or calliopsis, is an annual forb. The species is common in Canada (from Quebec to British Columbia ), northeast Mexico ( Coahuila , Nuevo León , Tamaulipas ), and most of the United States , especially the Great Plains and Southern States .
Germination takes between 7 and 21 days at the optimal temperature of 75 degrees Fahrenheit; flowering begins between 50 and 60 days after germination; It prefers a soil pH between 6.0 and 8.5, reflecting its native habitat in the alkaline regions of Central America; Flowering is best in full sun, although partial shade is tolerated
Coreopsis latifolia, a rhizomatous perennial herb, grows up to 1.5 metres (4.9 ft) tall. The leaves are oval and may exceed 20 centimetres (7.9 in) long by 10 centimetres (3.9 in) wide. [5] The inflorescence is a corymb [3] of flower heads, each with five phyllaries which may be over a centimeter long.
The rest of Iowa now ranges from Zone 4b, with a temperature threshold of minus 25 degrees, to Zone 6a in the extreme southeast and southwest, with a minus 10 degree threshold. The addition of 6a ...
Coreopsis rosea grows in wet areas such as marsh edges. [3] Unlike most Coreopsis species, the ray florets are pink or white (instead of yellow). [3] The only other Coreopsis species with pink rays is C. nudata; C. rosea does not seem to be closely related to Coreopsis species which merely have red dots at the base of the rays. [4]
The blue numbers are the amount of precipitation in either millimeters (liters per square meter) or inches. The red numbers are the average daily high and low temperatures for each month, and the red bars represent the average daily temperature span for each month. The thin gray line is 0 °C or 32 °F, the point of freezing, for orientation.