How to identify Large-flowered tickseed (Coreopsis grandiflora)

How to identify Large-flowered tickseed (Coreopsis grandiflora)

Large-flowered tickseed, also known as Bigflower tickseed

Large-flowered tickseed impresses with its bright yellow, showy floral display, easily catching one’s eye from late spring through to late summer. This robust perennial possesses the ability to form dense clumps spanning 1-3 feet (30-91 cm) in both height and width. Its individual blossoms are notably large for its genus, which coupled with the vibrant color, make it a standout during the blooming season. The practice of deadheading spent blooms ensures a prolonged floral spectacle, indicative of its enduring ornamental appeal.

Lifespan: Perennial, Annual

Plant Type: Herb

Leaf Type: Deciduous

Quickly Identify Large-flowered tickseed

Large, bright yellow flowers with 6-12 ray florets and numerous disk florets.

Compact, oblong achenes in straw-yellow to soft brown tones, less than 1 inch long.

Distinct leaf variation: basal leaves linear, upper leaves deeply lobed, oppositely arranged.

Robust perennial forming dense clumps 1-3 feet (30-91 cm) in height and width.

Practice deadheading for a prolonged floral display of vibrant yellow blooms from late spring to late summer.

Detailed Traits of Large-flowered tickseed

Leaf Features

The leaves of large-flowered tickseed exhibit a distinct morphological variation between the base and upper regions. Basal leaves are lobeless, linear, and measure up to 3 inches (7.6 cm) long and 2 inches (5 cm) wide. In contrast, the upper leaves are pinnatifid, deeply lobed, and approximately 1/2 inch (1.3 cm) wide. Both sets of leaves are oppositely arranged. The vein pattern is pronounced, and the texture is herbaceous, contributing to the plant's recognizable foliage.

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Flower Features

The 2.5-inch (6.35 cm) yellow flowers of large-flowered tickseed are comprised of 6-12 bright yellow ray florets, each featuring 4-5 notches along the outer edge of the petal, encircling numerous golden yellow disk florets. These vibrant blooms emit a subtle scent and appear from late spring to late summer, making them easily recognizable. The overall arrangement and bright coloration are key identifiers for flower enthusiasts.

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Fruit Features

The fruit of large-flowered tickseed is characterized as a dry, single-seeded structure known as an achene. These fruits display a flat, oblong shape, embodying a simplistic and streamlined form. Upon maturity, they can exhibit a range of tones from straw-yellow to soft brown hues. Typically, the achenes are compact and may measure less than an inch (approximately 2 to 3 cm) in length. Their surface is often smooth to the touch, with a firm texture that safeguards the seed inside. Featuring these attributes, the achenes are a distinctive aspect of large-flowered tickseed's reproductive cycle.

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Large-flowered tickseed and Their Similar Plants

Lance-leaved coreopsis vs. Large-flowered tickseed: What's The Difference?

The lance-leaved coreopsis attracts pollinators such as honeybees and butterflies but is considered an invasive species in many countries, such as Japan. Originally native to the eastern U.S., it has since spread around the world. The lance-leaved coreopsis grows well in wet or dry soil.

Plains coreopsis vs. Large-flowered tickseed: What's The Difference?

Plains coreopsis (Coreopsis tinctoria) is an annual flowering plant common to Canada, the United States, and China. Plains coreopsis grows along roadsides and agricultural fields. Plains coreopsis is cultivated in gardens and prefers well-drained sandy soils. The blossoms can be made into mahogany dye.

Whorled tickseed vs. Large-flowered tickseed: What's The Difference?

Whorled tickseed (Coreopsis verticillata) is a flowering tickseed plant species that grows in North America, specifically throughout the eastern United States. Whorled tickseed grows in thin woodland areas and can withstand harsh weather conditions. In horticulture, whorled tickseed are often grown in hanging baskets and containers. They attract butterflies.

Lobed tickseed vs. Large-flowered tickseed: What's The Difference?

The lobed tickseed is a wildflower that blooms from early to late spring. The leaves typically only sprout low to the ground, leaving the bright flower atop a long bare stem. This flower will bloom in a scattered pattern until the frosty winter months.

Tall tickseed vs. Large-flowered tickseed: What's The Difference?

Tall tickseed, or Coreopsis tripteris, gets its name because of its height. This flowering perennial can reach up to 2 to 2.5 m tall. This plant can spread aggressively, so be careful of where you plant it. It grows easily from seed and is just full of bright yellow flowers.

Giant Coreopsis vs. Large-flowered tickseed: What's The Difference?

Giant Coreopsis is a woody, succulent perennial that is found in coastal areas of western North America and cultivated by nurseries. It is highly drought-tolerant, but susceptible to frost. A member of the sunflower family, it is covered in yellow blooms in the spring and summer. Giant Coreopsis grows up to 1.2 m tall.

Greater Tickseed vs. Large-flowered tickseed: What's The Difference?

Greater Tickseed (*Coreopsis major*) is a perennial that blooms from spring to summer with large and showy bright yellow daisy-like flowers. Flowers attract butterflies, bees, and other pollinators. Seeds are shiny black and oblong, appearing from summer to fall and attracting many songbirds. It thrives in full sun to partial shade in well-drained soil.

Whorled tickseed 'Moonbeam' vs. Large-flowered tickseed: What's The Difference?

A cultivar of Coreopsis, whorled tickseed 'Moonbeam' produces mounds of daisy-like, lemon-yellow blossoms and finely divided leaves. Its name derives from its subtle coloring, as other cultivars produce intensely yellow or even two-toned flowers. Whorled tickseed 'Moonbeam' is noted to be long-lived, and it was the winner of the 1992 "Perennial Plant of the Year" Award.

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Key Facts About Large-flowered tickseed

Attributes of Large-flowered tickseed

Lifespan

Perennial, Annual

Plant Type

Herb

Plant Height

20 cm to 1 m

Spread

45 cm to 60 cm

Leaf Color

Green

Flower Size

4 cm to 5 cm

Flower Color

Yellow

Gold

Orange

Fruit Color

Brown

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Scientific Classification of Large-flowered tickseed

Phylum

Vascular plants

Class

Dicotyledons

Order

Asters bellflowers fanflowers and allies

Family

Daisy

Genus

Calliopsis

Species

Large-flowered tickseed (Coreopsis grandiflora)

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Distribution Map of Large-flowered tickseed

Large-flowered tickseed originates from North America and has spread widely as a cultivated plant. This perennial has become naturalized in areas across Europe, Asia, and even South America. While it is not native beyond North America, its adaptability has allowed it to thrive in various temperate zones and regions around the globe, establishing a broad introduced range.

Native

Cultivated

Invasive

Potentially invasive

Exotic

No species reported

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A Comprehensive Guide to Large-flowered tickseed How to Grow and Care for Large-flowered tickseed