Coreopsis lanceolata (Lanceleaf tickseed)

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Coreopsis lanceolata L.

Lanceleaf tickseed, lance-leaved tickseed

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	Coreopsis	From the Greek koris, “a bug,” and -opsis, indicating a resemblance, therefore meaning bug-like, referring to the achenes which look like ticks
Species	lanceolata	Lance-like, referring to the shape of the leaves

About plant names...

Lance-leaved coreopsis is a North American native, and a member of the sunflower family. It has since become naturalized through much of North, Central and South America; as well as South Africa and eastern Asia. In parts of Asia, especially Japan, it is considered an invasive species. It appears on sandy shores and banks, grasslands, roadsides, and oak-pine savanna. They are popular garden plants, and many cultivars exist.

Plants: Plants are 8-32" (20-81 cm) tall, hairless or hairy, erect or prostrate.

Leaves: Leaves are 2-8" (5-20 cm) long, usually opposite but sometimes alternate near the top. Most leaves are near the base. Some leaves are deeply cut, almost forming three leaves. They are sessile, and lance- or spoon-shaped, or narrowly oval.

Flowers: These composite flowers consist of 6-10 yellow ray flowers, the “petals;” and yellow disc flowers, numerous tiny florets that make up the center. Each ray flower has four fused lobes, leaving three teeth at the end. Flowers are 1-1½" (2.5-3.8 cm) around, sometimes larger. Flowers appear from May to July.

Fruits: The disc flowers become brown flattened seeds (achenes) ¹/₃₂" (1.2 mm) long, with two small awns.

Online References:

Missouriplants.com

Wildflowers of the United States

Discover Life

The University of Florida Institute of Food and Agricultural Sciences

The Missouri Botanical Garden

Wikimedia Commons

References:

Clemants, Steven; Gracie, Carol, Wildflowers in the Field and Forest, Oxford University Press, 2006, p. 200