Coreopsis lanceolata

Coreopsis lanceolata, the Lance-leaved coreopsis, is a North American species of  Tickseed in the sunflower family. It is native to the eastern and central parts of the United States and naturalized in Canada, the western United States, Mesoamerica, South America, South Africa and eastern Australia.剑叶金鸡菊</big> jian ye jin ji ju, Coreopsis lanceolata Linnaeus]</ref>

Description
Coreopsis lanceolata is a perennial plant sometimes attaining a height of over 60 cm (2 feet). The plant produces yellow flower heads in late summer, each head containing both ray florets and disc florets.

As an invasive plant
Introduced to Japan and China as an ornamental species and later used extensively in greenification projects, particularly along river banks and railways, Coreopsis lanceolata is now known to be outcompeting native plant life and has since 2006 been labeled an invasive species by the Invasive Alien Species Act. The cultivation, transplantation, sale, or purchase of Coreopsis lanceolata is now prohibited and the plant has become the subject of a nationwide destruction campaign, even earning a spot on the Ecological Society of Japan's 100 Worst Invasive Species list.
The species is also considered an invasive weed in Eastern Australia.

Cultivation
Coreopsis lanceolata is useful for pollinator restoration in large urban cities for providing a food source for wildlife as they tend to drink the nectar and/or eat the seed. The plant should not be over watered as it will flop over. Honeybees and butterflies are attracted to this plant and it may be restricted by growing in containers or in lawns that tend to be mowed. It requires little maintenance, although Deadheading is beneficial.

It prefers a sandy, well-drained soil.  Heavy, clay-based soil retains moisture in winter months, which can kill many species. However, rhizomatous coreopsis (underground stems) are well-adapted to withstand the extremes in soil moisture (both wet and dry). Adding compost to heavy soil can improve drainage as can creating a mounded bed, allows the planting area to shed rain faster than the ground around it. It thrives in full sun (4–6 hours of direct sunlight per day).

References

External links 

  United States Department of Agriculture information and pictures — Coreopsis lanceolata 
  Bioimages, Vanderbilt University photos + drawings
 Jepson Manual Treatment: Coreopsis lanceolata

lanceolata
Category:Flora of North America
Category:Natural history of the California chaparral and woodlands
Category:Plants described in 1753
Category:Garden plants of North America