Coreopsis maritima

Coreopsis maritima
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Coreopsis
Species:	C. maritima
Binomial name
Coreopsis maritima (Nuttall) Hooker f.

Coreopsis maritima, the sea dahlia or beach coreopsis,^[1] is a plant species of the genus Coreopsis in Asteraceae. Coreopsis species are commonly called tickseeds.

Coreopsis maritima is native to Southern California and Baja California, in coastal California chaparral and woodlands habitats. It grows on mainland ocean bluffs and on the offshore Channel Islands.^[2]

Description

Coreopsis maritima is a perennial that grows 10–40 cm tall but sometimes to 80 cm (4 to 32 inches). The plant has foliage that is lobed and mostly linear in shape with lobes that are 5–30 mm long and 1–2 mm wide. The 12–20 mm long flower phyllaries number 12–13, sometimes more, and they are lanceolate shaped.^[3]

Plants bloom in late winter to early summer, with normally one or two flower heads per stem, on 15 to 30 cm long peduncles, but sometimes 4 or more flowers can be found per stem. Flower heads have 16-21 ray florets typically and the laminae are 20–35+ mm long.

The disc corollas are 5.5–7 mm long.^[3]

Cypselae or fruits, are 6–7 mm long and oblong-rectangular in shape.^[3]

Taxonomy

• Synonyms: Tuckermannia maritima Nuttall.

• Upper Taxa: Coreopsis Linnaeus sect. Tuckermannia^[4] also written as C. sect. Tuckermannia^[5] and Coreopsis sect. Tuckermannia

References

Wikimedia Commons has media related to Coreopsis maritima.

External links

• Jepson Manual Treatment: Coreopsis maritima
• USDA Plants Profile: Coreopsis maritima (Sea dahlia)
• Coreopsis maritima — U.C. Photo gallery
• Proceedings of the American Academy of Arts and Sciences