- Coreopsis basalis
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Golden-mane Coreopsis Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Asterids Order: Asterales Family: Asteraceae Genus: Coreopsis Species: C. basalis Binomial name Coreopsis basalis
(A. Dietrich) S. F. Blake.Coreopsis basalis (Golden-mane Coreopsis) is a plant species of the genus Coreopsis in Asteraceae. Coreopsis species are commonly called tick seeds. These annuals grow 10–50+ cm tall with yellow flower heads marked in red-brown to purple near the base of the ray laminae, blooming in spring and early summer. They are native to the south central and south eastern states of the USA.
Description
Coreopsis basalis is a bushy annual species with finely cut foliage and showy round flowers. Plants with internodes 4–7(–10) cm long with both basal and cauline leaves. The foliage is produced on the bottom 3/4–7/8 of plants height. The leaf petioles are 8–35 mm (sometimes over 120 mm) long and the leaf blades are simple (mostly basal leaves) or some with a few pinnate lobes, the cauline leaves are generally cut with rounded lobes, with 3–9+ lobes per leaf. The simple leaf blades (or if lobed, the terminal lobes) elliptic or lanceolate to oblanceolate or linear in shape. The leaf blades are typically 25–55+ mm long and 2–9 mm wide but plants are variable and blade width can range from 1 to 20 mm. Peduncles holding the flower heads 6–15+ cm long. Phyllaries bracts under the flower heads lance-ovate shaped and 7–9+ mm long. The showy petals or more properly ray laminae are 15–20+ mm long and bright yellow with reddish markings near their attachment points to the head. Disc corollas 3–4 mm long and the apices are red-brown to purple in color. Cypselae or fruits with one seed each produced from fertilized flowers are 1.2–1.8 mm long and wingless but the margins tend to be in-rolled. [1]
Plants grow in sandy soils in open areas and are often found on disturbed ground. Golden-mane Coreopsis is native from the south Eastern and south central states of the USA.
Plants from western parts of its natural distribution area normally have narrower leaf blade lobes and narrower outer phyllaries, these plants have been segregated out as C. wrightii or as C. basalis var. wrightii in the past by some authorities. The species range in the eastern part of the USA is increasing as plants are used in landscaping.
Past names include:
- Calliopsis basalis A. Dietrich, Allg. Gartenzeitung 3: 329. 1835.
- Coreopsis basalis var. wrightii (A. Gray) S. F. Blake.
- Coreopsis wrightii (A. Gray) H. M. Parker ex E. B. Smith
References
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