Coreopsis basalis
Encyclopedia
Coreopsis basalis 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.
s 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. Peduncle
s 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 fruit
s 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.
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:
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
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 internodeInternode
Internode may refer to:* A portion of a plant stem between nodes* Internode , an Internet service provider in Australia* Internodal segment, a portion of a nerve fiber...
s 4–7(–10) cm long with both basal
Anatomical terms of location
Standard anatomical terms of location are designations employed in science that deal with the anatomy of animals to avoid ambiguities that might otherwise arise. They are not language-specific, and thus require no translation...
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. Peduncle
Peduncle (botany)
In botany, a peduncle is a stem supporting an inflorescence, or after fecundation, an infructescence.The peduncle is a stem, usually green and without leaves, though sometimes colored or supporting small leaves...
s 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 fruit
Fruit
In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,...
s 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.
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