''Leptosyne calliopsidea'' is a species of flowering plant in the daisy family known by the common name leafstem tickseed. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

. The plant grows in some of the southern coastal mountain ranges and

Transverse Ranges The Transverse Ranges are a group of mountain ranges of Southern California, in the Pacific Coast Ranges physiographic region in North America. The Transverse Ranges begin at the southern end of the California Coast Ranges and lie within Santa Ba ...

and the

Mojave Desert The Mojave Desert (; ; ) is a desert in the rain shadow of the southern Sierra Nevada mountains and Transverse Ranges in the Southwestern United States. Named for the Indigenous peoples of the Americas, indigenous Mohave people, it is located pr ...

from Alameda and Inyo Counties south to

Riverside County Riverside County is a county located in the southern portion of the U.S. state of California. As of the 2020 census, its population was 2,418,185, making it the fourth-most populous county in California and the 10th-most populous in the Unit ...

.Calflora taxon report, University of California, ''Leptosyne calliopsidea'' (DC.) A. Gray, Leafy stemmed coreopsis
/ref>

Description

''Leptosyne calliopsidea'' is an annual herb producing one or more stems growing up to about 40 centimeters (16 inches) tall, or sometimes taller. The slightly fleshy leaves are located mainly around the base of the stem, each divided into several narrow lobes. The

inflorescence In botany, an inflorescence is a group or cluster of flowers arranged on a plant's Plant stem, stem that is composed of a main branch or a system of branches. An inflorescence is categorized on the basis of the arrangement of flowers on a mai ...

consists of a single flower head with a bell-shaped involucre of triangular phyllaries. The

head A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple ani ...

has a center of up to 50 tiny yellow

disc floret Asteraceae () is a large family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger fa ...

s and a fringe of usually 8 bright yellow

ray florets Asteraceae () is a large family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger fa ...

each up to 3.5 centimeters (1.4 inches) long. The fruit is an

achene An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple fruit, simple dry fruits, dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and Dehi ...

. The fruit of the ray floret is oval and hairless and lacks a pappus; that of the

is more slender, shiny, lined with hairs, and tipped with a pappus of scales.Jepson Manual Treatment: ''Coreopsis calliopsidea''
/ref>Flora of North America
/ref>

References

External links

''Leptosyne calliopsidea'' at Jepson eFloraUnited States Department of Agriculture Plants Profile''Coreopsis calliopsidea'' — Calphotos Photo gallery, University of California
calliopsidea Endemic flora of California Flora of the California desert regions Natural history of the California chaparral and woodlands Natural history of the Mojave Desert Natural history of the Transverse Ranges Flora without expected TNC conservation status Plants described in 1836 Taxa named by Augustin Pyramus de Candolle {{Coreopsideae-stub