''Coreopsis hamiltonii'', the Mt. Hamilton coreopsis, is a rare California

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

of ''

Coreopsis ''Coreopsis'' () is a genus of flowering plants in the family Asteraceae. Common names include calliopsis and tickseed, a name shared with various other plants. Description These plants range from in height. The flowers are usually yellow w ...

'' in the family

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae ...

. It is found only in a small region including Mount Hamilton and the

Diablo Range The Diablo Range is a mountain range in the California Coast Ranges subdivision of the Pacific Coast Ranges in northern California, United States. It stretches from the eastern San Francisco Bay area at its northern end to the Salinas Valley ...

in the southwestern

San Francisco Bay Area The San Francisco Bay Area, often referred to as simply the Bay Area, is a populous region surrounding the San Francisco, San Pablo, and Suisun Bay estuaries in Northern California. The Bay Area is defined by the Association of Bay Area Gov ...

(

Alameda An alameda is a street or path lined with trees () and may refer to: Places Canada *Alameda, Saskatchewan, town in Saskatchewan **Grant Devine Dam, formerly ''Alameda Dam'', a dam and reservoir in southern Saskatchewan Chile * Alameda (Santiago ...

, Santa Clara, and Stanislaus Counties).

Description

''Coreopsis hamiltonii'' typically grows tall or sometimes taller when in bloom. The foliage is low growing, producing bright golden yellow colored

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism ...

heads and red purplish tinted

peduncle Peduncle may refer to: *Peduncle (botany), a stalk supporting an inflorescence, which is the part of the shoot of seed plants where flowers are formed *Peduncle (anatomy), a stem, through which a mass of tissue is attached to a body **Peduncle (art ...

s. The foliage is deeply cut with a thin ferny shape.Elmer, Adolph Daniel Edward 1906. Botanical Gazette 41(5): 323–324
as ''Leptosyne hamiltonii'' It can be found blooming from March to May in California, where plants are found growing from above sea level.Flora of North America, ''Coreopsis hamiltonii''
/ref>

References

External links

Jepson Manual Treatment: ''Coreopsis hamiltonii''

United States Department of California Plants Profile

''Coreopsis hamiltonii'' — University of California Calphotos Photo gallery
hamiltonii Endemic flora of California Natural history of the California chaparral and woodlands Natural history of the California Coast Ranges ~ Natural history of the San Francisco Bay Area Plants described in 1906 Natural history of Santa Clara County, California Taxa named by Adolph Daniel Edward Elmer {{Coreopsideae-stub