''Deinandra fasciculata'' (syn: ''Hemizonia fasciculata''), known by the common names clustered tarweed and fascicled spikeweed, is a species of flowering plant 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 w ...

native to western

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

.Jepson eFlora: ''Hemizonia fasciculata''
. accessed 4.16.2015

Range

''Deinandra fasciculata'' is native to

Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

and

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

(primarily from

San Diego County San Diego County (), officially the County of San Diego, is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the population was 3,298,634, making it California's second-most populous county and the fi ...

Monterey County Monterey County ( ), officially the County of Monterey, is a county located on the Pacific coast in the U.S. state of California. As of the 2020 census, its population was 439,035. The county's largest city and county seat is Salinas. Montere ...

, including several of the

Channel Islands The Channel Islands ( nrf, Îles d'la Manche; french: îles Anglo-Normandes or ''îles de la Manche'') are an archipelago in the English Channel, off the French coast of Normandy. They include two Crown Dependencies: the Bailiwick of Jersey, ...

; Calflora reports a few collections from the

San Francisco Bay San Francisco Bay is a large tidal estuary in the U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the big cities of San Francisco, San Jose, and Oakland. San Francisco Bay drains water from a ...

area, but these are from urban areas and probably represent cultivated specimens).Calflora taxon report, University of California, ''Deinandra fasciculata'' (DC.) Greene, Clustered tarweed
/ref> It is a common member of coastal

grassland A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur natur ...

habitats in the

California chaparral and woodlands The California chaparral and woodlands is a terrestrial ecoregion of southwestern Oregon, northern, central, and southern California (United States) and northwestern Baja California (Mexico), located on the west coast of North America. It is a ...

ecoregion and other habitats.

Description

''Deinandra fasciculata'' is a thin-stemmed branched

annual Annual may refer to: * Annual publication, periodical publications appearing regularly once per year **Yearbook ** Literary annual * Annual plant * Annual report * Annual giving * Annual, Morocco, a settlement in northeastern Morocco * Annuals (b ...

herb growing erect up to 100 cm (40 inches) in height. The upper leaves are narrow, about 1 centimeter long nested against the stem (more like short needles than leaves). The lower leaves are much bigger, up to 15 centimeters (6 inches) long. Each

flower head A pseudanthium (Greek for "false flower"; ) is an inflorescence that resembles a flower. The word is sometimes used for other structures that are neither a true flower nor a true inflorescence. Examples of pseudanthia include flower heads, compos ...

has a center of six yellowish

disc floret 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 w ...

s with black

stamens The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

surrounded by five yellow

ray florets 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 w ...

. The

generally have three teeth, the central tooth being the smallest. Plants flower in May through October. In this genus the

disk flowers 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 w ...

are actually big enough to be seen as tiny flowers to the naked eye.

The plant has a tar-like smell.

Ecology

''Deinandra fasciculata'' is pollinated by bees, and the seeds are primarily gravity-dispersed (they fall from the seed heads when mature). Seeds may also be dispersed by the many bird and small mammal species which eat them. This species may hybridize with other members of its genus, as well as with ''

Hemizonia ''Hemizonia'' is a genus of plants in the family Asteraceae. They are known generally as tarweeds, although some tarweeds belong to other genera, such as ''Madia'' and ''Deinandra''. Furthermore, ''Hemizonia'' is currently being revised; some sp ...

'' and '' Centromadia'' species.

References

External links

Jepson eFlora (TJM2) Treatment of ''Deinandra fasciculata''
*''Archived
Jepson Manual (TJM93): Hemizonia fasciculata
'
''Hemizonia fasciculata'' — Calphotos Photos gallery, University of California
{{Taxonbar, from=Q5252462 fasciculata Flora of California Flora of Baja California Natural history of the California chaparral and woodlands Natural history of the California Coast Ranges Natural history of the Channel Islands of California Natural history of the Peninsular Ranges Natural history of the Santa Monica Mountains Natural history of the Transverse Ranges Plants described in 1836 Flora without expected TNC conservation status