''Sidalcea hartwegii'' is a species of flowering plant in the

mallow family Malvaceae, or the mallows, is a family of flowering plants estimated to contain 244 genera with 4225 known species. Well-known members of economic importance include okra, cotton, cacao and durian. There are also some genera containing familiar o ...

known by the common names valley checkerbloom and Hartweg's checkerbloom.Calflora: ''Sidalcea hartwegii''
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Distribution

The plant is

endemic Endemism is the state of a species being found 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 found els ...

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...

, where it grows in the

Sacramento Valley , photo =Sacramento Riverfront.jpg , photo_caption= Sacramento , map_image=Map california central valley.jpg , map_caption= The Central Valley of California , location = California, United States , coordinates = , boundaries = Sierra Nevada (ea ...

and adjacent foothills of the

California Coast Ranges The Coast Ranges of California span from Del Norte or Humboldt County, California, south to Santa Barbara County. The other three coastal California mountain ranges are the Transverse Ranges, Peninsular Ranges and the Klamath Mountains. Ph ...

to the west, and of the

Sierra Nevada The Sierra Nevada () is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primari ...

to the east. It can be found in

oak woodland An oak woodland is a plant community with a tree canopy dominated by oaks (''Quercus spp.''). In terms of canopy closure, oak woodlands are intermediate between oak savanna, which is more open, and oak forest, which is more closed. Although the ...

and grassland habitats below , sometimes on serpentine soils.

Description

''Sidalcea hartwegii'' is an annual herb that produces a slender stem up to tall, mostly hairless with occasional branching hairs. The leaf blades are deeply divided into five to seven narrow linear lobes. The

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed ...

is a clustered

panicle A panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit In botany, a fruit is the seed-bearing structure in flowering plants that is ...

of four to six flowers, each with five purplish pink petals about 2 centimeters long. The bloom period is May and June.

References

External links

Calflora Database: ''Sidalcea hartwegii'' (Hartweg sidalcea, Hartweg's checkerbloom, Valley checkerbloom)Jepson Manual eFlora (TJM2) treatment of ''Sidalcea hartwegii''USDA Plants Profile for ''Sidalcea hartwegii''UC CalPhotos gallery: ''Sidalcea hartwegii''
hartwegii Endemic flora of California Natural history of the California chaparral and woodlands Natural history of the Central Valley (California) Natural history of the California Coast Ranges Flora of the Sierra Nevada (United States) ~ Flora without expected TNC conservation status {{Malveae-stub