''Camissonia campestris'' (field primrose,Mojave Desert Wildflowers, Pam MacKay, 2nd ed., 2013, Mojave sun cup, or Mojave suncup), is a

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

in the family

Onagraceae The Onagraceae are a family of flowering plants known as the willowherb family or evening primrose family. They include about 650 species of herbs, shrubs, and trees Mojave Desert The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily in ...

of the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. It grows mostly on open, sandy flats, occurring from sea level to 2,000 m in the western and central part of the desert. It is an

annual plant An annual plant is a plant that completes its life cycle, from germination to the production of seeds, within one growing season, and then dies. The length of growing seasons and period in which they take place vary according to geographical ...

growing to 5–25 cm tall (rarely to 50 cm tall). The

leaves A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ...

are linear, 0.5–3 cm long, with a finely serrated margin. The

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 mechani ...

s have four petals 5–15 mm long, yellow with a red spot at the base, fading orange to reddish.

References

Jepson Flora Project: ''Camissonia campestris''
*''Mojave Desert Wildflowers'', Jon Mark Stewart, 1998, pg. 76 campestris North American desert flora Flora of California Plants described in 1891 {{Myrtales-stub