''Camissonia lacustris'' is a flowering plant species commonly called grassland suncup. It is an

evening primrose ''Oenothera'' is a genus of about 145 species of herbaceous flowering plants native to the Americas. It is the type genus of the family Onagraceae. Common names include evening primrose, suncups, and sundrops. They are not closely related to ...

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 elsew ...

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 ...

, where it grows on the grasslands of the

Sierra Nevada foothills :''See Sierra Nevada for general information about the mountain range in the United States.'' The ecology of the Sierra Nevada, located in the U.S. states of California and Nevada, is diverse and complex: the plants and animals are a significant ...

. It is also known from an area in the

Northern 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. Phy ...

in Lake County. It is an annual herb producing an erect or spreading, sometimes bending or twisting, hairy stem approaching half a meter in maximum length. The leaves grow along the stem and are less than 4 centimeters long and linear or narrowly oval in shape. The nodding

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 o ...

produces flowers with yellow petals about half a centimeter in length. The petals sometimes have two red dots at their bases. The fruit is a straight wavy capsule which may be several centimeters long.

References

External links

Jepson Manual TreatmentPhoto gallery
lacustris Endemic flora of California Flora of the Sierra Nevada (United States) {{myrtales-stub