''Calystegia peirsonii'' is a species of morning glory known by the common name Peirson's false bindweed. It 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 elsew ...

Los Angeles County, California Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the List of the most populous counties in the United States, most populous county in the United States and in the U.S. state of California, ...

, occurring at the junction of the

San Gabriel Mountains The San Gabriel Mountains ( es, Sierra de San Gabriel) are a mountain range located in northern Los Angeles County, California, Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Tr ...

and the

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 ...

in the vicinity of the

Antelope Valley The Antelope Valley is located in northern Los Angeles County, California, and the southeast portion of Kern County, California, and constitutes the western tip of the Mojave Desert. It is situated between the Tehachapi, Sierra Pelona, and the ...

Description

''Calystegia peirsonii'' is a rhizomatous perennial herb producing low-lying or climbing stems up to 40 centimeters long, and hairless and waxy in texture. The small leaves are up to 2 centimeters long, lobed, and generally triangular in shape. 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 o ...

produces flowers at the end of peduncles a few centimeters long. The white funnel-shaped flower is typical of morning glories and reaches up to 4 centimeters wide. The bracts form at the base of the peduncle and are short and rounded with an indented tip, usually only partially obscuring the calyx. The species is most similar to ''

Calystegia occidentalis ''Calystegia occidentalis'' is a species of morning glory known by the common names Modoc morning glory or chaparral false bindweed. It is native to California and Oregon, where it grows in hilly and mountain habitat, such as woodland and chapar ...

'' which can occur in the same region occasionally. However that species differs in longer, more strongly pointed bracts, and the fact that those bracts form several millimeters below the peduncle on the stem. Additionally ''C. occidentalis'' generally has more triangular leaves with less distinct lobing.

References

External links

Jepson Manual Treatment: ''Calystegia peirsonii''''Calystegia peirsonii'' Photo gallery
peirsonii Endemic flora of California Flora of the California desert regions Natural history of the California chaparral and woodlands Natural history of Los Angeles County, California Natural history of the Mojave Desert Natural history of the Transverse Ranges ~ {{Solanales-stub