Parvisedum congdonii Sedella congdonii is a species of flowering plant in the family Crassulaceae known by the common name Congdon's mock stonecrop.

[1] It is endemic to California, where it can be found in the Sierra Nevada, often in rocky and moist habitat types.

It is an annual herb growing just a few centimeters high.

The oval succulent leaves are just a few millimeters long.

The flowers occur in a cyme on thin branches.