Navarretia rosulata is a rare species of flowering plant in the phlox family known by the common names San Anselmo navarretia, Marin County navarretia, and Marin County pincushionplant.[1]
The plant is endemic to California, where it is known from only about 20 occurrences in Marin and Napa Counties.[1]
It grows in chaparral and closed-cone pine forest habitats of the Northern California Coast Ranges, from 200m-600mm (700feet-2,000feetm) in elevation.[1]
It is endemic to rocky serpentine soils.[1]
Navarretia rosulata is a hairy, glandular annual herb growing up to 13cm (05inches) tall. It has a skunky scent. The leaves are divided into many linear lobes.
The inflorescence is a cluster of many flowers surrounded by leaflike bracts and hairy, glandular sepals. The flowers are white to lavender in color, tube-throated, and just under 1cm (00inches) long. The bloom period is May to July.[1]
This plant was considered a subspecies of Navarretia heterodoxa (Navarretia heterodoxa ssp. rosulata) until 1993, when it was separated and named a distinct species.[3]