Some plants are common, some are rare, and some are extremely rare.   There is a plant known only from 16 sites in the world (all Northern California) and 4 of those sites are located at the UC Hopland Research & Extension Center.  The critically imperiled plant is called Beaked Tracyina (Tracyina rostrata) and it is named after its discoverer Joseph P. Tracy (nw CA botanist 1878-1953).

The CA Rare Plant Rank is 1B.2 - meaning that it is rare, threatened, or endangered in CA and elsewhere, and is fairly endangered in California.  However, it is not, at least currently, either Federally or State listed.  It is "globally ranked" as G1G2 which means critically imperiled.  This CA endemic, nondescript range plant is in the Asteraceae family, and the 16 known locations are restricted to Humboldt, Lake, Mendocino, Sonoma, and Trinity counties.

After initial site discovery at some sites the plants have not been found again, leading to some speculation that the seeds do not germinate every year.  However, for the last two years at one of the prominent UC-HREC sites, plants were at first overlooked, but finally were found in good numbers but of very small stature (4 to 10 cm).  The plant can grow to 30 cm in height during years of prime growing conditions ... which is when the plants can be robust and easier to see... and some of the sites were discovered during such years. It is probable that the populations do germinate and grow each year, but are easily overlooked even by a trained botanist's eye.