High Quality Content by WIKIPEDIA articles! Erigeron petrophilus is a species of flowering plant in the daisy family known by the common names rockloving erigeron. It is native to the mountain ranges of northern California and far southern Oregon, where it grows in forest and woodland, often, as its name suggests, in rocky habitat. It is sometimes a member of the serpentine soils flora. This is a perennial herb growing many hairy, glandular, spreading stems from a tough, woody caudex. The narrow, oblong leaves are equal in size and spaced evenly along each stem. The inflorescence is a cluster of several flower heads, each just over a centimeter wide and lined with layers of fuzzy, glandular phyllaries. The heads are discoid, containing many yellow disc florets and no ray florets. The fruit is a small achene with a pappus of bristles.