Vascular Plants of the Gila Wilderness
Presented in Association with the
Western New Mexico University Department
of Natural Sciences
Packera quercetorum (Greene) C. Jeffrey
(Oak Creek Ragwort)
Family: Asteraceae
Status: Native
Synonyms:
Senecio quercetorum Greene
Packera quercetorum is a taprooted perennial. It has yellow ray and disc flowers, and one series
of green phyllaries. There are commonly a few purple stems from the base at which the leaves are clustered.
The leaves are the most obvious identifying feature, different from other local Packera and
Senecio species. The leaves
of P. quercetorum are deeply pinnatifid to the point of almost being pinnately compound. The distal
segment is the largest, with most of the segments being coarsely toothed. The degree of pubescence seems to
be highly variable from glabrous herbage to tomentose. When pubescence is present, it is usually more obvious
towards the base. P. quercetorum is usually found in more arid areas of Piñon/juniper woodland.
Please click on an image for a larger file.

Packera quercetorum, photo Wendy Graves, Gila NF, Burro Mtns., CD trail near MM26 off
Hwy 90, in seasonal gravelly creekbed in Piñon/juniper woodland, May, 2025

Packera quercetorum, inflorescences and leaves, photo Wendy Graves, Gila NF, Burro Mtns., CD trail near MM26 off
Hwy 90, in seasonal gravelly creekbed in Piñon/juniper woodland, May, 2025

Packera quercetorum, variability in basal leaves and color of stem in two plants right next to each other, photo Wendy Graves,
Gila NF, Burro Mtns., CD trail near MM26 off Hwy 90, in seasonal gravelly creekbed in Piñon/juniper woodland, May, 2025

Packera quercetorum, variability in basal leaves and color of stem in two plants right next to each other, photo Wendy Graves,
Gila NF, Burro Mtns., CD trail near MM26 off Hwy 90, in seasonal gravelly creekbed in Piñon/juniper woodland, May, 2025
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