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.

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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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