san joaquin tarweed

Holocarpha obconica

Member of genus Holocarpha
tarweeds and allies (tribe Madieae)
sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

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• anthers yellow to ± brown
• stem resinous distally, not notably stalked-glandular
• phyllaries each with (0)5–15(20) pit-gland-tipped outgrowths and generally glabrous or minutely sessile- or stalked-glandular (bristly)
• heads in flat-topped or panicle-like clusters
• rare at Grant, Del Valle, Mt. Diablo

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Chris’s observations: none

Taxon info: iNaturalist – Calflora – CalPhotos – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora