slender sowthistle

Sonchus tenerrimus

Member of sow thistles (genus Sonchus)
yellow dandelion-like flowers
lettuce, chicory, dandelion, and salsify tribe (tribe Cichorieae)
thistles
sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

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• annual
• stem generally much-branched
• stem slender
• leaves deeply lobed, lobes toothed and often with smaller 2nd-order lobes
• involucre 10–12 mm
• petal ± ⅓ > corolla tube
• fruit only slightly flattened, 1–3 ribbed per face, ribs roughened
• Alum Rock [only one ID]

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Chris’s observations: none

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

Bay Area species: iNaturalist – Calflora