thickleaf willow dock

Rumex crassus

Member of docks (genus Rumex)
knotweed family (family Polygonaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

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CalPhotos

• generally with leafy axillary shoots below terminal inflorescence
• 1–3 conspicuous perianth tubercles
• common mostly directly on the pacific coast

Toxicity of dock, sorrel (Rumex spp.):
2b – These plants contain oxalate crystals but they do not cause immediate problems. These plants have tiny crystals that lodge in the kidneys and can cause kidney damage as well as nausea, vomiting and diarrhea.

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Chris’s observations: none

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

Bay Area species: iNaturalist – Calflora