common hawthorn

Crataegus monogyna

Member of hawthorns (genus Crataegus)
rose family (family Rosaceae)
dicots (class Magnoliopsida)
white in flowering plants

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• leaves are deeply lobed, sometimes almost to the midrib
• flower has 1 style
• fruit is round and has 1 seed

Toxicity of crataegus, hawthorn, may bush, thorn apple (Crataegus spp.):
0 – Non-toxic.

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Chris’s observations: 7 (1 is research grade)

Locations:

• Sibley Volcanic RP: 4
• San Bruno Mountain State & County Park: 2
• San Pedro Valley CP

Months:

• May: 1
• Jun.: 0
• Jul.: 0
• Aug.: 2
• Sep.: 3
• Oct.: 1

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

Bay Area species: iNaturalist – Calflora