Jepson eFlora
Key to families | Table of families and genera

Key to Crataegus

View taxon page for Crataegus

1. Short-shoot leaves deeply lobed, veined to sinuses; fruit red to deep red ..... C. monogyna

1' Short-shoot leaves unlobed to shallowly lobed, not veined to sinuses; fruit deep purple to black

2. Stamens ± 20; short-shoot leaves unlobed to shallowly lobed; thorns 8–12 mm ..... C. gaylussacia

2' Stamens ± 10; short-shoot leaves generally shallowly lobed; thorns 15–23 mm

3. Inflorescence hairy; thorns 18–23 mm ..... C. castlegarensis

3' Inflorescence glabrous; thorns 15–18 mm ..... C. douglasii

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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