|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Rosaceae||View Description||Dichotomous Key|
|Genus: Crataegus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Crataegus monogyna Jacq.
Stem: thorns of indefinite growth. Leaf: of short-shoots 3--5 cm, widely ovate, deeply sharp-lobed. Flower: 13--16 diam; sepals triangular; stamens 20, anthers pink-purple; style 1. Fruit: 10 mm diam, elliptic to +- spheric, red to deep red; stone 1. Chromosomes: 2n=34,51.
Ecology: Naturalized in scattered places; Elevation: 500 m. Bioregional Distribution: NCo, NCoR, SnFrB; Distribution Outside California: temperate North America; native to temp western Eurasia. Flowering Time: May--Aug
Unabridged Note: Cv 'Crimson Cloud' in retail commerce.
eFlora Treatment Author: James B. Phipps
Jepson Online Interchange
Weed listed by Cal-IPC
Previous taxon: Crataegus gaylussacia
Next taxon: Dasiphora
Citation for this treatment: James B. Phipps 2016. Crataegus monogyna, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=20843, accessed on May 06, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 06, 2016.