Jepson Flora Project: Jepson Interchange for California Floristics    
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Crataegus monogyna Jacq.

Information from the Index of California Plant Names (ICPN)
Initial Editorial Analysis 26 Jan 2010
Source of Report for California  
a 1998 Botanical Electronic News. Published on the Internet at:, as cited in Kartesz & Meacham
b Hrusa et al., ms later published in Madrono 49(2)61-98. 2002: DISTRIBUTION: SnFrB.; STATUS: sparingly naturalized.; NOTES: also observed as widely scattered plants in Napa Co.; "...observed by Ertter as well-established in Sibley Volcanic Regional Preserve..."
c Hrusa et al., Madrono 49(2)61-98. 2002: DIST: NCoRO, SnFrB: Hrusa et al. Current Status: Naturalized in wildlands: DOC: Alameda Co.: Dry Creek/Pioneer Regional Park east of Hayward. Jan. 19, 1992, B. Ertter 10894 (UC); Anthony Chabot Regional Park, Cascade Trail. April 29, 1981, Jack Stratford s.n. (JEPS); also observed by Ertter as well-established in Sibley Volcanic Regional Preserve, Oakland Hills; San Mateo Co.: McClintock, E., et al. (1990, pg. 102): NOTES: also observed as widely scattered plants on the Palisades, south shoulder of Mt. St. Helena in Napa Co. Thorny shrub to small tree, leaves 3--5-lobed halfway or more to midvein.
Initial Editorial Comments two records in SMASCH, but with notes not satisfying query that produced this checklist; "escaped from or persistent beyond cult, perhaps naturalized" according to The Jepson Manual [Ed. 1]; "definitely established elsewhere in East Bay Hills (e.g., Sibley Volcanic Park)" on yellow post-it by B. Ertter; BEN citation is No. 209, 24 Nov 1998; in no way mentioned in Munz; according to Source c, in California naturalized in wildlands, in NCoRO, SnFrB (24 Feb 2003)
Correspondence and Comments Subsequent to Initial Analysis
Correspondence 1 Treatment and author notes submitted for The Jepson Manual [Ed. 2] by James B. Phipps see Comment 1
Editorial Comments 1 Correspondence 1 confirms that for The Jepson Manual [Ed. 2] Crataegus monogyna Jacq. is to be treated as naturalized in CA.
Editorial Summary and Current Status
Editorial Summary addition, naturalized in CA
Current Status JFP-2, accepted name for taxon naturalized in CA
Current Status Authority The Jepson Manual [Ed. 2]
Current Status Date 26 Jan 2010
List of names for this Current Status category
List of ICPN names in Crataegus
List of names from ICPN, Hrusa's Crosswalk, and Jepson Flora in Crataegus

Resources of the Jepson Flora Project: External links:
·Distribution maps: County distribution based on CCH specimens
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link image ·Consortium of California Herbaria specimen records (includes links to BerkeleyMapper)
· Jepson eFlora page with bioregion map and CCH specimen records
Manual imageArchived Indexes from The Jepson Manual (1993; TJM1)
link image Jepson's "A Flora of California" (genus)
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