Vascular Plants of North Carolina
Account for Pear Hawthorn - Crataegus calpodendron   (Ehrhart) Medikus
Members of Rosaceae:
Members of Crataegus with account distribution info or public map:
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Section 6 » Order Rosales » Family Rosaceae
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Author(Ehrhart) Medikus
DistributionWidely scattered and poorly known, but known to occur at a handful of sites/counties in the Mountains and east to Durham and Wake counties.

This is a Midwestern and somewhat Northern species ranging east to NY, central NC, and central AL. Over most of its range in the eastern states, it has been confirmed by specimens in relatively few counties, perhaps to being overlooked.
AbundanceRare to uncommon, but poorly known and easily overlooked, despite being a long-known and described species. The NC NHP state rank of SH is now incorrect, as Lance (2014) shows recent photos from the NC Mountains and calls it uncommon in the state, and Weakley’s (2018) map shows that it is not rare (but uncommon) in the NC mountains and Piedmont. Also, Lance has identified a 2012 CVS specimen from Wake County as this species. Unlike with many other species of Crataegus that are poorly known and called "uncommon" by these authors, and which this website chooses to go with S3? as a state rank owing to being recently described, because this is a long-known species the website editors think that the scarcity of records is somewhat real and choose a rarer state rank of S2?. The editors suggest it be listed as a Watch List species.
HabitatThis is a species growing mainly in the forest shade, unlike most hawthorns. It favors mesic slopes, at times near creeks, ravines, and other reasonably shaded and semi-moist sites, particularly over high pH soils. The Wake plants grew in mafic soil on Adam Mountain.
See also Habitat Account for General Mesic Hardwood Forests
PhenologyBlooms in May and June, and fruits from September to October.
IdentificationThis is a small tree, to about 15 feet high, with often wide-spreading branches, yielding a crown that is usually wider than tall. The leaves are rather large for a hawthorn, often 3-3.5 inches long and nearly as wide. They are strongly serrate, widely elliptic to ovate, and most leaves have noticeable hairs on the surfaces and the petioles. The flowers are among the latest blooming of all NC Crataegus species; each inflorescence typically has at least 12 flowers. The Digital Atlas of the Virginia Flora states: “The pubescent leaves (below) and hairy, broadly compound inflorescences help to distinguish this species.” For additional characters, see Lance (2014) and Weakley (2018). As with most hawthorns, if you stumble onto this species, you likely will need to key it out on the spot, or snatch a twig and key it out later for identification.
Taxonomic CommentsThis is one of the few NC hawthorns that were included as a good species in RAB (1968). A few old references do list several varieties for it.

Other Common Name(s)Late Hawthorn
State RankSH [S2?]
Global RankG5
State Status[W7]
US Status
USACE-agcp
USACE-emp
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