Burke: Crataegus monogyna vs. Crataegus monogyna var. monogyna

	Crataegus monogyna	Crataegus monogyna var. monogyna
	English hawthorn, one-seed hawthorn	common hawthorn, English hawthorn, one-seeded hawthorn
Habit		Glabrous, thorny, deciduous small shrub or tree, 2-10 m. tall. Thorns continue to grow as short thorn-tipped branches with leaves budding from the sides of the thorns.
Leaves		Leaves ovate, deeply 3-lobed more than halfway to the midrib, 2.5-5 cm. long and nearly as broad.
Flowers		Inflorescence a broad, dense, flat-topped cluster; flowers 8-15 mm. wide, the petals white; style 1.
Fruits		Fruit a crimson berry, globose, 7-10 mm. in diameter, with single large seed.

	Crataegus monogyna	Crataegus monogyna var. monogyna
Flowering time	April-June	April-June
Habitat	Roadsides, fields, pastures, meadows, thickets, and forest edge and understory at low elevations, often associated with disturbance. Seeds readily dispersed by birds.	Roadsides, fields, pastures, meadows, thickets, and forest edge and understory at low elevations, often associated with disturbance. Seeds readily dispersed by birds.
Distribution	Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to California, east to Montana, also in the Great Lakes region and eastern North America. [WildflowerSearch map] [BONAP county map]	Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to California, east to Montana, also in the Great Lakes region and eastern North America.
Origin	Introduced from Europe	Introduced from Eurasia and North Africa
Conservation status	Not of concern	Not of concern
Sibling taxa	C. castlegarensis, C. chrysocarpa, C. ×cogswellii, C. douglasii, C. gaylussacia, C. laevigata, C. macracantha, C. okanaganensis, C. okennonii, C. phaenopyrum, C. phippsii, C. tenuior
Subordinate taxa	C. monogyna var. monogyna
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Crataegus monogyna

Crataegus monogyna var. monogyna

English hawthorn, one-seed hawthorn

common hawthorn, English hawthorn, one-seeded hawthorn

Habit

Glabrous, thorny, deciduous small shrub or tree, 2-10 m. tall. Thorns continue to grow as short thorn-tipped branches with leaves budding from the sides of the thorns.

Leaves

Leaves ovate, deeply 3-lobed more than halfway to the midrib, 2.5-5 cm. long and nearly as broad.

Flowers

Inflorescence a broad, dense, flat-topped cluster;

flowers 8-15 mm. wide, the petals white;

style 1.

Fruits

Fruit a crimson berry, globose, 7-10 mm. in diameter, with single large seed.

Crataegus monogyna

Crataegus monogyna var. monogyna

Flowering time

April-June

Habitat

Roadsides, fields, pastures, meadows, thickets, and forest edge and understory at low elevations, often associated with disturbance. Seeds readily dispersed by birds.

Distribution

Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to California, east to Montana, also in the Great Lakes region and eastern North America.

[WildflowerSearch map]

[BONAP county map]

Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to California, east to Montana, also in the Great Lakes region and eastern North America.

Origin

Introduced from Europe

Introduced from Eurasia and North Africa

Conservation status

Not of concern

Sibling taxa