UW Burke Herbarium species comparison

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Crataegus douglasii

Crataegus pinetorum

black hawthorn, Douglas's hawthorn
Habit Large shrubs or small trees, 1-6 m. tall, armed with stout, straight thorns 1-2 cm. long.
Leaves

Leaf blades obovate, tapered to the petiole, 3-6 cm. long and nearly as broad, weakly lobed, pubescent to glabrous on both surfaces.

Flowers

Flowers few in the leaf axils or terminal;

calyx bell-shaped, the 5 lobes triangular, entire, reflexed, 1.5-2.5 mm. long;

petals 5, white, orbicular, 5-7 mm. long;

stamens 10, styles 5.

Fruits

Berry blackish, glabrous, about 1 cm. long.

Crataegus douglasii

Crataegus pinetorum
Flowering time May-June
Habitat Thickets, open forests, forest edges, and riparian zones, from lowlands to middle elevations.
Distribution
Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Saskatchewan, Idaho and Montana, also in the Great Lakes region.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
C. castlegarensis, C. chrysocarpa, C. ×cogswellii, C. gaylussacia, C. laevigata, C. macracantha, C. monogyna, C. okanaganensis, C. okennonii, C. phaenopyrum, C. phippsii, C. tenuior
C. castlegarensis, C. chrysocarpa, C. ×cogswellii, C. douglasii, C. gaylussacia, C. laevigata, C. macracantha, C. monogyna, C. okanaganensis, C. okennonii, C. phaenopyrum, C. phippsii, C. tenuior
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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