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Crataegus douglasii . Lindl
BLACK HAWTHORN
Crataegus columbiana

Life   Plantae   Dicotyledoneae   Rosaceae   Crataegus

Crataegus douglasii 1
© Copyright Idaho Taylor Wilderness Research Station 2011 · -9
Crataegus douglasii 1

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Links

Associates · map
FamilyScientific name @ source (records)
Cicadellidae  Balcanocerus provancheri @ AMNH_PBI (4)
Dermateaceae  Cylindrosporium brevispina @ BPI (7)

Cylindrosporium crataegi @ BPI (7)
Erysiphaceae  Phyllactinia corylea @ BPI (14)

Phyllactinia suffulta @ BPI (3)
Miridae  Blepharidopterus provancheri @ AMNH_PBI (1)

Lopidea ute @ AMNH_PBI (1); AMNH_ENT (2)

Malacocoris chlorizans @ AMNH_PBI (1)

Phytocoris dumicola @ AMNH_PBI (3)

Phytocoris relativus @ AMNH_PBI (2)

Pilophorus perplexus @ AMNH_PBI (4)

Pygovepres vaccinicola @ AMNH_PBI (8)
Mycosphaerellaceae  Septoria crataegi @ BPI (1)

Septoria @ BPI (2)
Pentatomidae  Banasa dimiata @ AMNH_PBI (3)
Polyporaceae  Fomes conchatus @ BPI (1)

Fomes fulvus @ BPI (1)

Fomes occidentalis @ BPI (8)

Polyporus versicolor @ BPI (2)
Pseudococcidae  Phenacoccus dearnessi @ CSCA_TCN (7)
Pucciniaceae  Gymnosporangium bethelii @ BPI (48)

Gymnosporangium blasdaleanum @ BPI (4)

Gymnosporangium clavariiforme @ BPI (1)

Gymnosporangium clavipes @ BPI (1)

Gymnosporangium germinale @ BPI (1)

Gymnosporangium globosum @ BPI (1)

Gymnosporangium libocedri @ BPI (21)

Gymnosporangium tubulatum @ 123246C (1); 123246A (1); BPI (61); 123246B (1)

Gymnosporangium @ BPI (3)
Stereaceae  Stereum patelliforme @ BPI (1)
Uropyxidaceae  Aecidium blasdaleanum @ BPI (1)
Valsaceae  Cytospora leucostoma @ BPI (3)

Valsa ambiens @ BPI (2)
Xylariaceae  Xylaria polymorpha @ BPI (1)
_  Cercoseptoria crataegi @ BPI (4)

Roestelia @ BPI (1)

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Shrub Species of the World's Boreal Forests

World Boreal Trees

GLOSSARIES
Terminology  |  Pictorial

   
Crataegus douglasii
Black Hawthorn
Rosaceae (Rose Family)

A shrub or small tree with compact, rounded crown of stout, spreading branches; growing to a heigh of 9 m and a diameter of 0.3 m, often forming thickets.

Description

Black Hawthorn Distinguishing Features - Leaves: 2.5 - 7.5 cm long; obovate to ovate, wider toward short-pointed tip, sharply saw-toothed and often slightly lobed; colouration: shiny dark green becoming nearly hairless above, paler underneath. Bark: gray to brown, smooth or becoming scaly. Twigs: shiny red, slender, hairless, often with straight or slightly curved spines 2.5 cm long. Flowers: 12 mm wide; with five white petals, 10 to 20 pink stamens, and 3 to 5 styles; on long, slender stalks in broad clusters; in spring. Fruit: 12 mm in diameter; turning shiny black, with thick, light yellow pulp and 3 to 5 nutlets; several on long stalks in drooping clusters; maturing late summer.

Habitat

Local in southern Alaska; from British Columbia south to central California; southwest to Saskatchewan; also local near Lake Superior; in moist soil conditions around mountain streams and valleys; with conifers.

Notes

The leaves of the Black Hawthorn provide browse for cattle and sheep; small birds and game birds eat the berries.

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