Hoyt Arboretum, Portland, Oregon, USA
Hoyt Arboretum, Portland, Oregon, USA
Hoyt Arboretum, Portland, Oregon, USA
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Taxon
Notholithocarpus densiflorus
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Common name:
Tanbark Oak, tanoak, tanoak, tanoak
Family:
Fagaceae
Synonym:
Lithocarpus densiflorus, Lithocarpus densiflorus var. densiflorus, Notholithocarpus densiflorus var. densiflorus
Distribution:
southwest Oregon to southern California
Habitat:
Mixed evergreen forest near coastal range
IUCN Red list:
Least concern
Hardiness:
Zone 7b 5 to 10 F
Life form:
Broadleaf evergreen tree
Usage:
Ornamental shade tree
Comments:
Tanoak is a broadleaf evergreen tree, 20-30’ tall, varying from narrow and conical to broad and rounded. Leaves, alternate, oblong, 6-13 cm long, 2-6 cm wide, thick, leathery, wavy-toothed border, shiny light green, whitish beneath, margin coarsely toothed to entire, often rolled under. Flowers are unisexual, male flowers are in catkins 5-10 cm long, white but turning rust colored, with an unpleasant odor; greenish-yellow female flowers, resembling chinkapin flowers, are found at the base of catkins. Fruit, oak-like acorns, are egg-shaped, 2-3 cm long, shallow saucer-shaped cup, covered with dense bristles; mature in the second year.
Best grown in full sun to part shade to full shade in rich, moist soil. Moderately drought tolerant.
Links:
Flora of North America on line
•
OSU Landscape Plants - Notholithocarpus densiflorus
•
The Plant List, a working list of all plant species
•
Flora of North America on line
Locations
1:
1325 s, 1000 e
(ST 1325,1000)
• Accession: 1998-136/1
2:
1325 s, 1000 e
(ST 1325,1000)
• Accession: 1998-137/1
3:
1325 s, 1000 e
(ST 1325,1000)
• Accession: 1998-138/1
4:
1325 s, 1000 e
(ST 1325,1000)
• Accession: 1998-139/1
5:
1325 s, 1000 e
(ST 1325,1000)
• Accession: 1998-140/1
6:
1325 s, 1000 e
(ST 1325,1000)
• Accession: 1998-141/1
7:
1325 s, 1000 e
(ST 1325,1000)
• Accession: 1998-166/1
8:
1600 s, 1000 e
(ST 1600,1000)
• Accession: 1999-152/1
9:
1600 s, 1000 e
(ST 1600,1000)
• Accession: 1999-165/1
10:
1600 s, 1000 e
(ST 1600,1000)
• Accession: 2001-222/2 • Origin: United States of America
11:
600 s, 1200 e
(ST 600,1200)
• Accession: 1946-918/1
12:
600 s, 1200 e
(ST 600,1200)
• Accession: 1946-919/1
13:
600 s, 1200 e
(ST 600,1200)
• Accession: 1946-920/1
14:
600 s, 1200 e
(ST 600,1200)
• Accession: 1968-005/1
15:
700 s, 1200 e
(ST 700,1200)
• Accession: 1946-988/1
16:
Herbarium
(HERB)
• Accession: 1946-918
17:
Herbarium
(HERB)
• Accession: 1946-919
Area
Individual