Sadler Oak
Quercus sadleriana
Fagaceae · broadleaf deciduous shrub · native
Last updated
Data Maturity Structured
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Quercus sadleriana (Fagaceae) is a low, evergreen shrub native to the Klamath Mountains of southwestern Oregon and northwestern California. It grows only about 6 feet tall, making it the smallest oak in its range. The chestnut-like leaves are distinctive for an oak.
Sadler oak inhabits cool, moist, high-elevation sites on north-facing slopes. It is rare in the nursery trade but occasionally grown by native plant enthusiasts. The species' restricted range and specific habitat requirements make it of conservation interest. Hardy in Zones 5a to 8b.
Quick Facts
Height
6 ft
Light
Full Sun to Shade
Hardiness
Zone Zones 5a–8b
Origin
Pacific Northwest native
Diseases (14)
Ramorum Blight (Sudden Oak Death) Mistletoe abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Armillaria ostoyae Armillaria Root Rot Discula destructiva (dogwood), Kabatiella and Discula spp... Anthracnose Cytospora spp. (Valsa spp., Leucostoma spp.) Cytospora Canker Microstroma album Frosty Mildew Ganoderma applanatum Ganoderma Root and Butt Rot Pseudoinonotus dryadeus Inonotus Root and Butt Rot Taphrina spp. Leaf Blister Phoradendron villosum Mistletoe (a True Mistletoe) Neonectria ditissima Nectria Canker Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Inonotus dryophilus White Pocket Rot (Piped Rot)
Pests (14)
Looper Stem Gall Asterolecanium spp. Pit scale Platycotis vittata Oak Treehoppers Bucculatrix albertiella Oak Ribbed Casemaker Phylloxera spp. Oak leaf phylloxera Various (Cynipidae, Cecidomyiidae, Eriophyidae, Psyllidae) Leaf galls Neuroterus saltatorius Jumping Oak Gall Andricus quercuscalifornicus California Gallfly Prionoxystus robiniae Carpenterworm Oak gall wasp Bucculatrix ainsliella Oak skeletonizer Edwardsiana rosae Rose leafhopper Various (Cynipidae, Cecidomyiidae, Eriophyidae) Leaf and twig gall