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Wasowski, Sally and Andy
Quercus mohriana Buckl. ex Rydb.
Mohr oak, Shin oak, Scrub oak
USDA Symbol: qumo
USDA Native Status: Native to U.S.
Thicket-forming shrub or sometimes small tree with rounded crown, usually evergreen.
GROWTH FORM: evergreen
or deciduous shrub, rhizomatous and usually forming thickets, occasionally forms a small tree to 20 feet (6.1 m) with irregular spreading crown. BARK: thick gray bark with rough scaly ridges. TWIGS and BUDS: densely pubescent grayish-brown twigs, blunt ovoid buds with light brown to chestnut pubescent scales. LEAVES: short petiole to 1⁄4 inch (6 mm); thick
and leathery oblong to elliptical, 1 1⁄8 - 3 inches (29 - 76 mm) long, 3⁄4 - 1 1⁄4 inches (19 - 32 mm) wide, rounded base, apex rounded or acute, margin usually entire and wavy, may have a few teeth, shiny dark green above, grayish pubescence beneath with prominent raised secondary veins.
Named for botanist, Charles Mohr, who wrote about the flora of Alabama. The names Shin Oak and shinnery refer to the dense thickets, scarcely knee-high, of dwarf evergreen oaks of this and related species on uplands of western Texas and borders of adjacent states.
Plant CharacteristicsDuration: Perennial Habit: Shrub
, Tree Leaf Retention: Deciduous
, Evergreen Leaf Arrangement: Alternate Leaf Complexity: Simple Leaf Shape: Elliptic
, Oblong Leaf Venation: Pinnate Leaf Margin: Entire Leaf Apex: Acute Leaf Base:
Rounded Breeding System:
, Monoecious Inflorescence: Catkin Fruit Type: Nut Leaf:
Leaves shiny dark green above, grayish pubescence beneath with prominent raised secondary veins. Fruit:
Acorns annual; 1 - 2 acorns produced on a
peduncle to 5⁄8 inch (16 mm); deep cup with pubescent
enclosing 1⁄2 of nut; oval
to broadly elliptical, brown nut
to 5⁄8 inch (16 mm)
in length. Size Class:
Bloom InformationBloom Color: Red
Bloom Time: Mar , Apr , May
NM , OK , TX Native Distribution:
Oklahoma and New Mexico south to Texas and northern Mexico (Coahuila and Nuevo Leon). Native Habitat:
Limestone soils in the Lower ￼￼￼Sonoran Life Zone, at elevations between 2000 -
4000 feet (610 - 1219 m). USDA Native Status: L48(N)
Growing ConditionsWater Use: Low
Light Requirement: Part Shade
Soil Moisture: Dry
Soil Description: Caliche type, Sandy, Sandy Loam, Limestone-based, Medium Loam
Fire Resistant, Accent tree
or shrub Use Wildlife:
Nesting site, Cover, Substrate-insectivorous birds, Fruit-birds, Fruit-mammals. Mohr oak provides good habitat for wildlife. Interesting Foliage:
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Record Modified: 2011-09-28
Research By: TWC Staff