Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Fagales
Genus: Quercus
Subgenus: Quercus
Section: Lobatae (red oaks)
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Quercus marilandica var. marilandica
FAMILY
Fagaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
You may also want to check Trees, Shrubs, and Woody Vines of North Carolina
Read Edible Wild Plants: Oak from Lytton Musselman and the Southern Appalachian Botanical Society.
Learn more from the Vascular Plants of North Carolina website.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Quercus marilandica var. marilandica
FAMILY
Fagaceae
INCLUDED WITHIN Flora of North America
Quercus marilandica
INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 055-03-024:
Quercus marilandica FAMILY Fagaceae
INCLUDED WITHIN Manual of the Southeastern Flora (Small, 1933, 1938)
Quercus marilandica
COMMON NAME:
Blackjack Oak
To see larger pictures, click or hover over the thumbnails.
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Manual of the Trees of North America (Exclusive of Mexico) (Sargent, 1905) mtna_i_290
)
JK Marlow jkm110219_677
February Spartanburg County SC
)
JK Marlow jkm0303h_21a
March Greenville County SC
)
JK Marlow jkm0303h_23a
March Greenville County SC
Oaks tend to have a cluster of buds at the ends of the twigs, per The Tree Identification Book (Symonds, 1958).
)
JK Marlow jkm130407_978
April Columbia County GA
Pistillate flowers with 3-lobed stigmas, solitary or in few-flowered spikes, per Native Trees of the Southeast, An Identification Guide (Kirkman, Brown, & Leopold, 2007).
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JK Marlow jkm130407_982
April Columbia County GA
Staminate flowers in pendulous catkins near base of current year's twig, per Native Trees of the Southeast, An Identification Guide (Kirkman, Brown, & Leopold, 2007).
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Richard and Teresa Ware rtw_quercus_marilandica
April
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JK Marlow jkm0405x_02
May Oconee County SC
Sumter National Forest: Andrew Pickens Ranger District
Leaves widest near the tip, which varies from unlobed to 3-lobed, per Woody Plants of the Blue Ridge (Lance).
)
Richard and Teresa Ware rtw_quercus_marilandica_3
July
Blackjack oak has been considered an indicator of ‘poor’ soil (from an agricultural perspective), per Weakley's Flora (2022).
)
Richard and Teresa Ware rtw_q_marilandica_leaves
September
)
Alan S. Weakley asw_10230304578614415
November
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Alan S. Weakley asw_10230304578934423
November
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JK Marlow jkm0411h_06
November Oconee County SC
Roadside
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JK Marlow jkm061113_002
November Greenville County SC
)
JK Marlow jkm061113_009
November Greenville County SC
Acorn cup thick, covering ~1/3 nut. Nut often with pronounced apical point, per Woody Plants of the Southeastern US: A Winter Guide (Lance, 2004).
)
JK Marlow s041223_a
December Oconee County SC
Roadside
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Quercus marilandica var. marilandica
FAMILY
Fagaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Quercus marilandica var. marilandica
FAMILY
Fagaceae
INCLUDED WITHIN
Flora of North America
Quercus marilandica
INCLUDED WITHIN
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 055-03-024:
Quercus marilandica
FAMILY
Fagaceae
INCLUDED WITHIN
Manual of the Southeastern Flora (Small, 1933, 1938)
Quercus marilandica
1190
Tree
Perennial
Monoecious
Habitat: Upland forests and woodlands, usually on periodically droughty soils, as over shrink-swell clays, sandstones, deep sands, sands with clay lenses, and shallow soils over acidic bedrock, per Weakley's Flora
Native to the Carolinas & Georgia
Common (uncommon in Mountains)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Deciduous
Simple
Alternate, 5-ranked
FLOWER:
Spring
Staminate calyx 2-8 lobed, pistillate calyx 6-lobed
Petals absent
3-12 stamens in staminate flowers
Unisexual
Staminate flowers in clustered drooping catkins
FRUIT:
Summer/Fall
Acorn
TO LEARN MORE about this plant, look it up in a good book!
- Guide to the Wildflowers of SC, 2nd ed. (McMillan, Porcher, Rayner, & White; 2022) p257
- Identifying Trees: An All-Season Guide to Eastern North America (Williams, 2007) p276
- Landscaping with Native Trees (Sternberg & Wilson, 1995) p220
- Field Guide to Native Oak Species of Eastern North America (Stein, Binion, & Acciavatti, 2003) p058
- Native Trees of the Southeast, An Identification Guide (Kirkman, Brown, & Leopold, 2007) p181
- Guide to the Plants of Granite Outcrops (Murdy & Carter, 2000) p41
- The Sibley Guide to Trees (Sibley, 2009) p193
- Trees of the Southeastern United States (Duncan & Duncan, 1988) p282
- Woody Plants of the Blue Ridge (Lance) p24
- Wildflowers & Plant Communities of the Southern Appalachian Mountains and Piedmont (Spira, 2011) p257
- Woody Plants of the Southeastern US: A Winter Guide (Lance, 2004) p274
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