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Quercus boyntonii (Boynton sand post oak)
Cressler, Alan

Quercus boyntonii

Quercus boyntonii Beadle

Boynton Sand Post Oak, Boynton Oak

Fagaceae (Beech Family)

Synonym(s): Quercus stellata var. boyntonii

USDA Symbol: QUBO2

USDA Native Status: L48 (N)

Boynton oak is a semi-evergreen deciduous or rhizomatous shrub, which grows to a height of 6-1/2 feet, occasionally to a height of 20 feet. BARK: brown and scaly. TWIGS and BUDS: light brown pubescent twigs; reddish-brown buds, ovoid with a rounded apex and sparsely pubescent scales. LEAVES: petiole up to 3/8 inch (10 mm) long; obovate or narrowly obovate leaves, up to 4 inches (101 mm) long and 2-3/8 inches (60 mm) wide, base is cuneate; margin with 3 - 5 irregularly rounded lobes; apex triangular-lobed; shiny dark green above, grayish pubescence beneath.

Boynton oak is rare and rated as endangered by the IUCN. The Texas distribution record is questionable and may have resulted from taxonomic confusion associated with early collections.


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Shrub , Tree
Leaf Retention: Deciduous , Semi-evergreen
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Obovate
Leaf Venation: Pinnate
Leaf Margin: Lobed
Leaf Base: Cuneate
Breeding System: Flowers Unisexual , Monoecious
Inflorescence: Catkin
Fruit Type: Nut
Size Notes: Up to about 20 feet tall, often much shorter.
Fruit: Acorns annual; 1 - 2 acorns on a peduncle up to 3/8 inch (10 mm) long, pubescent gray cup covers up to 1/2 of the nut; light brown, ovoid nut with rounded tip, up to 5/8 inch (16 mm) in length.

Bloom Information

Bloom Color: Green
Bloom Time: Mar , Apr , May


Native Distribution: Rare with a restricted occurrence in Alabama and Texas; found on the summit of Lookout Mountain, Etowah County, Alabama.
Native Habitat: Localized occurrence associated with sandstone outcrops.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Mt. Cuba Center - Hockessin, DE


Bibref 766 - Dale Groom's Texas Gardening Guide (2002) Groom, D.
Bibref 1134 - Field Guide to Native Oak Species of Eastern North America (2003) Stein, John D. and Denise Binion
Bibref 297 - Trees of Central Texas (1984) Vines, Robert A.

Search More Titles in Bibliography

Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Quercus boyntonii in USDA Plants
FNA: Find Quercus boyntonii in the Flora of North America (if available)
Google: Search Google for Quercus boyntonii


Record Modified: 2022-10-10
Research By: TWC Staff

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