Quercus stellata
| Post oak | |
|---|---|
| File:Houston campsite oak.jpg | |
| The Houston Campsite oak in Grapevine Springs Preserve, Coppell, Texas | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Fagaceae |
| Genus: | Quercus |
| Subgenus: | Quercus subg. Quercus |
| Section: | Quercus sect. Quercus |
| Species: | Q. stellata
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| Binomial name | |
| Quercus stellata | |
| File:Quercus stellata range map 1.png | |
| Natural range of Quercus stellata | |
| Synonyms[2] | |
|
List
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Quercus stellata, the post oak or iron oak, is a North American species of oak in the white oak section. It is a slow-growing oak that lives in dry areas on the edges of fields, tops of ridges, and also grows in poor soils, and is resistant to rot, fire, and drought. Interbreeding occurs among white oaks, thus many hybrid species combinations occur. It is identifiable by the rounded cross-like shape formed by the leaf lobes and hairy underside of the leaves.
Taxonomy
[edit | edit source]The specific epithet stellata is Latin for "star";[3] it is named this because the trichome hairs on the bottom of the leaves are stellate[4] or star-shaped. Several variants of Q. stellata were named by American botanist Charles Sprague Sargent. The variety most recognised by the United States Forest Service is Q. stellata var. paludosa Sarg (delta post oak).[5]
Varieties
[edit | edit source]Varieties include:[6]
- var. margarettiae (Ashe) Sarg.
- var. paludosa Sarg.
- var. boyntonii (Beadle) Sarg.
- var. anomala Sarg.
- var. attenuata Sarg.
- var. araniosa Sarg.
- var. palmeri Sarg.
- var. parviloba Sarg.
- var. rufescens Sarg.
Hybrids
[edit | edit source]| Hybrid Name | Q. stellata x <sp.> |
|---|---|
| Q. × stelloides E. J. Palmer | Q . prinoides |
| Q. × mahloni E. J. Palmer | Q . sinuata var. breviloba |
| Q. × pseudomargaretta Trelease | Q . margaretta |
| Q. × sterretti Trelease | Q . lyrata |
| Q. × macnabiana Sudworth | Q . sinuata |
| Q. × guadalupensis Sargent | Q . macrocarpa |
| Q . × fernowi Trelease | Q . alba |
| Q. × bernardensis W. Wolf | Q . montana |
Description
[edit | edit source]
Post oak is a relatively small tree, typically 10–15 metres (33–49 feet) tall and trunk 30–60 centimetres (12–24 inches) in diameter, though occasional specimens reach 30 m (98 ft) tall and 140 cm (55 in) in diameter. The leaves have a very distinctive shape, with three perpendicular terminal lobes, shaped much like a Maltese cross. They are leathery, and tomentose (densely short-hairy) beneath. The branching pattern of this tree often gives it a rugged appearance. The acorns are 1.5–2 cm (5⁄8–3⁄4 in) long, and are mature in their first summer.[4]
Similar species
[edit | edit source]Both Quercus stellata and Q. alba are in a section of Quercus called the white oaks.[8] In the white oak section, Q. stellata is a sister taxon with Q. alba.[9] Q. stellata is sold and distributed as white oak. One identifiable difference between the two trees is that Q. stellata is 'hairy' on the underside of the leaf.[10]
Distribution and habitat
[edit | edit source]Q. stellata is found in the eastern and Midwestern United States both inland and along the coast, then in a narrow range along the eastern coast from Massachusetts to Florida, then westward to Texas, and inland to Iowa. Normally found at the edge of a forest, it typically grows in dry, sandy areas, deficient of nutrients.[10]
Ecology
[edit | edit source]Q. stellata has the ability to survive fires by having thicker bark. It is useful for fire surveys where the tree rings are used to get a fire history of an area. A tree ring survey of 36 trees in Illinois provided a 226-year tree ring record that indicated that many Q. stellata persisted through annual fire return intervals of 1.44 fires/year for over 100 years.[11]
It is used for food for deer, turkeys, squirrels, and other rodents, but because the nuts contain tannin, it is toxic to cattle.[5] A recent study in Kansas concluded that deer browsing reduces post-oak recruitment in canopy gaps generally in the sapling phase.[12]
Uses
[edit | edit source]Because of its ability to grow in dry sites, attractive crown, and strong horizontal branches, it is used in urban forestry. It is resistant to decay, so it is used for railroad ties, siding, planks, construction timbers, stair risers and treads, flooring, pulp, veneer, particle board, fuel, and its namesake fence posts.[5] It is one of the most common types of wood used for Central Texas barbecue.[citation needed]
References
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- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Stransky, John J. "Quercus stellata Wangenh.--post oak." Silvics of North America 2 (1990): 738–743.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ illustration from Histoire des arbres forestiers de l'Amérique septentrionale, considérés principalement sous les rapports de leur usages dans les arts et de leur introduction dans le commerce ... Par F.s André-Michaux. Paris, L. Haussmann,1812-13. François André Michaux (book author), Pierre-Joseph Redouté (illustrator), Renard (engraver)
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- ^ a b Stein, John D., Denise Binion, and R. E. Acciavatti. "Field guide to native oak species of eastern North America." (2003): 96-97.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Cory, B. J., & Leland Russell, F. (2022). Deer browsing and light availability limit post oak (Quercus stellata) sapling growth and post-fire recovery in a xeric woodland. Forest Ecology and Management, 519, 120346-. https://doi.org/10.1016/j.foreco.2022.120346
External links
[edit | edit source]- IPNI
- Kew
- Flora of North America
- Plants.USDA.gov
- US Forest Service
- Flora of the Southern and Mid-Atlantic States Archived 2018-10-06 at the Wayback Machine
- Q. stellata images from Vanderbilt University Archived 2013-06-17 at the Wayback Machine
- photo of herbarium specimen at Missouri Botanical Garden, collected in Missouri in 1939
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