A Pin Oak in wet lowlands near the Patuxent River in Anne Arundel Co., Maryland (8/5/2012). Note deeply lobed leaves and lower branches drooping close to the ground.

Photo by Bill Hubick MBP List

A Pin Oak in Dorchester Co., Maryland (6/9/2018).

View Record Details Photo by Jim Brighton MBP List

Pin Oak in Anne Arundel Co., Maryland (4/16/2012).

View Record Details Photo by Bill Harms MBP List

Pin Oak staminate flowers in Kent Co., Maryland (4/12/2016).

View Record Details Photo by Nancy Martin MBP List

A Pin Oak in St. Mary's Co., Maryland (2/24/2013).

Photo by Bill Hubick MBP List

The bark of a Pin Oak at Sleepy Creek WMA, Berkeley Co., West Virginia (7/10/2012).

Photo by Jim Brighton MBP List

Pin Oak in Anne Arundel Co., Maryland (9/30/2017). (c) Bill Hubick, all rights reserved. (Photo ID: 775250 - Psn: 180)

View Record Details Photo by Bill Hubick MBP List

Map Snapshot

136 Records

GA AL WA FR CL MO HO BA BC HA CE PG AA CV CH SM KE QA CN TA DO WI SO WO

Status

Pin Oak grows from Vermont and Ontario, south to North Carolina, west to Oklahoma, and north to Wisconsin (Stein, et al., 2003). Found throughout Maryland in moist lowlands and poorly drained uplands. Care needs to be taken in differentiating between cultivated and wild material since Pin Oak is extensively planted as an ornamental in city and suburban landscapes.

Description

A medium to large tree with a short trunk and somewhat conical crown with horizontal inner branches and characteristic drooping lower branches. Leaves have 5-7 lobes, each with 1-3 bristle-tipped teeth, and the sinuses are deep. Acorns are small (nut 5/8-inch long), with a thin cup that covers 1/4 of the nut. Acorns are light brown and often striped.

Where To Find

Look on sites that are wet during the non-growing season but not flooded during the growing season. The drooping lower branches are an important field mark.

Relationships

Host plant to various moth species including American Dagger Moth (Database of World's Lepidopteran Host Plants).

Seasonality Summary

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Resources

View at iNaturalist Search Google Images Search MBP Facebook posts

View at Maryland Plant Atlas Search Flora of North America Search Mid-Atlantic Herbaria Consortium Search Norton-Brown Herbarium Search MNPS Facebook posts

Citations

No citations linked for this taxon yet.

Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.

A Pin Oak in wet lowlands near the Patuxent River in Anne Arundel Co., Maryland (8/5/2012). Note deeply lobed leaves and lower branches drooping close to the ground. Media by Bill Hubick.

A Pin Oak in Dorchester Co., Maryland (6/9/2018). View Record Details Media by Jim Brighton.

Pin Oak in Anne Arundel Co., Maryland (4/16/2012). View Record Details Media by Bill Harms.

Pin Oak staminate flowers in Kent Co., Maryland (4/12/2016). View Record Details Media by Nancy Martin.

A Pin Oak in St. Mary's Co., Maryland (2/24/2013). Media by Bill Hubick.

The bark of a Pin Oak at Sleepy Creek WMA, Berkeley Co., West Virginia (7/10/2012). Media by Jim Brighton.