Monday, June 3 • 10:30am - 10:55am
Flora and Ecology of Powderhorn Ranch, A Prairie Landscape Endemic to the Coastal Bend of Texas LIMITED

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Limited Capacity seats available

Powderhorn Ranch Wildlife Management Area (~17,337 acres) is an extensive prairie landscape situated on the western shore of east Matagorda Bay, east shoreline of Powderhorn Lake and adjacent community of Port O’ Connor, Texas.  Powderhorn Ranch is positioned on the ‘Ingleside Sandsheet’, a remnant of ancient barrier island or strandplain system that faced the coast during a previous period of high sea level (about 50,000 to 75,000 years ago).  A strandplain is a mainland shoreline built seaward by a series of accumulated sandy beach ridges.  The Ingleside Sandsheet is also a prime area for development as these sand ridges are slightly higher than the surrounding landscape.  As a result, very few large tracts of Ingleside Sandsheet habitat remain.  Powderhorn Ranch is one of the larger remaining undeveloped tracts.  Powderhorn Ranch contains more than 500 species of plants which include many Texas endemic plants (found nowhere else but Texas) and a few globally rare plants such as seaside beebalm (Monarda maritima) and threeflower broomweed (Thurovia triflora).  Vegetation in the Ingleside depressions (ponds) is extremely unique and concentrated primarily on this sandsheet.  Powderhorn Ranch contains over 100 of the Ingleside depressional wetlands. One globally rare endemic (Isoetes texana) and several disjunct plants are restricted to these ponds. Eight plant communities have been documented and several globally rare types will be discussed which include Shore Little Bluestem – Pan American Balsamscale – Brownseed Paspalum – Gulfdune Paspalum (Seaside beebalm) Prairie; Coastal Bend Texas Live Oak - Redbay Forest; and Ingleside Freshwater Depressions.


Jason Singhurst

Texas Parks & Wildlife Department

Monday June 3, 2019 10:30am - 10:55am
Room 1218

Attendees (34)