Nongame and Rare Species Program: Rare Plant Communities of Texas
Edwards Plateau: Grottoes and Seeps
Global Rank: G2
Description: This community consists of exposed limestone cliff faces and/or lower slopes in well-watered canyons of the Edwards Plateau region. Examples may include walls of grottoes formed by perennial or nearly perennial creeks or cliffs where seepage from exposed limestone consistently provides greater moisture than is available on adjacent slopes. Adiantum capillus-veneris is abundant on seepy cliff faces, while other consistent components such as Thelypteris ovata var. lindheimeri, Samolus valerandi ssp. parviflorus, and Dichanthelium acuminatum var. lindheimeri are usually more common on marly rubble at the foot of the same cliffs. These communities support rare and/or disjunct bryophyte species.
Species of Interest: Big Red Sage (Salvia penstemonoides), Canyon Mock-orange (Philadelphus ernestii), Chatterbox Orchid (Epipactis gigantea).