Name:
Sporobolus clandestinus - Clinopodium arkansanum - Delphinium carolinianum Nepheline Syenite Bedrock Grassland Alliance
Reference:
NatureServe Biotics 2019
Description:
This distinctive vegetation represents glades and barrens found on nepheline syenite, a distinctive igneous rock present in the West Gulf Coastal Plain (and Ouachitas), restricted to the state of Arkansas. Some examples will have open stands of <i>Quercus stellata</i>, but trees may be absent. Some typical dominant grasses include <i>Aristida purpurascens, Piptochaetium avenaceum, Schizachyrium scoparium</i>, and <i>Sporobolus clandestinus</i>. Other herbs may include <i>Camassia scilloides, Clinopodium arkansanum, Delphinium carolinianum, Sabatia campestris</i>, and <i>Phemeranthus calycinus</i>. Lichens are common on the rocky substrate of some examples. Plant species that are common to both associations of this alliance include the forbs <i>Agalinis skinneriana, Allium cernuum, Chrysopsis pilosa, Coreopsis lanceolata, Digitaria cognata, Glandularia canadensis, Stenaria nigricans, Houstonia longifolia, Hypericum gentianoides, Hypericum punctatum, Hypoxis hirsuta, Krigia virginica, Liatris squarrosa var. hirsuta, Liatris squarrulosa, Manfreda virginica, Monarda fistulosa, Opuntia humifusa, Schizachyrium scoparium, Scleria ciliata, Sideroxylon lanuginosum, Yucca arkansana</i>, and the woody plants <i>Diospyros virginiana, Rhus copallinum</i> and <i>Ulmus alata</i>. Zonal vegetation communities are present around the outcrops. Interior herbaceous-dominated zones can be mesic to wet as springs and small ephemeral streams flow across the rock outcrops and water may pool in flat areas. Deeper, more heavily wooded vegetation develops along the flat or slightly sloping outcrop edges.
Accession Code:
urn:lsid:vegbank.org:commConcept:39304-{B3FD069E-69C1-43A4-91D7-E3A4AE7272F7}
Plot-observations of this Community Concept:
0
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