085-FAIR-0004
» Citation URL: http://vegbank.org/cite/urn:lsid:cvs.bio.unc.edu:observation:13364-{37E493DD-A076-4219-A04D-A2AC0566CC6B} » Citing info
Plot ID Fields:
Author Plot Code	085-FAIR-0004
Author Observation Code	085-FAIR-0004
Location Fields:	MAP: Google | Yahoo | TopoZone | MapQuest
Location Accuracy	25 m
Confidentiality Status	100 km radius (nearest degree)
Latitude	39 º
Longitude	-77 º
State or Province	Virginia
Named Places	county: Fairfax county: Fairfax region|state|province: Virginia
Layout Fields:
DSG Polygon	8 x 12.5 m
Area	100 m²
Permanence	not permanent
Environment Fields:
Elevation	89 m
Slope Aspect	(n/a, flat) º
Slope Gradient	3 º
Topographic Position	crest/interfluve
Landform	rolling/dissected upland
Hydrologic Regime	terrestrial (upland)
Soil Moisture Regime	xeric
Soil Drainage	rapidly drained
Methods Fields:
Observation Start Date	11-Jun-2003
Observation End Date	11-Jun-2003
Project	Virginia Heritage
Cover Method	Carolina Vegetation Survey
Stratum Method	No Strata
Method Narrative	Releve Virginia Division of Natural Heritage, see http://www.dcr.virginia.gov/natural_heritage/documents/nh_plotform_instructions.pdf
Overall Taxon Cover Values are Automatically Calculated?	no
Plot Quality Fields:
Plot Validation Level	(2) classification plot: sufficient for inclusion in a classification revision
Overall Plot Vegetation Fields:
Field Height	5 m
Field Cover	20 %
Nonvascular Cover	50 %
Misc Fields:
Observation Narrative	An impressive but very disturbed "flatrock" of Triassic diabase, located on a small hill or knob by Elklick Run in the Culpeper Basin of Fairfax County. The west end of the outcrop was quarried long ago; although the main portion remained unaltered, it must have been heavily impacted by equipment and trampling during the quarrying operation. Later this area was used for grazing livestock, which had unrestricted access to the flatrock. As a result, this habitat has probably lost much of its native perennial flora, and now supports a weedy mix of mostly annual natives and exotics. Some characteristic plants of mafic barrens are present (e.g., Polygonum tenue, Isanthus brachiatus, Bulbostylis capillaris, Cyperus lupulinus, Krigia virginica) but others (e.g., Talinum teretifolium, Opuntia humifusa) are conspicuously absent. Plants are rooted in cracks, crevices, moss mats, and superficial mats of humus. No mineral soil could be located in this habitat.

Taxa occurring on this plot-observation
Change plant label: --Choose a value-- Author's plant name Original Interpretation, full Scientific Name Original Interpretation, Scientific Name without authors Original Interpretation, USDA Code Original Interpretation, Common Name Current Interpretation, full Scientific Name Current Interpretation, Scientific Name without authors Current Interpretation, USDA Code Current Interpretation, Common Name
Change Strata Shown: --choose one-- show strata (no strata on this plot) show overall cover show strata + overall
ord Author Plant Name Original Interpretation, full Scientific Name Original Interpretation, Scientific Name without authors Original Interpretation, Common Name Original Interpretation, USDA Code Current Interpretation, full Scientific Name Current Interpretation, Scientific Name without authors Current Interpretation, Common Name Current Interpretation, USDA Code Stratum Cover Original Cover Code Basal Area Biomass Inference Area Stems: Stem Diameters (graphically): 1 Krigia virginica Krigia virginica **   Krigia virginica **   Krigia virginica **   Krigia virginica **   Krigia virginica **   Krigia virginica **   Krigia virginica **   Krigia virginica **   -all-   7.5 % 5       -none- 2 Diodia teres Diodia teres **   Diodia teres **   Diodia teres **   Diodia teres **   Diodia teres **   Diodia teres **   Diodia teres **   Diodia teres **   -all-   3.5 % 4       -none- 3 Plantago aristata Plantago aristata **   Plantago aristata **   Plantago aristata **   Plantago aristata **   Plantago aristata **   Plantago aristata **   Plantago aristata **   Plantago aristata **   -all-   1.5 % 3       -none- 4 Bulbostylis capillaris Bulbostylis capillaris **   Bulbostylis capillaris **   Bulbostylis capillaris **   Bulbostylis capillaris **   Bulbostylis capillaris **   Bulbostylis capillaris **   Bulbostylis capillaris **   Bulbostylis capillaris **   -all-   1.5 % 3       -none- 5 Danthonia spicata Danthonia spicata **   Danthonia spicata **   Danthonia spicata **   Danthonia spicata **   Danthonia spicata **   Danthonia spicata **   Danthonia spicata **   Danthonia spicata **   -all-   1.5 % 3       -none- 6 Rumex acetosella Rumex acetosella **   Rumex acetosella **   Rumex acetosella **   Rumex acetosella **   Rumex acetosella **   Rumex acetosella **   Rumex acetosella **   Rumex acetosella **   -all-   0.505 % 2       -none- 7 Trichostema brachiatum Trichostema brachiatum **   Trichostema brachiatum **   Trichostema brachiatum **   Trichostema brachiatum **   Trichostema brachiatum **   Trichostema brachiatum **   Trichostema brachiatum **   Trichostema brachiatum **   -all-   0.505 % 2       -none- 8 Polygonum tenue Polygonum tenue **   Polygonum tenue **   Polygonum tenue **   Polygonum tenue **   Polygonum tenue **   Polygonum tenue **   Polygonum tenue **   Polygonum tenue **   -all-   0.505 % 2       -none- 9 Fraxinus americana Fraxinus americana **   Fraxinus americana **   Fraxinus americana **   Fraxinus americana **   Fraxinus americana **   Fraxinus americana **   Fraxinus americana **   Fraxinus americana **   -all-   0.505 % 2       -none- 10 Plantago lanceolata Plantago lanceolata **   Plantago lanceolata **   Plantago lanceolata **   Plantago lanceolata **   Plantago lanceolata **   Plantago lanceolata **   Plantago lanceolata **   Plantago lanceolata **   -all-   0.505 % 2       -none- 11 Rubus flagellaris Rubus flagellaris **   Rubus flagellaris **   Rubus flagellaris **   Rubus flagellaris **   Rubus flagellaris **   Rubus flagellaris **   Rubus flagellaris **   Rubus flagellaris **   -all-   0.505 % 2       -none- 12 Cerastium glomeratum Cerastium glomeratum **   Cerastium glomeratum **   Cerastium glomeratum **   Cerastium glomeratum **   Cerastium glomeratum **   Cerastium glomeratum **   Cerastium glomeratum **   Cerastium glomeratum **   -all-   0.505 % 2       -none- 13 Leucanthemum vulgare Leucanthemum vulgare **   Leucanthemum vulgare **   Leucanthemum vulgare **   Leucanthemum vulgare **   Leucanthemum vulgare **   Leucanthemum vulgare **   Leucanthemum vulgare **   Leucanthemum vulgare **   -all-   0.505 % 2       -none- 14 Veronica arvensis Veronica arvensis **   Veronica arvensis **   Veronica arvensis **   Veronica arvensis **   Veronica arvensis **   Veronica arvensis **   Veronica arvensis **   Veronica arvensis **   -all-   0.505 % 2       -none- 15 Erigeron annuus Erigeron annuus **   Erigeron annuus **   Erigeron annuus **   Erigeron annuus **   Erigeron annuus **   Erigeron annuus **   Erigeron annuus **   Erigeron annuus **   -all-   0.505 % 2       -none- 16 Silene antirrhina Silene antirrhina **   Silene antirrhina **   Silene antirrhina **   Silene antirrhina **   Silene antirrhina **   Silene antirrhina **   Silene antirrhina **   Silene antirrhina **   -all-   0.505 % 2       -none- 17 Ambrosia artemisiifolia Ambrosia artemisiifolia **   Ambrosia artemisiifolia **   Ambrosia artemisiifolia **   Ambrosia artemisiifolia **   Ambrosia artemisiifolia **   Ambrosia artemisiifolia **   Ambrosia artemisiifolia **   Ambrosia artemisiifolia **   -all-   0.505 % 2       -none- 18 Micranthes virginiensis Micranthes virginiensis **   Micranthes virginiensis **   Micranthes virginiensis **   Micranthes virginiensis **   Micranthes virginiensis **   Micranthes virginiensis **   Micranthes virginiensis **   Micranthes virginiensis **   -all-   0.505 % 2       -none- 19 Hedeoma pulegioides Hedeoma pulegioides **   Hedeoma pulegioides **   Hedeoma pulegioides **   Hedeoma pulegioides **   Hedeoma pulegioides **   Hedeoma pulegioides **   Hedeoma pulegioides **   Hedeoma pulegioides **   -all-   0.505 % 2       -none- 20 Dichanthelium acuminatum Dichanthelium acuminatum **   Dichanthelium acuminatum **   Dichanthelium acuminatum **   Dichanthelium acuminatum **   Dichanthelium acuminatum **   Dichanthelium acuminatum **   Dichanthelium acuminatum **   Dichanthelium acuminatum **   -all-   0.505 % 2       -none- 21 Lepidium virginicum Lepidium virginicum **   Lepidium virginicum **   Lepidium virginicum **   Lepidium virginicum **   Lepidium virginicum **   Lepidium virginicum **   Lepidium virginicum **   Lepidium virginicum **   -all-   0.505 % 2       -none- 22 Toxicodendron radicans Toxicodendron radicans **   Toxicodendron radicans **   Toxicodendron radicans **   Toxicodendron radicans **   Toxicodendron radicans **   Toxicodendron radicans **   Toxicodendron radicans **   Toxicodendron radicans **   -all-   0.505 % 2       -none- 23 Potentilla canadensis var. canadensis Potentilla canadensis var. canadensis **   Potentilla canadensis var. canadensis **   Potentilla canadensis var. canadensis **   Potentilla canadensis var. canadensis **   Potentilla canadensis var. canadensis **   Potentilla canadensis var. canadensis **   Potentilla canadensis var. canadensis **   Potentilla canadensis var. canadensis **   -all-   0.505 % 2       -none- 24 Cyperus lupulinus Cyperus lupulinus **   Cyperus lupulinus **   Cyperus lupulinus **   Cyperus lupulinus **   Cyperus lupulinus **   Cyperus lupulinus **   Cyperus lupulinus **   Cyperus lupulinus **   -all-   0.505 % 2       -none- 25 Bidens aristosa Bidens aristosa **   Bidens aristosa **   Bidens aristosa **   Bidens aristosa **   Bidens aristosa **   Bidens aristosa **   Bidens aristosa **   Bidens aristosa **   -all-   0.505 % 2       -none- 26 Trifolium arvense Trifolium arvense **   Trifolium arvense **   Trifolium arvense **   Trifolium arvense **   Trifolium arvense **   Trifolium arvense **   Trifolium arvense **   Trifolium arvense **   -all-   0.505 % 2       -none- 27 Plantago virginica Plantago virginica **   Plantago virginica **   Plantago virginica **   Plantago virginica **   Plantago virginica **   Plantago virginica **   Plantago virginica **   Plantago virginica **   -all-   0.505 % 2       -none- 28 Celtis tenuifolia Celtis tenuifolia **   Celtis tenuifolia **   Celtis tenuifolia **   Celtis tenuifolia **   Celtis tenuifolia **   Celtis tenuifolia **   Celtis tenuifolia **   Celtis tenuifolia **   -all-   0.505 % 2       -none- 29 Bromus racemosus Bromus racemosus **   Bromus racemosus **   Bromus racemosus **   Bromus racemosus **   Bromus racemosus **   Bromus racemosus **   Bromus racemosus **   Bromus racemosus **   -all-   0.505 % 2       -none- 30 Juniperus virginiana var. virginiana Juniperus virginiana var. virginiana **   Juniperus virginiana var. virginiana **   Juniperus virginiana var. virginiana **   Juniperus virginiana var. virginiana **   Juniperus virginiana var. virginiana **   Juniperus virginiana var. virginiana **   Juniperus virginiana var. virginiana **   Juniperus virginiana var. virginiana **   -all-   0.505 % 2       -none- 31 Oxalis dillenii Oxalis dillenii **   Oxalis dillenii **   Oxalis dillenii **   Oxalis dillenii **   Oxalis dillenii **   Oxalis dillenii **   Oxalis dillenii **   Oxalis dillenii **   -all-   0.05 % 1       -none- 32 Allium vineale Allium vineale **   Allium vineale **   Allium vineale **   Allium vineale **   Allium vineale **   Allium vineale **   Allium vineale **   Allium vineale **   -all-   0.05 % 1       -none- 33 Persicaria longiseta Persicaria longiseta **   Persicaria longiseta **   Persicaria longiseta **   Persicaria longiseta **   Persicaria longiseta **   Persicaria longiseta **   Persicaria longiseta **   Persicaria longiseta **   -all-   0.05 % 1       -none- 34 Fallopia cristata Fallopia cristata **   Fallopia cristata **   Fallopia cristata **   Fallopia cristata **   Fallopia cristata **   Fallopia cristata **   Fallopia cristata **   Fallopia cristata **   -all-   0.05 % 1       -none-
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Stratum Definitions:
Sorry, no Stratum Definitions found.
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