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SAMO1852
» Citation URL: http://vegbank.org/cite/urn:lsid:vegtwig.vegbank.org:observation:3865-{2AFA5D7A-6C6B-43B4-ADCC-D7D12FB4EA00}
» Citing info
Plot ID Fields: 
Author Plot Code ? SAMO1852
Author Observation Code ? SAMO1852
Original Data Location ? SAMO NPS Headquarters, 401 West Hillcrest Drive, Thousand Oaks, CA
Location Fields: MAP: Google | Yahoo | TopoZone | MapQuest
Confidentiality Status ? exact location
Latitude ? 34.1793768995783 º
Longitude ? -118.71347921107 º
Author Location ? Upper Las Virgenes Open Space Preserve / Ahmanson
Location Narrative ? Understory of polygon is dominated by Galium aparine. Polygon within drainage. Unknown plant matting beneath canopy accounts for 1% of cover.
State or Province ? California
Country ? United States
Named Places
region|state|province: California
area|country|territory: United States
Layout Fields: 
Shape ? Plotless
Placement Method ? Representative
Permanence ? not permanent
Environment Fields: 
Stand Size ? small
Elevation ? 331 m
Slope Aspect ? 10 º
Min Slope Gradient ? 25 º
Topographic Position ? Middle 1/3 of slope
Surficial Deposits ? Sedimentary (type unknown)
Rock Type ? Sedimentary (type unknown)
Landscape Narrative ? Upland;
Percent Rock / Gravel ? 10.2 %
Percent Litter ? 45 %
Percent Bare Soil ? 35 %
Methods Fields: 
Observation Start Date ? 11-Jun-2003 ± exact
Date Accuracy ? exact
Project ? SAMO (CNPS Rapid Assessment/Releve 2002)
Cover Method ? Percentage (%)
Stratum Method ? CA Native Plant Society (CNPS)
Cover Dispersion ? Entire
Overall Taxon Cover Values are Automatically Calculated? ? no
Plot Quality Fields: 
Plot Validation Level ? (1) occurrence plot: sufficient for determining type occurrence
Overall Plot Vegetation Fields: 
Field Height ? 0.75 m
Tree Cover ? 0 %
Shrub Cover ? 51 %
Field Cover ? 12 %
Nonvascular Cover ? 0 %
Misc Fields: 
Observation Narrative ? original plot ID: rap1852, Vegetation type confidence High;
Taxa occurring on this plot-observation
Change plant label:
Change Strata Shown:
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 Sambucus mexicana Sambucus mexicana C. Presl ex DC. Sambucus mexicana Sambucus mexicana **   SAME5 Sambucus mexicana C. Presl ex DC. Sambucus mexicana Sambucus mexicana **   SAME5 Medium
50 %
        -none-
2 Brassica nigra Brassica nigra (L.) W.D.J. Koch Brassica nigra Brassica nigra **   BRNI Brassica nigra (L.) W.D.J. Koch Brassica nigra Brassica nigra **   BRNI Medium
1 %
        -none-
3 Leymus condensatus Leymus condensatus (J. Presl) A. Löve Leymus condensatus Leymus condensatus **   LECO12 Leymus condensatus (J. Presl) A. Löve Leymus condensatus Leymus condensatus **   LECO12 Medium
1 %
        -none-
4 Hazardia squarrosa Hazardia squarrosa (Hook. & Arn.) Greene Hazardia squarrosa Hazardia squarrosa **   HASQ2 Hazardia squarrosa (Hook. & Arn.) Greene Hazardia squarrosa Hazardia squarrosa **   HASQ2 Medium
0.2 %
        -none-
5 Sonchus oleraceus Sonchus oleraceus L. Sonchus oleraceus Sonchus oleraceus **   SOOL Sonchus oleraceus L. Sonchus oleraceus Sonchus oleraceus **   SOOL Medium
0.2 %
        -none-
6 Sanicula arguta Sanicula arguta Greene ex J.M. Coult. & Rose Sanicula arguta Sanicula arguta **   SAAR10 Sanicula arguta Greene ex J.M. Coult. & Rose Sanicula arguta Sanicula arguta **   SAAR10 Medium
0.2 %
        -none-
7 Lactuca serriola Lactuca serriola L. Lactuca serriola Lactuca serriola **   LASE Lactuca serriola L. Lactuca serriola Lactuca serriola **   LASE Medium
0.2 %
        -none-
8 Silybum marianum Silybum marianum (L.) Gaertn. Silybum marianum Silybum marianum **   SIMA3 Silybum marianum (L.) Gaertn. Silybum marianum Silybum marianum **   SIMA3 Medium
0.2 %
        -none-
9 Malacothrix saxatilis Malacothrix saxatilis (Nutt.) Torr. & A. Gray Malacothrix saxatilis Malacothrix saxatilis **   MASA2 Malacothrix saxatilis (Nutt.) Torr. & A. Gray Malacothrix saxatilis Malacothrix saxatilis **   MASA2 Medium
0.2 %
        -none-
10 Galium aparine Galium aparine L. Galium aparine Galium aparine **   GAAP2 Galium aparine L. Galium aparine Galium aparine **   GAAP2 Low
5 %
        -none-
11 Claytonia perfoliata Claytonia perfoliata Donn ex Willd. Claytonia perfoliata Claytonia perfoliata **   CLPE Claytonia perfoliata Donn ex Willd. Claytonia perfoliata Claytonia perfoliata **   CLPE Low
2 %
        -none-
12 Marah macrocarpus Marah macrocarpus (Greene) Greene Marah macrocarpus Marah macrocarpus **   MAMA8 Marah macrocarpus (Greene) Greene Marah macrocarpus Marah macrocarpus **   MAMA8 Low
1 %
        -none-
13 Marrubium vulgare Marrubium vulgare L. Marrubium vulgare Marrubium vulgare **   MAVU Marrubium vulgare L. Marrubium vulgare Marrubium vulgare **   MAVU Low
0.2 %
        -none-
This table is SORTABLE. Click the headers to sort ascending and descending.

Stratum Definitions:
Stratum Type ?Stratum Base ?Stratum Height ?Stratum Cover ?
conifer tree     0 %
hardwood tree     0 %
Medium 0.5 m 5 m  
Low 0 m 0.5 m  
Low-Mid Shrub      
Low Tree-Tall Shrub 2 m 5 m  
This table is SORTABLE. Click the headers to sort ascending and descending.
Observation Contributors:
Party ?Role ?
McGraw, Mike Field assistant
Community Classification:
More Classification Start Date ? Community AssignmentsContributors
Details 01-Jun-2004
Community Concept ?Class Fit ?Class Confidence ?Community Authority Reference ?Typal ?
Sambucus nigra ssp. cerulea / Leymus condensatus - Annual Grass-Herb Wet Shrubland     Keeler-Wolf and Evens 2006 no
Keeler-Wolf, Todd
Evens, Julie


Disturbance Data:
Disturbance Type ?Disturbance Intensity ?Disturbance Comment ?
Competition from exotics Medium Competition from exotics


User Defined Values
No User Defined Data for this plot