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SAMO2632
» Citation URL: http://vegbank.org/cite/urn:lsid:vegtwig.vegbank.org:observation:4645-{1A87C047-754C-45B4-91BA-323C41C6BC57}
» Citing info
Plot ID Fields: 
Author Plot Code ? SAMO2632
Author Observation Code ? SAMO2632
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 ? 34.1703205916014 º
Longitude ? -118.673828815338 º
Author Location ? Upper Las Virgenes Open Space Preserve / Ahmanson
Location Narrative ? Unknown annual grasses appear to be Bromus hordeaceus and Lolium, too hard to separate now. Understory in middle of polygon is herbaceous. More Quercus agrifolia at west end. Baccharis pilularis rather pure at NE end, so treated as an inclusion.
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 ? large
Elevation ? 369 m
Slope Aspect ? 5 º
Min Slope Gradient ? 25 º
Topographic Position ? Middle to Upper 1/3 of slope
Surficial Deposits ? Unknown
Rock Type ? Unknown
Landscape Narrative ? Upland;
Percent Rock / Gravel ? 0 %
Percent Litter ? 0 %
Percent Bare Soil ? 0 %
Methods Fields: 
Observation Start Date ? 02-Dec-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 ? 0.25 m
Tree Cover ? 23 %
Shrub Cover ? 17 %
Field Cover ? 15 %
Nonvascular Cover ? 0 %
Misc Fields: 
Observation Narrative ? original plot ID: rap2632, 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 Artemisia californica Artemisia californica Less. Artemisia californica Artemisia californica **   ARCA11 Artemisia californica Less. Artemisia californica Artemisia californica **   ARCA11 Medium
16 %
        -none-
2 Hirschfeldia incana Hirschfeldia incana (L.) Lagr.-Foss. Hirschfeldia incana Hirschfeldia incana **   HIIN3 Hirschfeldia incana (L.) Lagr.-Foss. Hirschfeldia incana Hirschfeldia incana **   HIIN3 Medium
2 %
        -none-
3 Quercus agrifolia Quercus agrifolia Née Quercus agrifolia Quercus agrifolia **   QUAG Quercus agrifolia Née Quercus agrifolia Quercus agrifolia **   QUAG Medium
0.2 %
        -none-
4 Quercus lobata Quercus lobata Née Quercus lobata Quercus lobata **   QULO Quercus lobata Née Quercus lobata Quercus lobata **   QULO Medium
0.2 %
        -none-
5 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
0.2 %
        -none-
6 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
0.2 %
        -none-
7 Baccharis pilularis Baccharis pilularis DC. Baccharis pilularis Baccharis pilularis **   BAPI Baccharis pilularis DC. Baccharis pilularis Baccharis pilularis **   BAPI Medium
0.2 %
        -none-
8 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-
9 Graminoid (grass or grasslike) Unknown annual grass Graminoid (grass or grasslike) Unknown annual grass **   Liliopsida Monocotyledons Graminoid (grass or grasslike) Unknown annual grass **   Graminoid (grass or grasslike) Unknown annual grass **   Liliopsida Monocotyledons Graminoid (grass or grasslike) Unknown annual grass **   Low
11 %
        -none-
10 Lessingia filaginifolia Lessingia filaginifolia (Hook. & Arn.) M.A. Lane Lessingia filaginifolia Lessingia filaginifolia **   LEFI11 Lessingia filaginifolia (Hook. & Arn.) M.A. Lane Lessingia filaginifolia Lessingia filaginifolia **   LEFI11 Low
0.2 %
        -none-
11 Nassella Nassella (Trin.) Desv. Nassella Nassella **   NASSE Nassella (Trin.) Desv. Nassella Nassella **   NASSE Low
0.2 %
        -none-
12 Quercus lobata Quercus lobata Née Quercus lobata Quercus lobata **   QULO Quercus lobata Née Quercus lobata Quercus lobata **   QULO Tall
16 %
        -none-
13 Quercus agrifolia Quercus agrifolia Née Quercus agrifolia Quercus agrifolia **   QUAG Quercus agrifolia Née Quercus agrifolia Quercus agrifolia **   QUAG Tall
6 %
        -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 5 m 10 m 23 %
Tall 5 m    
Medium 0.5 m 5 m  
Low 0 m 0.5 m  
Low-Mid Shrub      
Low Tree-Tall Shrub 0.5 m 1 m  
This table is SORTABLE. Click the headers to sort ascending and descending.
Observation Contributors:
Party ?Role ?
Hohn, Charlie Field assistant
Christian, Julie Field assistant
Community Classification:
More Classification Start Date ? Community AssignmentsContributors
Details 01-Jun-2004
Community Concept ?Class Fit ?Class Confidence ?Community Authority Reference ?Typal ?
Quercus lobata – Quercus agrifolia / Grass Association     Keeler-Wolf and Evens 2006 no
Keeler-Wolf, Todd
Evens, Julie


Disturbance Data:
Disturbance Type ?Disturbance Intensity ?Disturbance Comment ?
Grazing Low not recent
Competition from exotics Medium Competition from exotics


User Defined Values
No User Defined Data for this plot