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SAMO2917
» Citation URL: http://vegbank.org/cite/urn:lsid:vegtwig.vegbank.org:observation:4932-{2F5BD413-2CAC-4F87-9AA0-DB9C6CECAA07}
» Citing info
Plot ID Fields: 
Author Plot Code ? SAMO2917
Author Observation Code ? SAMO2917
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 ? 34.2190702357909 º
Longitude ? -118.929716197673 º
Author Location ? Conejo Canyons - Rancho Conejo Open Space - City
Location Narrative ? Igneous rocks in vicinity of polygon but none within it.
State or Province ? California
Country ? United States
Named Places
region|state|province: California
area|country|territory: United States
Layout Fields: 
Shape ? Square
Area ? 100
Placement Method ? Representative
Permanence ? not permanent
Layout Narrative ? Length: 10; Width: 10
Environment Fields: 
Stand Size ? large
Elevation ? 77 m
Slope Aspect ? (n/a, flat) º
Min Slope Gradient ? 1 º
Max Slope Gradient ? 5 º
Topographic Position ? Lower 1/3 of slope
Landscape Narrative ? Upland; Description of the plot in relation to the rest of the stand: Polygon is a mixing of non-native annual grasses and herbs. The plot captures an area with a good distribution with the three main non-natives, Brassica nigra, Bromus diandrus , and Centaurea melitensis. Artemisia californica spotted through polygon.
Percent Rock / Gravel ? 0.2 %
Percent Litter ? 60 %
Percent Bare Soil ? 37 %
Methods Fields: 
Observation Start Date ? 12-May-2003 ± exact
Date Accuracy ? exact
Project ? SAMO (CNPS Rapid Assessment/Releve 2002)
Cover Method ? Percentage (%)
Stratum Method ? CA Native Plant Society (CNPS)
Taxon Observation Area ? 100
Cover Dispersion ? Entire
Overall Taxon Cover Values are Automatically Calculated? ? no
Stem Observation Area ? 100
Plot Quality Fields: 
Plot Validation Level ? (2) classification plot: sufficient for inclusion in a classification revision
Overall Plot Vegetation Fields: 
Field Height ? 0.25 m
Tree Cover ? 0 %
Shrub Cover ? 0 %
Field Cover ? 23 %
Nonvascular Cover ? 0 %
Misc Fields: 
Observation Narrative ? original plot ID: rap2917rlv, 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 Bromus diandrus Bromus diandrus Roth Bromus diandrus Bromus diandrus **   BRDI3 Bromus diandrus Roth Bromus diandrus Bromus diandrus **   BRDI3 Medium
8 %
        -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
6 %
        -none-
3 Solanum douglasii Solanum douglasii Dunal Solanum douglasii Solanum douglasii **   SODO Solanum douglasii Dunal Solanum douglasii Solanum douglasii **   SODO Medium
0.2 %
        -none-
4 Avena fatua Avena fatua L. Avena fatua Avena fatua **   AVFA Avena fatua L. Avena fatua Avena fatua **   AVFA Medium
0.2 %
        -none-
5 Marrubium vulgare Marrubium vulgare L. Marrubium vulgare Marrubium vulgare **   MAVU Marrubium vulgare L. Marrubium vulgare Marrubium vulgare **   MAVU Medium
0.2 %
        -none-
6 Centaurea melitensis Centaurea melitensis L. Centaurea melitensis Centaurea melitensis **   CEME2 Centaurea melitensis L. Centaurea melitensis Centaurea melitensis **   CEME2 Low
4 %
        -none-
7 Anagallis arvensis Anagallis arvensis L. Anagallis arvensis Anagallis arvensis **   ANAR Anagallis arvensis L. Anagallis arvensis Anagallis arvensis **   ANAR Low
1 %
        -none-
8 Melilotus indicus Melilotus indicus (L.) All. Melilotus indicus Melilotus indicus **   MEIN2 Melilotus indicus (L.) All. Melilotus indicus Melilotus indicus **   MEIN2 Low
1 %
        -none-
9 Lupinus concinnus Lupinus concinnus J. Agardh Lupinus concinnus Lupinus concinnus **   LUCO Lupinus concinnus J. Agardh Lupinus concinnus Lupinus concinnus **   LUCO Low
0.2 %
        -none-
10 Vicia villosa Vicia villosa Roth Vicia villosa Vicia villosa **   VIVI Vicia villosa Roth Vicia villosa Vicia villosa **   VIVI Low
0.2 %
        -none-
11 Hirschfeldia incana Hirschfeldia incana (L.) Lagr.-Foss. Hirschfeldia incana Hirschfeldia incana **   HIIN3 Hirschfeldia incana (L.) Lagr.-Foss. Hirschfeldia incana Hirschfeldia incana **   HIIN3 Low
0.2 %
        -none-
12 Sonchus oleraceus Sonchus oleraceus L. Sonchus oleraceus Sonchus oleraceus **   SOOL Sonchus oleraceus L. Sonchus oleraceus Sonchus oleraceus **   SOOL Low
0.2 %
        -none-
13 Phacelia cicutaria Phacelia cicutaria Greene Phacelia cicutaria Phacelia cicutaria **   PHCI Phacelia cicutaria Greene Phacelia cicutaria Phacelia cicutaria **   PHCI Low
0.2 %
        -none-
14 Cirsium vulgare Cirsium vulgare (Savi) Ten. Cirsium vulgare Cirsium vulgare **   CIVU Cirsium vulgare (Savi) Ten. Cirsium vulgare Cirsium vulgare **   CIVU Low
0.2 %
        -none-
15 Erodium cicutarium Erodium cicutarium (L.) L'Hér. ex Aiton Erodium cicutarium Erodium cicutarium **   ERCI6 Erodium cicutarium (L.) L'Hér. ex Aiton Erodium cicutarium Erodium cicutarium **   ERCI6 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      
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 ?
Brassica nigra - Bromus diandrus Herbaceous Vegetation     Keeler-Wolf and Evens 2006 no
Keeler-Wolf, Todd
Evens, Julie


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


User Defined Values
No User Defined Data for this plot