Riparian Coverage at Squally Beach - Percent Cover - Year 1 (2002)
Common Name Scientific Name No. of Quadrats Found 1 Percent Cover (range) Percent Cover (mean)
Herbs, Forbes and Grasses
birds-foot trefoil Lotus corniculatus 20 2 to 35% 12.9
black medick Medicago lupulina 12 Trace to 5% 3.3
bluegrass Poa sp. 3 5 to 10% 8.3
brome Bromus sp. 2 2 to 3% 2.5
bull thistle Cirsium vulgare 2 3 to 20% 11.5
Canada thistle Cirsium arvense 3 5 to 15% 11.7
cheatgrass Bromus tectorum 5 1 to 5% 3.6
colonial bentgrass Agrostis tenuis 14 Trace to 10% 3.4
common dandelion Taraxacum officinale 1 3% 3.0
common horsetail Equisetum arvense 11 2 to 50% 20.6
common rush Juncus effusus 2 Trace to 3% 1.5
common St. John's-wort Hypericum perforatum 1 3% 3.0
common stork's-bill Erodium cicutarium 2 Trace 0.1
common velvet-grass Holcus lanatus 15 Trace to 10% 3.5
creeping buttercup Ranunculus repens 2 1% 1.0
hairy catsear Hypochaeris radicata 1 Trace 0.1
hedge mustard Sisymbrium officinale 3 5 to 50% 21.7
Japanese knotweed Polygonum cuspidatum 2 Trace 0.1
lettuce Lactuca sp. 1 2% 2.0
lupine Lupinus sp. 14 Trace to 55% 11.2
oxeye daisy Chrysanthemum leucanthemum 2 2 to 5% 3.5
pea Lathyrus sp. 1 Trace 0.1
perennial ryegrass Lolium perenne 24 3 to 45% 20.2
purple-leaved willowherb Epilobium ciliatum 2 Trace to 3% 1.5
quackgrass Agropyron repens 1 5% 5.0
rabbitfoot clover Trifolium arvense 3 2 to 5% 3.0
red clover Trifolium pratense 11 1 to 10% 3.9
red fescue Festuca rubra 8 3 to 15% 5.8
English plantain Plantago lanceolata 7 Trace to 3% 1.9
toad rush Juncus bufonius 1 Trace 0.1
white clover Trifolium repens 7 Trace to 5% 2.6
white sweet-clover Melilotus alba 23 2 to 70% 28.6
willowherb Epilobium sp. 13 Trace to 15% 3.1
yarrow Achillea millefolium 3 Trace to 2% 0.7
yellow salsify Tragopogon dubius 1 3% 3.0
unclassified-composite unclassified-composite 6 Trace to 3% 1.8
unclassified-grass unclassified-grass 10 1 to 15% 4.8
unclassified-herb unclassified-herb 3 Trace 0.1
unclassified-wheat unclassified-wheat 2 Trace 0.1
Shrubs
beaked hazelnut Corylus cornuta 1 3% 3.0
common snowberry Symphoricarpos albus 2 5% 5.0
dull Oregon-grape Mahonia nervosa 3 1 to 5% 3.0
Himalayan blackberry Rubus discolor 11 Trace to 25% 3.7
nootka rose Rosa nutkana 1 15% 15.0
oceanspray Holodiscus discolor 4 3 to 10% 5.8
red-flowering current Ribes sanguineum 1 3% 3.0
red-osier dogwood Cornus stolonifera 3 5 to 15% 11.7
rose Rosa sp. 10 1 to 10% 6.3
Scot's broom Cytisus scoparius 4 2% 2.0
trailing blackberry Rubus ursinus 1 Trace 0.1
Trees
Douglas-fir Pseudotsuga menziesii 5 2 to 15% 8.4
red alder Alnus rubra 15 1 to 15% 6.5
Scouler's willow Salix scouleriana 11 10 to 50% 22.3
Notes: There were a total of 26 quadrats
           1:  No. of  Quadrats Found = Number of quadrats in which the species was observed
           Bold are planted native species, underline indicates volunteer native species.  (All
           other entries are non-native or invasive.)  Unknown species are assumed to be weeds or invasives.
           Mean percent cover is calculated for the number of quadrats where the plant was observed.