Riparian Coverage at Middle Waterway (Simpson/Trustees) - Percent Cover - Year 1 (2002)
Common Name	Scientific Name	No. of Quadrats Found	Percent Cover (range)	Percent Cover (mean)
Herbs, Forbes and Grasses
brome	Bromus sp.	11	15 to 45%	28.6
colonial bentgrass	Agrostis tenuis	7	1 to 75%	30.0
common St. John's-wort	Hypericum perforatum	7	1 to 30%	8.9
common velvet-grass	Holcus lanatus	3	Trace to 3%	1.7
hairy catsear	Hypochaeris radicata	6	Trace to 3%	1.5
lupine	Lupinus sp.	5	Trace to 15%	4.2
orchard grass	Dactylis glomerata	2	1 to 5%	3.0
pea	Lathyrus sp.	3	Trace to 10%	3.4
red clover	Trifolium pratense	1	3%	3.0
English plantain	Plantago lanceolata	4	2 to 10%	4.3
sheep sorrel	Rumex acetosella	2	Trace to 7%	3.5
silver hairgrass	Aira caryophyllea	3	5 to 15%	8.3
strawberry	Fragaria chiloensis	11	2 to 35%	15.5
unclassified-herb	unclassified-herb	3	Trace to 1%	0.4
Shrubs
common snowberry	Symphoricarpos albus	3	5 to 30%	14.0
Himalayan blackberry	Rubus discolor	4	3 to 45%	18.3
kinnikinnick	Arctostaphylos uva-ursi	4	20 to 70%	51.3
nootka rose	Rosa nutkana	1	20%	20.0
oceanspray	Holodiscus discolor	1	10%	10.0
butterfly bush	Buddleja davidii	1	5 to 5%	5.0
rose	Rosa sp.	6	2 to 65%	23.5
trailing blackberry	Rubus ursinus	1	3%	3.0
vine maple	Acer circinatum	1	5%	5.0
Trees
bigleaf maple	Acer macrophyllum	1	5%	5.0
black cottonwood	Populus balsamifera	6	5 to 45%	25.0
Douglas-fir	Pseudotsuga menziesii	1	15%	15.0
madrone	Arbutus menziesii	3	1 to 5%	2.3
Scouler's willow	Salix scouleriana	1	75%	75.0
Shore pine	Pinus contorta	1	5%	5.0
western redcedar	Thuja plicata(1)	3	5 to 35%	18.3
Unknown
unknown	unknown	2	2 to 3%	2.5
Notes: There were a total of 23 quadrats
Bold are planted native species, underline indicates volunteer native species.  (All
other entries are non-native or invasive.)
Mean percent cover is calculated for the number of quadrats where the plant was observed.
(1) Thuja plicata was planted and there are volunteers.