Aquatic Plant Inventory for Upper St. Croix - Eau Claire Rivers Watershed

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#	Genus	Species	C Value*	Common Name
1	Spirogyra	"filamentous"		Algae
2	Sagittaria	latifolia	3	Arrowhead, common
3	Utricularia	vulgaris	7	Bladderwort, common
4	Schoenoplectus	acutus	6	Bulrush, hardstem
5	Schoenoplectus	validus	4	Bulrush, softstem
6	Schoenoplectus	subterminalis	9	Bulrush, water
7	Sparganium	eurycarpum	5	Bur-reed, common
8	Typha	sp.		Cattail
9	Ceratophyllum	demersum	3	Coontail
10	Lemna	sp.		Duckweed
11	Elodea	canadensis	3	Common waterweed
12	Equisetum	arvense	1	Horsetail rush
13	Iris	versicolor	5	Iris, northern blue flag
14	Lobelia	dortmanna	10	Lobelia, water
15	Myriophyllum	demersum		Milfoil, northern
16	Myriophyllum	spicatum	0	Milfoil, eurasian
17	Chara	spp	7	Muskgrass
18	Najas	flexilis	6	Naiad, slender
19	Pontaderia	cordata	8	Pickerel weed
20	Alisma	triviale	4	Plantain, water
21	Potamogeton	richardsonii	5	Pondweed, clasping-leaf
22	Potamogeton	robbinsii	8	Pondweed, fern
23	Potamogeton	zosteriformis	6	Pondweed, flatstem
24	Potamogeton	natans	5	Pondweed, floating-leaf
25	Potamogeton	illinoensis	6	Pondweed, Illinois
26	Potamogeton	amplifolius	7	Pondweed, large-leaf
27	Potamogeton	potamos		Pondweed, leafy
28	Potamogeton	epihydrus	8	Pondweed, ribbon-leaf
29	Potamogeton	pectinatus	3	Pondweed, sago
30	Potamogeton	pusillus		Pondweed, small-leaf
31	Potamogeton	spirillus	7	Pondweed, spiral-fruited
32	Potamogeton	praelongus	8	Pondweed, white-stem
33	Carex	lacustris	6	Sedge, lake
34	Dulichium	arundinaceum	9	Sedge, three-way
35	Littorella	uniflora	10	Shoreweed, American
36	Polygonum	amphibium	5	Smartweed
37	Nuphar	variegata	6	Spadderdock (UWSP - Spatterdock)
38	Eleocharis	sp.		Spikerush
39	Ranunculus	flabellaris	8	Water Crowfoot yellow
40	Nymphea	odorata	6	Water-lily, white
41	Brasenia	schreberi	7	Watershield
42	Vallisneria	americana	6	Wild celery
43	Zizania	palustris	8	Wild rice
44	Ceratophyllum	echinatum	10	Spiny hornwort
45	Sparganium	fluctuans	10	Bur-reed, floating leaved
46	Utricularia	minor	10	Bladderwort, small
47	Calla	palustris	9	Wild calla, water arum
48	Sagittaria	graminea	9	Arrowhead, grass-leaved
49	Sparganium	emersum	9	Bur-reed, softstem
50	Bidens	beckii	8	Water marigold
51	Potentilla	palustris	8	Marsh cinquefoil
52	Sagittaria	cristata	8	Arrowhead, crested
53	Sagittaria	rigida	8	Arrowhead, stiff
54	Sagittaria	spp.	8	Arrowhead
55	Cicuta	bulbifera	7	Bulbearing water hemlock
56	Elodea	nuttallii	7	Slender waterweed
57	Equisetum	fluviatile	7	Horsetail, water
58	Myriophyllum	sibiricum	6	Milfoil, northern water
59	Najas	gracillima	7	Naiad, northern
60	Potamogeton	gramineus	7	Pondweed, variable
61	Eleocharis	palustris	6	Spikerush, common
62	Lemna	trisulca	6	Duckweed, forked
63	Ranunculus	longirostris	6	Water Crowfoot, stiff
64	Zosterella	dubia	6	Water star grass
65	Asclepias	incarnata	5	Milkweed, swamp
66	Lemna	turionifera	5	Duckweed, turion
67	Spirodela	polyrhiza	5	Duckweed, great
68	Eleocharis	acicularis	3	Spikerush, needle
69	Typha	latifolia	1	Cattail, broad-leaved
70	Myosotis	scorpioides	0	Forget-me-not, common
71	Potamogeton	crispus	0	Pondweed, curly-leaf
72	Rorippa	nasturtium-aquaticum	0	Water cress
73	Utricularia	intermedia	9	Bladderwort, flat-leaf

* Each plant is assigned a coefficient of conservatism (C value) that reflects its sensitivity to disturbance. C values range from 0 to 10, the higher the number, the more intolerant of disturbance. Invasive species have a C value of 0.

Thanks to the following for providing data:

• The Barnes EWM Team.
• The Robert W. Freckmann Herbarium at the University of Wisconsin - Stevens Point.
• The St. Croix/Gordon Flowage Aquatic Macrophyte study and report from a cooperative project between the Gordon/St. Croix Flowage Association and the University of Wisconsin - Stevens Point.
• The Wisconsin Department of Natural Resources.