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Potamogeton foliosus Raf.<br />
? Leafy pondweed S5 CP<br />
[The identity <strong>of</strong> specimens <strong>of</strong> P. foliosus and P. pusillus L. from<br />
Cootes Paradise need verification.]<br />
Potamogeton friesii Rupr.<br />
H Fries’ pondweed S4 CP<br />
[A single specimen from 1949, possibly a hybrid with P. zosteriformis]<br />
Potamogeton natans L.<br />
Common floating pondweed S5 CP<br />
A single specimen. Seen but not collected in 1998.<br />
Potamogeton nodosus Poir.<br />
Knotty pondweed S5 CP HV<br />
Potamogeton pectinatus L.<br />
Sago pondweed S5 CP HV<br />
Potamogeton perfoliatus L.<br />
Clasping-leaved pondweed S4 CP<br />
Potamogeton pusillus L.<br />
? Small pondweed S4S5 CP<br />
[The identity <strong>of</strong> specimens <strong>of</strong> P. foliosus and P. pusillus L. from<br />
Cootes Paradise need verification.]<br />
Potamogeton zosteriformis Fern.<br />
Flat-stemmed pondweed S5 CP HV<br />
Water-nymph or naiad family<br />
Najas flexilis (Willd.) Rost. & W. Schmidt<br />
Najadaceae<br />
X Slender najas S5 CP<br />
Najas minor All.<br />
+N Smaller najas SE2 CP<br />
First discovered in 1999.<br />
74<br />
Horned Pondweed family<br />
Zannichellia palustris L.<br />
Zannichelliaceae<br />
Horned pondweed S4 CP HV<br />
Flowering rush family<br />
Butomus umbellatus L.<br />
Butomaceae<br />
+N Flowering-rush SE5 CP HV<br />
Plantings in Cootes Paradise in <strong>the</strong> 1950s did not establish.<br />
Collected in Carroll’s Bay in 2000. See also Gaiser, 1949.<br />
Arum family<br />
Acorus americanus (Raf.) Raf.<br />
Araceae<br />
Sweetflag S4 CP HV<br />
[A. calamus L. Plants in RBG sanctuary produce viable seed, and on<br />
this basis are distinguished from true A. calamus, a sterile triploid]<br />
Arisaema triphyllum (L.) Schott ssp. triphyllum<br />
Jack-in-<strong>the</strong>-pulpit S5 CP HV RC BT<br />
Calla palustris L.<br />
Wild calla S5 CP HV<br />
Peltandra virginica (L.) Schott & Endl. ssp. virginica<br />
? Tuckahoe S5 CP<br />
A single plant growing beside a boardwalk on <strong>the</strong> north shore <strong>of</strong><br />
Cootes Paradise. It may persist from Lamoureaux’s (1963) plantings.<br />
Symplocarpus foetidus (L.) Salisb. ex Nutt.<br />
Skunk-cabbage S5 CP HV<br />
Duckweed family<br />
Lemna minor L.<br />
Lemnaceae<br />
Lesser duckweed S5 CP HV<br />
Lemna trisulca L.<br />
Star duckweed S5 CP HV<br />
Spirodela polyrhiza (L.) Schleid.<br />
Greater duckweed S5 CP HV<br />
75
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