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Farwell's Water-milfoil Myriophyllum farwellii Morong |
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Family: Water-Milfoil Family (Haloragaceae)
State Protection: Threatened 
listed species are those with: 1) 6 to fewer than 20 extant sites, or 2) 1,000 to fewer than 3,000 individuals, or 3) restricted to not less than 4 or more than 7 U.S.G.S. 7 ? minute topographical maps, or 4) listed as threatened by U.S. Department of the Interior. Federal Protection: Not Listed State Rarity Rank: S2
A State Rarity Rank of S2 means: This plant is threatened/imperiled in New York because of rarity (typically 6-20 populations or few remaining individuals) or is vulnerable to extirpation from New York due to biological factors. Global Rarity Rank: G5
A Global Rarity Rank of G5 means: This species is demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery. Did you know? The genus name Myriophyllum comes from the Greek, murios (myrios), "countless, infinite", and fullon (phyllon), "leaf; foliage"; hence "many leaved". The specific name farwellii, honors the American botanist Oliver Atkins Farwell (1867-1944). Small fish and aquatic invertebrates use this plant for shelter. Most populations in New York are large and contain thousands of plants. |
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| State Ranking Justification | [-] |
There are seven known populations and at least six historical populations. There are numerous Adirondack lakes that should be surveyed. The current threats are minimal and the presumed long/short-term trends are stable.
| Short-term Trends | [-] |
Few of New York's populations have been surveyed more than once so trends are difficult to assess. Our best guess though is these populations are relatively stable.
| Long-term Trends | [-] |
This plant has always been rare in New York and many historical localities have not been checked. The number of plants has probably not changed appreciably in the last 100 years. With the continued acidification of lakes, there is a chance that this plant will become more common within the state.
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Home | Advanced Search | About Us Animal Guides | Plant Guides | Community Guides © 2004-2012 New York Natural Heritage Program, a partnership between the New York State Department of Environmental Conservation and the State University of New York College of Environmental Science and Forestry Please cite this page as:
New York Natural Heritage Program. 2013. Online Conservation Guide for Myriophyllum farwellii. Available from: http://acris.nynhp.org/guide.php?id=9105. Accessed May 25th, 2013. 
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