Eurasian milfoil and parrotfeather _class B designate_  Document
Sample Eurasian milfoil and parrotfeather _class B designate_
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Eurasian water milfoil and parrot feather (Class B designate):
By: Weed Board Staff             Almost all of the questions
that we get concerning aquatic weeds are about milfoil, of which
several species occur in San Juan County. While most local
milfoils are natives, two species, Eurasian milfoil
(Myriophyllum spicatum) and parrot feather (M. aquaticum) are
introduced invasives and listed as Class B designate weeds. The
submerged leaves of the native and Eurasian water milfoils are
in whorls of three to five and are finely dissected. The easiest
way to distinguish between the water milfoils is to note the
number of segments on each under water leaf: the Eurasian
species usually has 30 or more lobes while the native species
have less than 26, although there are instances of overlap in
this characteristic. In this case, it may take DNA analysis to
distinguish t