West Highland Flora

Alternate Water-milfoil


Myriophyllum alterniflorum

 

Myriophyllum alterniflorum

Photo Carl Farmer
2 Jul 2003 River Snizort, Skye

Common in lochs, burns and rivers.

Leaves c 1-2.5 cm

ID: Leaves usually 4 in a whorl, each pinnate with linear segments giving feathery effect.  That much in common with Spiked Water-Milfoil.  But flower-spike different, upper (male) flowers in ones or twos, not whorls of 4.

Other features: Lowest flowers are female in whorls of 2-4, above these are hemaphrodite flowers, and at the top male flowers in ones or twos.  Petals yellow streaked with red.  Flower-spike has drooping tip in bud, unlike with Spiked Water-Milfoil

 

Myriophyllum alterniflorum

Photo Carl Farmer
2 Jul 2003 River Snizort, Skye
 

Leaves, underwater

 

Myriophyllum alterniflorum

Photo Carl Farmer
2 Jul 2003 River Snizort, Skye
 

Flowering stem-tip


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