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UNCOMMON
PLANTS
Adder's-tongue Fern   (Ophioglossum vulgatum var pycnostichum )
(Perennial)
 

Photo of a Adder's Tongue.
 


General Description:
Each plant, usually about 11-20 cm high, has one yellow-green, broadly tongue-shaped leaf, 5-8 cm by 3-5 cm.  Leaves have an unusual, net-like arrangement of veins which are not easily seen.  The spore-producing part appears as a linear projection from the base of the leaf and extends about the length of the leaf above the leaf itself.  Plants begin to appear in late March and die back by mid-June.  Not all leaves have the spore-producing segment and without it, they may somewhat resemble young green-brier leaves.

 

General Habitat:  Low-lying, but not wet hardwood areas with a semi-open canopy are the preferred habitat.  The populations at Russells Creek are in medium aged hardwoods on a gentle slope with areas that appear to hold water for a short time after a rain.

                                                                                                 Adder's-tongue Fern
 

 

 

 

Found in wet, open hardwood

areas near entrance gate at

Bussey Point, Lincoln Co.,

and in stream floodplains in

several McCormick Co. locations.
 
                                                              Flowering and fruiting chart



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