1. OPHIOGLOSSUII Trag. 155]. 
Lingua serpentina Latinis, Graects opioyhaccov & 
Germants Naterzuenglin, a formasua. . . Tragus, 
Pist= 3230000. 
Rootstocks erect with numerous fleshy roots. Sterile 
leaf-segments entire, lanceolate, ovate or rctund. Spore- 
cases connate, forming a two-ranked spike. 
1 Sterzle segment obtuse. 
1. O. vulgatum L. Phe 
Ophioglossum radice repente. Gron. 1743. Fl. 
WAte LOO. 
Ophioglossum vulgatum L. 1753.Sp. Pl. 1062. 
Flatow, T3880; Perns Ne Aut.62 26 nett. 6 fein 
1-4; 1889. in Gray Man. 695. Underw.in Ul. 
PIZ1 231900. Nate nh ems €d. (6. 667 190m. at 
Britt. Man. 2, Clute, 1901. Ferns 45. t. 1. 
Waters, 1903. Ferns 25. 341. 
ADDER’S TONGUE. 
Plants 1--3 dm. high; sterile leaf-segment ovate-ellip- 
tic, 3--1o cm. long, inserted below the middle of the 
petiole; spike 2--4 cm. long. 
In meadows and woods, rare. 
This plant was used by the ancients in the healing of 
wounds ; hence the Swedish word Leketunga ‘‘healing- 
tongue.” 
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