Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
3. Ophioglossaceae, the Adder's-tongue Family
1. Ophioglossum L. -- Adder's tongue
1. Ophioglossum vulgatum L.
Small, erect, herbaceous perennial, (0.5)1-3 dm tall, from slender rhizomes.
Leaves mostly solitary or paired, simple, entire, each blade borne on
a stipe 3-15 cm long, the blades erect to ascending, elliptic
to ovate, rounded to acute at the tip, 2.5-10 cm long, 1-4 cm wide, conspicuously
net-veined. Sporangia homosporous, continuous in 2 rows in a terminal,
unbranched spike, the spike 1-4 cm long, subtended by the leaf blade
and borne above it on a stalk 3-15 cm long; spores single, with triradiate
markings. Gametophyte small, subterranean, mycorhizal. Jun--Aug. Sandy wet meadows;
rare; se ND, nc NE; (Circumboreal in temperate zones, in N.Amer. from N.S. to
WA and irregularly scattered s to FL and Mex.).
Our plants belong to the northern var. pseudopodum (Blake) Farw.
Barker, W. T. and J. Hanson. 1976. A record of Ophioglossum vulgatum L.
for North Dakota. Amer. Fern J. 66:137.
Return to Family -- Ophioglossaceae - The Adder's-tongue