Ophioglossum vulgatum L.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Ophioglossaceae
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Scientific Name
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Description
Species Description - Plants 7–35 cm; stipe (1.5–)6–13(–19) cm; lvs mostly solitary; blade flat, elliptic-oblong to ovate, rounded to obtuse or subacute, but not apiculate, mostly 4–8 × (1–)2–4 cm, sessile or short-stalked; venation regularly areolate, the areoles all small with mostly free included veinlets, not enclosing secondary areoles; sporophore 1–5 cm × 2.5–4 mm on a stalk mostly 7–14 cm; sporangia 0.6–1.2 mm thick; 2n=960–1320. Circumboreal, in Amer. from N.S. to Wash., s. to Fla. and Tex. Two vars. with us.