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Published In: Tekhno-Botanicheskīĭ Slovar': na latinskom i rossīĭskom iazykakh. Sanktpeterburgie 438. 1820. (27 Mar 1820) (Tekhno-Bot. Slovar.) Name publication detail

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 8/5/2009)


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OPHIOGLOSSACEAE (Adder's Tongue Family)

(Clausen, 1938)

Plants perennial, homosporous, with fleshy roots and short, erect stems, these sometimes cormlike. Leaves divided along the petioles into fertile and vegetative portions. Petioles with scalelike, sheathing, stipular flanges of tissue. Vegetative leaf blades entire or variously compound. Fertile portions of leaves branched or unbranched. Sporangia splitting open horizontally, lacking an annulus. Spores trilete, 25–55 mm in diameter, light yellow to yellow, up to 15,000 per sporangium. Gametophytes subterranean, mycorrhizal, lacking chlorophyll, cylindrical to nearly spherical. Three to 5 genera, 70–80 species, nearly worldwide.


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1 Vegetative portion of the leaf pinnately compound; veins not anastomosing; sporangia sessile to short-stalked 1 Botrychium
+ Vegetative portion of the leaf simple; veins anastomosing; sporangia sunken into the axis of the fertile portion 2 Ophioglossum
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