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Published In: Berichte der Deutschen Botanischen Gesellschaft 1: 351. 1883. (Ber. Deutsch. Bot. Ges.) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native


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2. Ophioglossum engelmannii Prantl (Engelmann's adder's tongue) Pl. 10b,c; Map 48

Stems short-cylindrical, sometimes slightly thickened. Leaves 1–2 per stem, 8–35 cm long. vegetative portion often somewhat folded lengthwise, sessile, oblong to elliptic, the tip obtuse to acute, usually sharply pointed. Principal veins forming areoles that enclose thinner, anastomosing veins. Fertile portion 1–2.5 times as long as the sterile portion. March–October.

Throughout the Ozark, Ozark Border, and Osage Plains Divisions, locally north to Monroe and Ray Counties (southern U.S. north to Kansas and West Virginia, south to Central America). Limestone and dolomite glades, bluffs, and outcrops, sometimes also in rocky openings of upland forests on dolomite.

This is the commonest species of Ophioglossum in the state and is a characteristic plant of carbonate glades. Populations frequently produce only vegetative foliage and sometimes produce new leaves with the onset of fall rains after dying back during the dry summer.



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