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Ophioglossum engelmannii Prantl
LIMESTONE ADDERS TONGUE FERN
Limestone adderstongue

Life   Plantae   Pteridophyta   Ophioglossaceae   Ophioglossum

Ophioglossum engelmannii
© Copyright Steve Baskauf, 2002-2011 · 4
Ophioglossum engelmannii

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Ophioglossum engelmannii
© Copyright Steve Baskauf, 2002-2011 · 4
Ophioglossum engelmannii
Ophioglossum engelmannii, whole plant - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Ophioglossum engelmannii, whole plant - unspecified

Ophioglossum engelmannii
© Copyright Steve Baskauf, 2002-2011 · 4
Ophioglossum engelmannii
Ophioglossum engelmannii
© Copyright Steve Baskauf, 2002-2011 · 4
Ophioglossum engelmannii

Ophioglossum engelmannii
© Copyright Steve Baskauf, 2002-2011 · 4
Ophioglossum engelmannii
Ophioglossum engelmannii
© Copyright Steve Baskauf, 2002-2011 · 4
Ophioglossum engelmannii

Ophioglossum engelmannii
© Copyright Michael Strickland, 2008 · 1
Ophioglossum engelmannii
Ophioglossum engelmannii
© George Yatskievych, 2003 · 1
Ophioglossum engelmannii

Ophioglossum engelmannii, entire
© George Yatskievych, 2006-2011 · 1
Ophioglossum engelmannii, entire
Ophioglossum engelmannii, sporangia
© George Yatskievych, 2006-2011 · 1
Ophioglossum engelmannii, sporangia

Ophioglossum engelmannii, sporophyll
© George Yatskievych, 2006-2011 · 1
Ophioglossum engelmannii, sporophyll
Ophioglossum engelmannii, entire1
© George Yatskievych, 2006-2011 · 1
Ophioglossum engelmannii, entire1
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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=OPEN ---> https://plants.usda.gov/java/profile?symbol=OPEN
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Following modified from Flora of North America
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FNA | Family List | FNA Vol. 2 | Ophioglossaceae | Ophioglossum

3. Ophioglossum engelmannii Prantl, Ber. Deutsch. Bot. Ges. 1: 351. 1883.

Limestone adder's-tongue

Roots to 25 per plant, tan to brown, 0.5-1.5mm diam., straight, producing proliferations. Stem upright, to 1.5 cm, 4 mm diam., leaves 1-2 per stem. Trophophore stalk to 0.1 cm, 0.01 times length of blade. Trophophore blade erect to spreading, commonly ± folded when alive, uniformly pale green throughout when dried, dull, ovate to ovate-lanceolate, 10 × 4.5 cm, firm, herbaceous, base narrowed abruptly, apex with apiculum to 0.8 mm; venation complex-reticulate, veinlets forming numerous, very tiny, secondary areoles within the major areoles. Sporophores arising at ground level, 1.3-2.5 times as long as trophophore; sporangial clusters 2-4 × 0.13-0.31 cm, pairs of sporangia 20-40, apiculum 0-1.3 mm.

Leaves appearing early-late spring, often with second flush later in season following summer rains. Mostly in soil over limestone in open fields, pastures, and cedar glades; 50-1000 m; Ala., Ariz., Ark., Fla., Ga., Ill., Ind., Kans., Ky., La., Miss., Mo., Ohio, Okla., N.Mex., N.C., Tenn., Tex., Va., W.Va.; Mexico; Central America.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ophioglossum+engelmannii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ophioglossum+engelmannii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ophioglossum+engelmannii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Updated: 2017-11-22 19:10:52 gmt
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