Ophioglossum engelmannii

Prantl

Ber. Deutsch. Bot. Ges. 1: 351. 1883.

Common names: Limestone adder's-tongue
Illustrated
Treatment appears in FNA Volume 2.

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 ovatelanceolate, 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.


Phenology: Leaves appearing early–late spring, often with second flush later in season following summer rains.
Habitat: Mostly in soil over limestone in open fields, pastures, and cedar glades
Elevation: 50-1000 m

Distribution

V2 178-distribution-map.gif

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

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Ophioglossum engelmannii"
Apiculate (?) +, Acute (?) +  and Rounded (?) +
0 cm0 mm <br />0 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
Warren H. Wagner Jr. +  and Florence S. Wagner +
Prantl +
narrowed +
simple +, stalked +  and sessile +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (10 cm100 mm <br />0.1 m <br />) +
lanceolate +  and cordate +
0.3mm;45mm +
Limestone adder's-tongue +
Ala. +, Ariz. +, Ark. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Miss. +, Mo. +, Ohio +, Okla. +, N.Mex. +, N.C. +, Tenn. +, Tex. +, Va. +, W.Va. +, Mexico +  and Central America +
50-1000 m +
brown +  and white +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
linear +  and round +
Mostly in soil over limestone in open fields, pastures, and cedar glades +
of widely scattered , long , uniseriate hairs +
1 (?) +  and 2 (?) +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
3 cm30 mm <br />0.03 m <br /> (0 cm0 mm <br />0 m <br />) +
Leaves appearing early–late spring, often with second flush later in season following summer rains. +
epiphytic +  and terrestrial +
spore-bearing +  and laminate +
photosynthetic +
with long , uniseriate hairs +  and glabrous +
Ber. Deutsch. Bot. Ges. +
tan +  and brown +
straight +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
proliferous +
Illustrated +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
thick-walled +  and trilete +
stalked +  and simple +
1.3-2.5 times as long as trophophore +
divided +
unbranched +  and simple +
4 cm40 mm <br />0.04 m <br /> (?) +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0 cm0 mm <br />0 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
tuberculate +  and rugate +
Ophioglossum engelmannii +
Ophioglossum +
species +
10 cm100 mm <br />0.1 m <br /> (?) +
ovate +  and ovatelanceolate +
erect +  and prostrate +
0.01 times length of blade +
anastomosing +
Like (?) +, Arranged (?) +  and Pinnate (?) +