Ophioglossum petiolatum

Hooker

Exot. Fl. 1: 56. 1823.

Common names: Stalked adder's-tongue
Introduced
Treatment appears in FNA Volume 2.

Roots dark-brown, to 8 per plant, 0.8-1.3 mm diam., producing proliferations. Stem upright, 0.3-1 cm, 1.5-2.5mm diam., 2-3 leaves per stem. Trophophore stalk 0-3mm, 0-0.1 times length of blade. Trophophore blade erect to spreading, usually plane or nearly so when alive, gray-green, dull, ovate to trowel-shaped, to 6 × 3cm, fleshy, cuneate to truncate to nearly cordate at base, contracted gradually to acute apex, apiculum mostly absent; venation coarse, reticulate, areoles large with few free or anastomosing included veinlets. Sporophores arising at ground level, 0.8-7 times length of trophophore; sporangial clusters to 4 × 0.35 cm, with up to 30 pairs of sporangia, apiculum 0.3-1.2 mm.


Phenology: Leaves appearing during wet periods.
Habitat: Plants sometimes weedy in lawns, ditches, and around buildings
Elevation: 0-90m

Distribution

V2 324-distribution-map.gif

Introduced; Ala., Ark., Fla., Ga., La., Miss., Mo., N.C., Okla., S.C., Tex., Va., West Indies, Mexico, n South America, Asia, Pacific Islands

Discussion

Ophioglossum petiolatum grows readily in pots, making it suitable for botany instruction. Earliest records in North America date from 1900 to 1930, suggesting that it is probably introduced.

Selected References

None.

Lower Taxa

None.
... more about "Ophioglossum petiolatum"
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Warren H. Wagner Jr. +  and Florence S. Wagner +
Hooker +
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 +
Stalked adder's-tongue +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, S.C. +, Tex. +, Va. +, West Indies +, Mexico +, n South America +, Asia +  and Pacific Islands +
brown +  and white +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
linear +  and round +
Plants sometimes weedy in lawns, ditches, and around buildings +
of widely scattered , long , uniseriate hairs +
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 during wet periods. +
epiphytic +  and terrestrial +
spore-bearing +  and laminate +
photosynthetic +
with long , uniseriate hairs +  and glabrous +
dark-brown +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
proliferous +
Introduced +
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 +
0.8-7 times length of trophophore +
divided +
unbranched +  and simple +
0.15 cm1.5 mm <br />0.0015 m <br /> (?) +  and 0.25 cm2.5 mm <br />0.0025 m <br /> (?) +
2 +  and 3 +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0 cm0 mm <br />0 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
tuberculate +  and rugate +
Ophioglossum petiolatum +
Ophioglossum +
species +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
cuneate +  and truncate +
erect +  and prostrate +
0-0.1 times length of blade +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
anastomosing +
Like (?) +, Arranged (?) +  and Pinnate (?) +