Pteridium aquilinum var. caudatum

(Linnaeus) Sadebeck

Jahrb. Hamburg. Wiss. Anst. Beih. 3: 5. 1897.

Common names: Lacy bracken
Illustrated
Basionym: Pteris caudata (Linnaeus) Maxon Sp. Pl. 2: 1075. 1753
Synonyms: Pteridium caudatum
Treatment appears in FNA Volume 2.

Petiole 20–75 cm. Blade broadly ovate to deltate, 2–3-pinnate-pinnatifid, 30–100 × 20–80 cm; blades, rachises, and costae usually densely covered abaxially with abundant, straight, stiff, subappressed to spreading hairs. Pinnae all narrowly to broadly triangular; terminal segment of each pinna ca. 10 times longer than wide, longer ultimate segments several times their width apart, ca. 1–2.5 mm wide. Pinnules at nearly 90° angle to costa; fertile ultimate segments only decurrent, or more decurrent than surcurrent. Outer indusia entire, glabrous.


Habitat: In barrens, pine woodlands, and edges of deciduous woods in strongly acid to circumneutral soil, forming large colonies in exposed sites
Elevation: 0 m

Distribution

V2 511-distribution-map.gif

Fla., Mexico, West Indies, Bermuda, Central America, South America from Colombia to Peru

Discussion

In Florida and West Indies material, the abaxial surfaces are quite hairy; in Central American material they are often much less hairy.

Selected References

None.

Lower Taxa

None.
Carol A. Jacobs +  and James H. Peck +
(Linnaeus) Sadebeck +
distinct +
Pteris caudata +
1-pinnate;decompound +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
glabrous +  and hairy +
2-3-pinnate-pinnatifid;broadly ovate;deltate +
papery;leathery +
20 cm200 mm <br />0.2 m <br /> (80 cm800 mm <br />0.8 m <br />) +
Lacy bracken +
Fla. +, Mexico +, West Indies +, Bermuda +, Central America +  and South America from Colombia to Peru +
In barrens, pine woodlands, and edges of deciduous woods in strongly acid to circumneutral soil, forming large colonies in exposed sites +
pale +  and dark +
straight +
subappressed +  and spreading +
fused +  and free +
monomorphic +
deltate +
50 cm500 mm <br />0.5 m <br /> (450 cm4,500 mm <br />4.5 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
glabrous +  and short-hairy +
20 cm200 mm <br />0.2 m <br /> (75 cm750 mm <br />0.75 m <br />) +
Jahrb. Hamburg. Wiss. Anst. Beih. +
Illustrated +
tetrahedral-globose +
granulate +
branching +  and solenostelic +
subterranean +
slender +
Pteridium caudatum +
Pteridium aquilinum var. caudatum +
Pteridium aquilinum +
variety +
o--shaped +  and u +
forking +  and pinnate +
joined +  and free +
2-3-forked +