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broad halberd fern

least halberd fern

Stems

erect, compact.

horizontal, short-creeping.

Petiole

straw-colored or rarely brown, 1–2 times length of blade, glabrous on both surfaces, base scaly;

scales linear to lanceolate, 3–10 × 0.5–2 mm.

straw-colored, 1–3 times length of blade, hairs absent abaxially, pubescent adaxially, base scaly;

scales lanceolate to linear, 1–3 × 0.3–0.5 mm.

Blade

ovate to pentagonal, 1-pinnate or (in small plants) ternately lobed, (12–)20–40(–50) × 14–40(–45) cm.

deltate to pentagonal, 1-pinnate or ternately lobed, 5–10 × 3–7 cm.

Pinnae

1–2(–3) pairs, 12–22 cm, base cordate, margins shallowly lobed, with pair of basal lobes and without proliferous buds in axils.

absent or 1(–2) pair, or blade shallowly pinnatifid, 4–7 cm, base rounded, without proliferous buds in axils.

Indusia

peltate.

peltate.

Rachis

and costae glabrous abaxially.

and costae pubescent abaxially.

Areoles

with included veinlets.

rarely with included veinlets.

2n

= 160.

= 80.

Tectaria heracleifolia

Tectaria fimbriata

Habitat Rocky hammocks, limestone outcrops in shade, cave entrances Sinkholes, on shaded ledges or occasionally in sun
Elevation 0–100 m (0–300 ft) 0 m (0 ft)
Distribution
from FNA
FL; TX; Mexico; Central America; West Indies in Antilles; South America to Peru
[WildflowerSearch map]
[BONAP county map]
from FNA
FL; Mexico in Yucatán; West Indies in Bahamas; Greater Antilles
[BONAP county map]
Discussion

The hybrid between Tectaria fimbriata and T. coriandrifolia is T. × amesiana A. A. Eaton. Although intermediate between the two parents, the hybrid will lead to T. fimbriata in the key. The hybrid may be distinguished from T. fimbriata by scattered hairs on abaxial surface of petioles and misshapen spores.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 2. FNA vol. 2.
Parent taxa Dryopteridaceae > Tectaria Dryopteridaceae > Tectaria
Sibling taxa
T. coriandrifolia, T. fimbriata, T. incisa
T. coriandrifolia, T. heracleifolia, T. incisa
Synonyms Aspidium heracleifolium Aspidium fimbriatum, Aspidium minimum, Aspidium trifoliatum var. minimum, Sagenia lobata, T. lobata, T. minima
Name authority (Willdenow) L. Underwood: Bull. Torrey Bot. Club 33: 200. (1906) (Willdenow) Proctor & Lourteig: Bradea 5: 386. (1990)
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