Flora of North America species comparison

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Tectaria fimbriata

least halberd fern
Stems

horizontal, short-creeping.
Petiole

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

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

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

peltate.
Rachis

and costae pubescent abaxially.
Areoles

rarely with included veinlets.
2n

= 80.

Tectaria fimbriata
Habitat Sinkholes, on shaded ledges or occasionally in sun
Elevation 0 m (0 ft)
Distribution
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.
Parent taxa Dryopteridaceae > Tectaria
Sibling taxa
T. coriandrifolia, T. heracleifolia, T. incisa
Synonyms Aspidium fimbriatum, Aspidium minimum, Aspidium trifoliatum var. minimum, Sagenia lobata, T. lobata, T. minima
Name authority (Willdenow) Proctor & Lourteig: Bradea 5: 386. (1990)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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