Tectaria heracleifolia |
Tectaria fimbriata |
|
---|---|---|
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 |
FL; TX; Mexico; Central America; West Indies in Antilles; South America to Peru
|
FL; Mexico in Yucatán; West Indies in Bahamas; Greater Antilles |
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 | ||
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) |
Web links |