Macrothelypteris torresiana |
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Mariana maiden fern, swordfern, Torres' fern |
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Stems | short-creeping, thick, to 10 mm diam. |
Leaves | monomorphic, evergreen, 60–150 cm. |
Petiole | to 75 cm × 3–12 mm, glaucous when living. |
Blade | 2–3-pinnate, to ca. 85 cm. |
Pinnae | to 35 × 10(–17) cm; pinnules sessile to adnate, oblique, 2–8 × 0.8–2.5 cm, incised almost to costule into oblique segments 2–4 mm wide, segments entire to dentate or pinnatifid; veins forked or simple. |
Sori | round, indusia small, less than 0.3 mm diam., glabrous or glandular; sporangia with minute capitate glands near annulus. |
Indument | abaxially of septate hairs 1–2 mm on costae and costules; rachis, costae, and blade tissue with capitate glands 0.05 mm. |
2n | = 124. |
Macrothelypteris torresiana |
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Habitat | Terrestrial in damp woods and along stream banks |
Elevation | 0–100 m [0–300 ft] |
Distribution |
AL; AR; FL; GA; LA; MS; SC; TX; s Mexico; Central America; West Indies in the Antilles; South America to n Argentina; native to tropical and subtropical Asia; Africa [Introduced in North America]
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Discussion | The name Dryopteris setigera (Blume) Kuntze has been misapplied to plants in the flora. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. |
Parent taxa | |
Synonyms | Polystichum torresianum, Dryopteris uliginosa, Thelypteris torresiana, Thelypteris uliginosa |
Name authority | (Gaudichaud Beaupré) Ching: Acta Phytotax. Sin. 8: 310. (1963) |
Web links |