Macrothelypteris torresiana

(Gaudichaud Beaupré) Ching
Acta Phytotax. Sin. 8: 310. 1963.
Common names: Torres's fern Mariana maiden fern
IntroducedIllustrated
Basionym: Polystichum torresianum Gaudichaud-Beaupré Voy. Uranie 8: 333. 1828
Synonyms: Dryopteris uliginosa (Kunze) C. Christensen Thelypteris torresiana (Gaudichaud-Beaupré) Alston Thelypteris uliginosa (Kunze) Ching
Treatment appears in FNA Volume 2.

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. Indument abaxially of septate hairs 1–2 mm on costae and costules; rachis, costae, and blade tissue with capitate glands 0.05 mm. Sori round, indusia small, less than 0.3 mm diam., glabrous or glandular; sporangia with minute capitate glands near annulus. 2n = 124.


Habitat: Terrestrial in damp woods and along stream banks
Elevation: 0–100 m

Distribution

V2 240-distribution-map.gif

Introduced; Ala., Ark., Fla., Ga., La., Miss., S.C., Tex., s Mexico, West Indies in the Antilles, Central America, South America to n Argentina, native to tropical and subtropical Asia, Africa.

Discussion

The name Dryopteris setigera (Blume) Kuntze has been misapplied to plants in the flora.

Selected References

None.

Lower Taxa

None.

Alan R. Smith +
(Gaudichaud Beaupré) Ching +
Polystichum torresianum +
Torres's fern +  and Mariana maiden fern +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, S.C. +, Tex. +, s Mexico +, West Indies in the Antilles +, Central America +, South America to n Argentina +, native to tropical and subtropical Asia +  and Africa. +
0–100 m +
Terrestrial in damp woods and along stream banks +
Acta Phytotax. Sin. +
Introduced +  and Illustrated +
Dryopteris uliginosa +, Thelypteris torresiana +  and Thelypteris uliginosa +
Macrothelypteris torresiana +
Macrothelypteris +
species +