Macrothelypteris torresiana (Gaudich.) Ching
EOL Text
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.
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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. 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. 2 n = 124.
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Polystichum torresianum Gaudichaud-Beaupré, Voy. Uranie 8: 333. 1828; Dryopteris uliginosa (Kunze) C. Christensen; Thelypteris torresiana (Gaudichaud-Beaupré) Alston; T. uliginosa (Kunze) Ching
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Terrestrial in damp woods and along stream banks; 0--100m.
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The following is a representative barcode sequence, the centroid of all available sequences for this species.
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
United States
Rounded National Status Rank: NNA - Not Applicable
Rounded Global Status Rank: G5 - Secure
Macrothelypteris torresiana is a species of fern which is native to tropical and subtropical Africa and Asia. It has been introduced into other areas, including large parts of North and South America.[1][2]
The species is assigned to different genera depending on how the family Thelypteridaceae is classified. If the entire family is classified in Thelypteris, it is Thelypteris torresiana. However, molecular data shows an affinity between a group of species which are sometimes classified in Macrothelypteris, Phegopteris, and allied genera,[3] so it is common to remove this species from Thelypteris and classify it as Macrothelypteris torresiana.
M. torresiana contains flavanoids which have been investigated for possible medicinal value.[4]
References
- ^ Macrothelypteris torresiana (Gaudich.) Ching, GRIN taxonomy for plants, accessed September 26, 2011
- ^ Macrothelypteris torresiana (Gaudichaud Beaupré) Ching, Flora of North America
- ^ Smith, Alan R.; Cranfill, Raymond B. (2002), "Intrafamilial Relationships of the Thelypteroid Ferns (Thelypteridaceae)", American Fern Journal 92 (2): 131, doi:10.1640/0002-8444(2002)092[0131:IROTTF]2.0.CO;2
- ^ Fang, W; Ruan, J; Cai, Y; Wei, A; Zhou, D; Zhang, W (2011), "Flavonoids from the aerial parts of Macrothelypteris torresiana", Natural product research 25 (1): 36–9, doi:10.1080/14786411003766888, PMID 21240759
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The name Dryopteris setigera (Blume) Kuntze has been misapplied to plants in the flora.
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