familyThelypteridaceae
genusThelypteris
subgenusThelypteris subg. Cyclosorus
speciesThelypteris kunthii
Difference between revisions of "Thelypteris kunthii"
Contr. U.S. Natl. Herb. 38: 53. 1967.
Common names: Widespread maiden fern southern shield fern
Basionym: Nephrodium kunthii Desvaux
Synonyms: Christella normalis (C. Christensen) HolttumDryopteris normalis C. ChristensenThelypteris macrorhizoma R. P. St. JohnThelypteris normalis (C. Christensen) MoxleyThelypteris saxatilis R. P. St. JohnThelypteris unca R. P. St. John
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>short- to long-creeping, 4–8 mm diam. <b>Leaves</b> monomorphic, evergreen, up to 2(–3) cm apart, (15–)50–160 cm. <b>Petiole</b> straw-colored, (5–)20–80 × (1–)3–6 mm, at base with brown, linear-lanceolate, hairy scales. <b>Blade</b> (9–)30–80 cm, broadest at base, gradually tapered to pinnatifid apex. <b>Pinnae</b> (2–)8–15(–20) × (0.6–)1–2.5 cm, incised 3/5–4/5 of width; segments oblong, rounded to acute at apex; proximal pair of veins from adjacent segments running to sinus, or nearly so. <b>Indument</b> abaxially of hairs mostly 0.3–1 mm on costae, veins, and blade tissue; veins adaxially with similar hairs but blade tissue usually without hairs, often with scattered yellowish, stalked glands 0.1 mm. <b>Sori</b> round, medial to supramedial; indusia tan, hairy, hairs 0.2–0.4 mm; sporangial glands obscure, yellowish, stalked, arising from sporangial stalks. <b>2n</b> = 144.</span><!-- |
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|subgenus=Thelypteris subg. Cyclosorus | |subgenus=Thelypteris subg. Cyclosorus | ||
|species=Thelypteris kunthii | |species=Thelypteris kunthii | ||
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Revision as of 13:17, 27 July 2019
Stems short- to long-creeping, 4–8 mm diam. Leaves monomorphic, evergreen, up to 2(–3) cm apart, (15–)50–160 cm. Petiole straw-colored, (5–)20–80 × (1–)3–6 mm, at base with brown, linear-lanceolate, hairy scales. Blade (9–)30–80 cm, broadest at base, gradually tapered to pinnatifid apex. Pinnae (2–)8–15(–20) × (0.6–)1–2.5 cm, incised 3/5–4/5 of width; segments oblong, rounded to acute at apex; proximal pair of veins from adjacent segments running to sinus, or nearly so. Indument abaxially of hairs mostly 0.3–1 mm on costae, veins, and blade tissue; veins adaxially with similar hairs but blade tissue usually without hairs, often with scattered yellowish, stalked glands 0.1 mm. Sori round, medial to supramedial; indusia tan, hairy, hairs 0.2–0.4 mm; sporangial glands obscure, yellowish, stalked, arising from sporangial stalks. 2n = 144.
Habitat: Roadsides, ditches, riverbanks, woodlands, limestone sinks
Elevation: 0–100 m
Distribution
Ala., Ark., Fla., Ga., La., Miss., S.C., Tex., e, s Mexico, West Indies, Bermuda, Central America to Costa Rica, South America from Colombia to n Brazil.
Discussion
Thelypteris kunthii occasionally hybridizes with T. augescens and T. ovata in Florida; hybrids with T. hispidula may also occur.
Selected References
None.
Lower Taxa
None.