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!Thelypteridaceae Ching ex Pic. Serm. Search in IPNISearch in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Webbia 24: 709. 1970. (28 Apr 1970) (Webbia) Name publication detail
 

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THELYPTERIDACEAE (Marsh Fern Family)

Plants perennial, homosporous, with rhizomes. Leaves variously lobed to compound, usually with stiff, needlelike hairs. Veins free (anastomosing elsewhere), branched. Sori globose to ellipsoid, produced along the veins. Indusia round to kidney-shaped or absent. Sporangia with the annulus an interrupted, vertical ring of cells. Gametophytes green, flat, obcordate to kidney-shaped, usually hairy or glandular. Three genera, about 900 species. Nearly worldwide, but most diverse in tropical regions.

Generic delimitations within the Thelypteridaceae remain controversial. Although various groups of related species are relatively well defined, various authors have recognized 1–30 genera, with varying numbers of subgenera. The present treatment follows that of Smith (1993) in the Flora of North America, which includes three genera for North America north of Mexico. Of these, two are present in Missouri. The third genus, Macrothelypteris (H. Itô) Ching, contains species native to the Old World tropics, one of which has become naturalized in the southeastern United States.

 

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1.Leaf blades triangular in outline, 2 times deeply pinnately lobed, the primary lobes mostly connected by wings of tissue along the rachis, the lowermost divisions sometimes free (the leaf thus truly compound)
Phegopteris
1.Leaf blades lanceolate in outline, 1 time pinnately compound, the pinnae not connected to each other by wings of tissue along the rachis, deeply, pinnately lobed
Thelypteris
 
 
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