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Matteuccia Todaro

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Description from Flora of China

Pteretis Rafinesque.

Rhizome robust, erect or oblique, covered with brown lanceolate scales. Fronds tufted. Stipe and rachis grooved adaxially. Sterile lamina bipinnatifid and apex pinnatifid, elliptic-oblanceolate to oblanceolate, papery or thinly papery, subglabrous or with few hairs or scales on rachis and costae; pinnae alternate, sessile, narrowly lanceolate, pinnatifid to 1/2; lobes oblique, oblong to elliptic, subentire or subserrate; veins free, pinnate, veinlets reaching lamina margin. Fertile lamina smaller than sterile lamina; lamina pinnate, elliptic to broadly oblanceolate; pinnae linear, alternate, subsessile, much inrolled into brown cylinders, concealing sori. Sori globose, with raised receptacles, borne at ends of veinlets, indusiate; sporangia spheroidal, slenderly stalked, annulus longitudinal, consisting of ca. 40 thick-walled cells; spores elliptic, perispore transparent, slightly folded.

One species: temperate zone of the N Hemisphere.


 

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Photos by The Biodiversity of the Hengduan Mountains Project  
  • Image File (David Boufford)
  • Image/JPEG
  • Image File (David Boufford)
  • Image/JPEG

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