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Pellaea cordifolia (Sessé & Moc.) A. R. Sm.   (redirected from: Pellaea cordata (Cav.) J. Sm.)
Family: Pteridaceae
[Adiantum cordifolium Sessé & Moc., moreAllosorus cordatus (Cav.) Presl, Cassebeera cordata (Cav.) Kaulf., Hemionitis cordifolia (Sessé & Moc.) Christenh., Notholaena cordata (Cav.) Keys., Pellaea cardiomorpha Weath., Pellaea cordata (Cav.) J. Sm., Pellaea cordata var. cordata , Pellaea sagittata var. cordata (Cav.) A.F.Tryon, Platyloma cordata (Cav.) J. Sm., Pteris cordata Cav.]
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Michael D. Windham in Flora of North America (vol. 2)
Stems compact, ascending, stout, 6--10 mm diam.; scales uniformly orange-brown and thin, lanceolate to ovate, largest scales 0.3--1 mm wide, margins dentate. Leaves somewhat dimorphic, sterile leaves shorter than fertile leaves, clustered on stem, 15--50 cm; croziers not conspicuously pubescent, densely scaly. Petiole straw-colored, tan, or gray, not lustrous, rounded or slightly flattened adaxially, without prominent articulation lines. Blade ovate-deltate, 2-pinnate proximally, 5--20 cm wide; rachis tan throughout, straight to slightly flexuous, rounded or flattened adaxially, glabrous. Pinnae perpendicular to rachis or slightly ascending, not decurrent on rachis, usually with 3--15 ultimate segments; costae straight to slightly flexuous, 25--100 mm, longer than ultimate segments. Ultimate segments round-cordate to deltate-cordate, 5--15 mm, herbaceous to leathery, glabrous or puberulent; margins recurved on fertile segments, covering less than 1/2 abaxial surface, borders whitish, crenulate; apex rounded or retuse. Veins of ultimate segments usually evident. Sporangia short-stalked, containing 64 spores, not intermixed with farina-producing glands. 2 n = 58. Sporulating summer--fall. Rocky slopes and ledges, usually on volcanic substrates; 1000--2500 m; Tex.; Mexico. The diploid Pellaea cordifolia has often been treated as a variety of the Central American and South American apogamous triploid, P . sagittata . The two taxa are distinguished by a number of qualitative morphologic features (A. R. Smith 1980), and it seems unlikely that they represent cytotypes of a single species. A. F. Tryon (1957) suggested that P . sagittata may have originated through hybridization between P . ovata and P . cordifolia (as P . sagittata var. cordata ).

Pellaea cordifolia
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The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.
The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.