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Myriopteris aurea (Poir.) Grusz & Windham   (redirected from: Cheilanthes bonariensis (Willd.) Proctor)
Family: Pteridaceae
[Acrostichum bonariense Willd., moreCheilanthes bonariensis (Willd.) Proctor, Cheilanthes ferruginea Willd. ex Link, Hemionitis bonariensis (Willd.) Christenh., Notholaena aurea (Poir.) Desv., Notholaena bonariensis (Willd.) C. Chr., Notholaena chiapensis Rovirosa, Notholaena rufa Presl, Notholaena rufa var. major C.Presl, Notholaena rufa var. minor C.Presl, Pellaea ferruginea (Willd. ex Link) Nees, Pteris aurea Poir.]
Myriopteris aurea image
Patrick Alexander
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Michael D. Windham
Eric W. Rabe in Flora of North America (vol. 2)
Stems short-creeping to compact, usually 4--8 mm diam.; scales bicolored, with broad, well-defined, dark, central stripe and narrow, light brown margins, narrowly lanceolate, slightly contorted, strongly appressed, persistent. Leaves clustered, 10--60 cm; vernation noncircinate. Petiole dark brown, rounded adaxially. Blade linear, pinnate-pinnatifid throughout, 1--4 cm wide; rachis rounded adaxially, lacking scales, with dense monomorphic pubescence. Pinnae articulate at swollen, hirsute nodes, basal pair slightly smaller than adjacent pair, ± equilateral, appearing hirsute adaxially. Costae absent. Ultimate segments elongate-deltate to ovate, not especially beadlike, the largest 1--7 mm, abaxially densely tomentose, adaxially hirsute. False indusia marginal, weakly differentiated, 0.05--0.25 mm wide. Sori ± continuous around segment margins. Sporangia containing 32 spores. n = 2 n = 90, apogamous. Sporulating summer--fall. Rocky slopes and ledges; found on a variety of substrates though rarely observed on limestone; 1200--2400 m; Ariz., N.Mex., Tex.; Mexico; West Indies; Central America; South America. Cheilanthes bonariensis has been assigned to Notholaena in past treatments. It is distantly related (at best) to the species here included in Notholaena , however, and we concur with R. M. Tryon and A. F. Tryon (1982) that it should be transferred to Cheilanthes . Chromosomal studies (G. J. Gastony and M. D. Windham 1989) suggest that C . bonariensis is an apogamous triploid that arose through autopolyploidy. Further investigation is necessary to determine whether 64-spored, sexually reproducing populations of C . bonariensis are still extant.

Myriopteris aurea
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Patrick Alexander
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Patrick Alexander
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Patrick Alexander
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Patrick Alexander
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Patrick Alexander
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Patrick Alexander
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Patrick Alexander
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Patrick Alexander
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Dill, Isabel
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Dill, Isabel
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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.