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Aspidotis densa (Brack.) Lellinger  
Family: Pteridaceae
[Allosorus densus (Brack.) O. Kuntze, moreCheilanthes siliquosa Maxon, Cryptogramma crispa var. castanea Farw., Cryptogramma densa (Brack.) Diels, Hemionitis densa (Brackenr.) Christenh., Onychium densum Brack., Pellaea densa (Brack.) Hook.]
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Patrick Alexander
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Alan R. Smith in Flora of North America (vol. 2)
Leaves monomorphic or often somewhat dimorphic, 8--25 cm; fertile leaves more erect than sterile leaves, long-petioled, petioles often 2--5 times longer than blades, fertile blades with more ascending pinnae and narrower segments than sterile blades. Blade 3--4-pinnate, 2--10 cm, somewhat leathery. Ultimate segments linear, 3--8 mm; midrib prominent abaxially. Sori of mature blades continuous along length of segments except at apex; indusia linear, margins with 10--35, shallow, regular teeth or erose. 2 n = 60. Slopes, crevices, rocky outcrops, often on serpentine, sometimes in chaparral; 300--3400 m; B.C., Que.; Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
Vascular plants of NE US and adjacent Canada
Lvs clustered on the much-branched rhizome, usually all alike and fertile, the sterile lvs, when present, few and smaller than the fertile and with somewhat smaller, relatively broader, sharply toothed or incised segments; petioles castaneous, 4-18 cm, commonly longer than the blade; fertile blade 2.5-7 cm, a third to fully as wide, often deltoid, tripinnate, the rachis proximally dark like the petiole, distally greenish; pinnae mostly 4-7 offset pairs, the lowest ones the largest; ultimate segments numerous and crowded, ±confluent, linear or elliptic-linear, 3-12 cm נ1-2 mm, tapering to a cartilaginous-mucronate tip; sori set on the indusial flap near its line of junction with the unmodified part of the reflexed margin; 2n=60. Cliff-crevices and moist, rocky slopes; cordilleran region of w. U.S., and locally on serpentine in s. Ont. and Que. (Cryptogramma d.; Pellaea d.; Cheilanthes siliquosa)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
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Patrick Alexander
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Patrick Alexander
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Patrick Alexander
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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.