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Gymnocarpium
Family: Cystopteridaceae
Gymnocarpium image
  • FNA
  • Gleason & Cronquist
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Kathleen M. Pryer in Flora of North America (vol. 2)
Plants terrestrial. Stems long-creeping, stolons absent. Leaves monomorphic, dying back in winter. Petiole ca. 1.5--3 times length of blade, base not swollen; vascular bundles 2, lateral, ± oblong in cross section. Blade broadly deltate, ternate, or ovate, 2--3-pinnate-pinnatifid, reduced distally to pinnatifid apex, herbaceous. Pinnae weakly articulate to rachis but persistent, segment margins entire to crenate; proximal pinnae longest, petiolulate, usually ± inequilateral with pinnules on basiscopic side longer than those on acroscopic side; costae adaxially grooved, grooves not continuous from rachis to costae; indument lacking or of minute (0.1 mm) glands abaxially and sometimes along costae adaxially. Veins free, simple or forked. Sori in 1 row between midrib and margin, ± round; indusia absent. Spores brownish, rugose. x = 40.
Vascular plants of NE US and adjacent Canada
Petiole stramineous with a dark base, slender, longer than the blade, sparsely scaly at the base, with two vascular bundles free to the apex; blade deltoid or pentagonal, 2-3 times pinnate; lower pinnae distinctly the largest, articulate at the base, long-petiolulate and inequilateral; veins free, forking, reaching the margin; sori on the anterior vein-branches; indusium none; rather small, delicate ferns with long, branched, scaly rhizomes and scattered, thin, deciduous lvs, the old petiole-bases not persisting. 6, N. Amer., Eurasia, and the Pacific Islands.

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.
Gymnocarpium appalachianum
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Gymnocarpium brittonianum
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Gymnocarpium disjunctum
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Gymnocarpium dryopteris
Image of Gymnocarpium dryopteris
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Gymnocarpium heterosporum
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Gymnocarpium intermedium
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Gymnocarpium jessoense
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Gymnocarpium robertianum
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NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.