Gymnocarpium altaycum

Interesting Facts

Description

Genus Gymnocarpium

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.

Species 8: north temperate regions , North America, Eurasia .[1]

Taxonomy

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Domain: Eukaryota () - Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Plantae () - Haeckel, 1866 - Plants
  - Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
    - Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
      - Subphylum: Euphyllophytina ()
        Infraphylum: Moniliformopses () - Kenrick & Crane, 1997, Nom. Nud.
        Class: Polypodiopsida () - Cronquist et al.
        Order: Polypodiales () - Link
        Family: Woodsiaceae () - (Chapm.) Herter
        Genus: Gymnocarpium () - Newman, 1851 - Oak fern [Greek gymnos, naked, and karpos, fruit, referring to the absence of indusia]
        Specific epithet: altaycum - Chang Y.Yang
        Botanical name: - Gymnocarpium altaycum Chang Y.Yang