Gleicheniaceae

  • Rolla M. Tryon
  • Alice F. Tryon

Abstract

Stem very long-creeping, slender, freely branched, protostelic or siphonostelic, indurated, bearing trichomes and (or) scales; leaves ca. 30 cm to 10 m or more long and scrambling or climbing, lamina and its branches (except the ultimate ones) usually pseudodichotomous, indeterminate, with a permanently arrested bud at the fork of the branches, or the lamina partially pinnately branched, the rachis and sometimes the pinna-rachis with a periodically dormant bud between the last developed branches, a pair of accessory segments sometimes present at the base of a pair of otherwise usually naked axes, small stipular segments sometimes associated with the laminar buds, or rarely the lamina (more often the pinnae), wholly pinnately branched and determinate, ultimate segments confined to the ultimate branches or also present on the axes of a lower order, leaf with trichomes and (or) scales, circinate in the bud, petiole without stipules; sporangia borne in exindusiate sori on the abaxial surface of the ultimate segments, with a short, many-rowed stalk of cells, with a central to oblique or nearly apical annulus not interrupted by the stalk; homosporous, spores lacking chlorophyll.

Keywords

Chlorophyll Cretaceous Stratification Posit Peri 

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Literature

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Literature

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Literature

  1. Holttum, R. E. 1973. On the typification of Mertensia Willd. non Roth (Gleicheniaceae) with notes on Sticherus Presl and Hicriopteris Presl. Taxon 22: 447–450.CrossRefGoogle Scholar
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Copyright information

© Springer-Verlag New York Inc. 1982

Authors and Affiliations

  • Rolla M. Tryon
    • 1
  • Alice F. Tryon
    • 1
  1. 1.Harvard University HerbariaCambridgeUSA

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