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Psilotaceae

  • K. U. Kramer
Chapter
Part of the The Families and Genera of Vascular Plants book series (FAMILIES GENERA, volume 1)

Abstract

Small to medium-sized, often epiphytic plants with subterranean, dichotomously to laterally branched stems with endophytic mycorrhiza, without roots, and aerial, simple or dichotomously branched stems; stele protostelic, or solenostelic at the transition of subterranean and aerial stem. Aerial stems green, erect or pendulous, glabrous, slender, angular to sulcate or flattened, the basal part often with rudimentary leaves, the upper part leafy; leaves spirally arranged or distichous, flaccid or firm, narrow, simple or once forked, one-veined or veinless. Sporangia sessile on or above the base of forked sporophylls, thick-walled (eusporangiate), 2- or 3-celled and -lobed, each cell dehiscing longitudinally with a slit. Spores numerous, small, achlorophyllous, pale, bean-shaped, monolete. Gametophyte subterranean, heterotrophic.

Keywords

Branch System Epiphytic Plant Aerial Branch Lycopodium Clavatum High Taxonomic Rank 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • K. U. Kramer

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