The topic Hyeniales is discussed in the following articles:

annotated classification

  • TITLE: Equisetopsida (plant class)
    SECTION: Annotated classification
    †Order Hyeniales (Protoarticulatae)Extinct shrublike plants, with short, forked leaves in whorls; 1 family: Hyeniaceae (now placed with the Polypodiopsida—true ferns—by...


  • TITLE: Equisetopsida (plant class)
    SECTION: General features
    ...jointed stems. In the Sphenophyllales, an extinct order of scrambling sphenophytes, the leaves were wedge-shaped, with a repeatedly forking (dichotomous) venation system (sphenophylls). The order Hyeniales included shrublike plants with inconspicuous leaves arranged in rather indistinct whorls.