Sentence Examples


  • Using Calamites as a generic name for all those Calamarian stems in which the ribs alternate at the nodes, we have, on Weiss's system, the following sub-genera: Stylocalamites, branches rare and irregularly arranged; Calamitina, branches in regular verticils, limited to certain nodes, which surmount specially short internodes; Eucalamites, branches present on every node.
  • Here, as in the previous genus, sterile and fertile verticils are ranged alternately on the axis of the cone.
  • Weiss first showed, immediately below the verticils of bracts, the position thus being the reverse of that in Palaeostachya.
  • Which in structure resembles the vegetative stem in its primary condition, bears numerous verticils of bracts, those of each verticil being coherent in their lower part, so as to form a disc or cup, from the margin of which the free limbs of the bracts arise.
  • In diameter; the stout axis bears numerous whorls of compound sporophylls, the members of successive verticils being superposed.
 

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