Rahul Sharma (Editor)

Drepanophycales

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Kingdom
  
Plantae

Class
  
Lycopodiopsida

Division
  
Lycopodiophyta

Rank
  
Order

Drepanophycales httpsuploadwikimediaorgwikipediacommonsthu

Similar
  
Protolepidodendrales, Asteroxylon, Drepanophycus, Baragwanathia, Zosterophyllopsida

Drepanophycales is an order of extinct plants of the Division Lycopodiophyta of ?Late Silurian to Late Devonian age (around 430 to 360 million years ago), found in North America, China, Russia, Europe, and Australia. Sometimes known as the Asteroxylales or Baragwanathiales.

Contents

Description

Extinct terrestrial vascular plants of the Silurian to Devonian periods. Stem of the order of several mm to several cm in diameter and several cm to several metres long, erect or arched, dichotomizing occasionally, furnished with true roots at the base. Vascular bundle an exarch actinostele, tracheids of primitive annular or helical type (so-called G-type). Stem clothed in either microphylls (leaves with a single vascular thread or 'vein'), or with leaf-like enations (unvascularized projections) with a vascular trace into the base of each enation. Homosporous, with sporangia borne singly and dehiscing by a single slit.

List of families

  • Drepanophycaceae
  • stem with microphylls
  • Asteroxylaceae
  • stem with unvascularized enations
  • References

    Drepanophycales Wikipedia