P414Ho, chert from the Altenburg-Nobitz gravel pit, detail
Fig.3: Diarch aerial roots as this one, with exarch protoxylem
and surrounding cortex, may
belong to several different vines, as Ankyropteris, Tubicaulis [1] or Sphenophyllum
[2].
leg. SCHLESIER/Leukersdorf, coll. KRETZSCHMAR/Chemnitz