Amphivasal or leptocentric vascular bundles are found in
Cycas and Dryopteris
Dracaena and Yucca
Helianthus and Cucurbita
Maize and wheat
Vascular bundles in the stem of Cucurbita or Lagenaria are
Aerenchyma is found in
The cork cambium cork and secondary cortex are collectively called :
Vascular bundles are derived from $(originate\ from)$