undifferentiated

adjective
  1. 1

    Not differentiated.

  2. 2

    Describes tissues where the individual cells have not yet developed mature or distinguishing features, or describes embryonic organisms where the organs cannot be identified.

  3. 3

    Describes a plant body where the vascular tissue has not developed, as in the thallophytes

Source: https://en.wiktionary.org/wiki/undifferentiated