D. grandis may refer to: * Daemonorops grandis, a rattan palm species found in Asia * , a fungus species in the genus Daldinia * Deinodon grandis, a nomen dubium (may refer to Ornithomimus grandis or Aublysodon grandis) * , a tree species in the genus Dendropanax found in the Caribbean * Dryptosauroides grandis, a dinosaur species found in India that lived during the Late Cretaceous