ice plant vs icicle plant

ice plant

noun
  • A succulent annual, Mesembryanthemum crystallinum, of the fig marigold family, having pale pink flowers and fleshy leaves covered with glistening water vesicles. 

  • Any of several plants in fig marigold family, Aizoaceae, which were formerly classified in the genus Mesembryanthemum along with Mesembryanthemum crystallinum. 

  • Especially, Carpobrotus edulis. 

icicle plant

noun
  • A plant in the daisy family,Asteraceae, with long, powdery-white leaves (Helichrysum thianschanicum). 

How often have the words ice plant and icicle plant occurred in a corpus of books? (source: Google Ngram Viewer )