Ch
- Chaerophyllum — chervils
- Chaerophyllum procumbens var. procumbens — spreading chervil
- Chaerophyllum procumbens var. shortii
- Chamaedaphne — leatherleafs
- Chamaedaphne calyculata — leatherleaf, dwarf cassandra
- Chamaesyce — spurges
- Chamaesyce polygonifolia — seaside spurge, seaside sandmat, sea milk-purslane
- Chamaesyce vermiculata — wormseed spurge, wormseed sandmat, hairy spurge, hairy-stemmed milk-purslane
- Chelone — turtleheads
- Chelone glabra — white turtlehead
- Chenopodium — goosefeet
- Chenopodium bushianum — village goosefoot
- Chenopodium capitatum — strawberry blite, strawberry-spinach, Indian paint, Indian ink, strawberry goosefoot
- Chenopodium foggii — Fogg's goosefoot
- Chenopodium leptophyllum — narrowleaf goosefoot
- Chenopodium pratericola — pale goosefoot, narrowleaf goosefoot, desert goosefoot
- Chenopodium salinum
- Chenopodium simplex — mapleleaf goosefoot, giantseed goosefoot
- Chenopodium standleyanum — Standley's goosefoot
- Chimaphila — pipsissewas
- Chimaphila maculata — striped pipsissewa, striped wintergreen, spotted wintergreen, striped prince's pine Endangered
- Chimaphila umbellata — pipsissewa, prince's pine
- Chrysanthemum — daisies
- Chrysanthemum arcticum — arctic daisy
- Chrysosplenium — saxifrages
- Chrysosplenium americanum — golden saxifrage, American watermat, American golden saxifrage
- Chrysosplenium tetrandrum — alternate-leaf watermat, northern golden saxifrage, northern golden-carpet
Read more about this topic: List Of Canadian Plants By Genus C