A Review of
with Contributor's Notes
Canada's Cacti Genera and Species
This Review confirms that there are two cacti genera indigenous to Canada namely:
A single Escobaria is confirmed, namely:
In additon, Escobaria missouriensis was reported in 1961 by Hitchcock et al. (See Ref. 4), but has not been located since, despite much searching. It is likely therefore that Escobaria vivipara is the sole Escobaria native to Canada today.
Please note, until a recent taxonomic change, Escobaria vivipara and Escobaria missouriensis were known as Coryphantha vivipara and Coryphantha missouriensis respectively.
On the other hand three species of Opuntia have been located and identified, namely:
In addition a sterile Opuntia hybrid, hypothesized to be O. fragilis x O. polyacantha, has been confirmed in Canada (See Refs. 17 & 18).
Five different provinces are the home of two or more of these species of cacti. From West to East these are:
*Copyright © 1998 by Ken Hancock
Copyright © 2012
Ottawa and Area Cactus & Succulent Group
Ottawa, Ontario, Canada