Ottawa Valley Native Plant Directory
A reference of 1,211 plant species native within a 100 km radius of Parliament Hill, Ottawa — plus plants native to eastern North America that have naturalized in our region. Compiled from iNaturalist observations, Dan Brunton's Flora of Ottawa, and GBIF records.
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How to read this table
Sun (1-5)
1Deep shade (conifer or mixed conifer forest)
2Spring sun (hardwood forest; shaded in summer)
3Part shade / part sun
4Mostly sunny (6+ hrs)
5Full sun (8+ hrs direct sun)
Multiple values = tolerates a range
Water / Moisture (1-7)
1Very dry (xeric, sandy/rocky soils)
2Dry (well-drained, low organic matter)
3Dry-mesic (slightly dry but not harsh)
4Mesic (average, well-drained loam)
5Moist (consistently moist, not wet)
6Wet (saturated soils, seasonal flooding)
7Aquatic (standing or slow-moving water)
Rarity Ranks (Wild Species 2020)
N/SN = national, S = provincial
1Critically imperiled (≤5 populations)
2Imperiled (6-20 populations)
3Vulnerable (21-100 populations)
4Apparently secure
5Secure (common and widespread)
?Unranked or uncertain
Other columns
BloomMonths when the plant flowers
RarityCA/ON/QC — red = rare, green = secure
WildlifeHummingbirds, Monarch, pollinators, birds
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📚 Sources & Data Credits
Regional Flora
Brunton, D.F. 2005. Appendix A: Vascular Plants of the City of Ottawa, Ontario, with Identification of Regionally Significant Species. In: Urban Natural Areas Environmental Evaluation Study: Final Report. Muncaster Environmental Planning and Brunton Consulting Services. Environmental Management Division, City of Ottawa.
Biodiversity Observations & Databases
- iNaturalist — used to validate regional presence and frequency of species observations
- Global Biodiversity Information Facility (GBIF) — aggregated occurrence records from multiple institutional datasets
- VASCAN — Database of Vascular Plants of Canada (Canadensys) — authoritative checklist used with Canadensys occurrence search to validate species names and regional presence — canadensys.net/occurrence/search
- Wild Species 2020: The General Status of Species in Canada — Canadian Endangered Species Conservation Council. 2022. National General Status Working Group — source for national and provincial conservation ranks (CA, ON, QC)
Pollinator & Ecological Interaction Data
- Xerces Society for Invertebrate Conservation — regional and North American pollinator plant lists and conservation resources
- HOSTS — A Database of the World's Lepidopteran Hostplants — Lepidopteran (butterfly & moth) host plant records, filtered for Canadian interactions