April, 2014 Plant hunt summary

A record cold winter has resulted in a late spring with most flowering plants blooming 2 - 3 weeks behind schedule.  With only 41 species observed in April we matched the last late spring with 43 species recorded in 2007.  That means floristically, southern Ontario hasn't experienced such a cool and late spring in 7 years.  Trilliums (Trillium spp.) are only just beginning to bloom, when in normal years, they would be in full bloom by now - i.e., May 1st.  The only flowering plant observed that didn't seem to be affected by the late spring was the ephimeral Harbinger of spring (Erigenia bulbosa).

Harbinger of spring (Erigenia bulbosa)

Photo: Brian Popelier

Rare plant surveys began with provincially rare Harbinger of spring (ranked S3 in Ontario by the Natural Heritage Information Centre) on April 13th with a total of 116 plants counted in Elgin county.  An age structure analysis revealed 44 two-leaved plants, which are more mature and tend to produce 2 or more flowering stalks.  This population will be revisited later this month to count the total number of flowers that have gone to seed and if any new, younger plants have emerged.  A number of rare plant surveys will be carried out this year within the Grand River watershed on behalf of the Grand River Conservation Authority.

A total of 221 plants were observed in April across 6 counties, Brant, Elgin, Haldimand, Hamilton, Oxford and Norfolk.  All 403 Elgin county records were donated to the Otter Valley Naturalists (OVN) for their Elgin County Natural Heritage Inventory (NAI), which is hosted by Carolinian Canada Coalition.  A master plant species list of all plants observed in Elgin county since the inception of the EARTHQUEST Plants of Ontario database in 2006 was donated to OVN for the Elgin county NAI.  This amounted to 17,022 records; 127 families, 417 genera, 758 species, or taxa (7 varieties, 7 hybrids); 104 regionally rare (Ecoregion 7E), 102 locally rare (Elgin county), 22 provincially rare, 9 Species at Risk (provincial & federal).  The OVN will use the EARTHQUEST master plant list of Elgin county to build the official list for the NAI.

New records for the county of Oxford in April, 2014 were Cutleaf toothwort (Dentaria concatenata), Giant blue cohosh (Caulophyllum giganteum) and Plantain leaved sedge (Carex plantaginea).

To view the April, 2014 monthly summary report please go to; http://earthquestcanada.ca/April2014summary.pdf