There are a row of street trees on the south side of Euclid Ave in Collingwood Community. The leaf edge have serration on the upper half. I cannot find thorn!? Thanks.
You didn't say where on Euclid, but the only Crataegus listed on that street on the city's database is Crataegus crus-galli; they give the common name of thornless cockspur hawthorn. The Vancouver Trees App | UBC Botanical Garden mentions that there is a thornless selection of that species. The species is supposed to have "shiny, dark green blight-resistant leaves", so seems likely. For the hawthorn vs crab-apple question, both are edible - you could always eat into one to see what the seeds are like.
Again, I don't have the exact location, but these trees on Euclid (google street view) could be in the running - it would be more likely to see hawthorns as street trees than red chokeberries (no Aronia are on the database listing). As well, the leaf margins match the hawthorns shown in a google search.
