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Questions, Answers and Comments by Category
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Possibly a parent of the CA60 rose listed in several studies regarding blackspot resistance at Agricultural and Agri-Food Canada’s (AAFC) Morden Manitoba research station.
CA60 is listed as:
"‘CA60’ (23104FR2) was an experimental rose developed at the Agricultural and Agri-Food Canada’s (AAFC) Morden Manitoba research station from the 50 cross ‘RSM 104’ × ‘Frontenac’."
The serials for most of these newer hybrids tend to read as batch set (23) seed parent (104) pollen parent (FR) and seedling # of batch set. A ton of hybrids from their codes now read this way.
Anyway, this rose is probably responsible for some of their BS resistance breeding, so important to take note of. CA60 is not listed on HMF. If they gave a photo of CA60, I would go to the effort of asking for it to be listed, but I have no idea of its stats or looks. Based on the seedlings shown, I would imagine its a pink-red and double type.
The fact that Rosa multiflora is mentioned a lot in these studies leads me to believe its possible that 104 is a close, dwarf, repeating descended of selections to parse out black spot resistance since Rosa multiflora is a known source of widely varying resistances.
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I was taken by the photos uploaded this morning. If any grower can add any more information on this foundling, we will add it to the main page. Are they red pedicels I see? What colour is the new, and mature, wood? Does it set hips? Any photos? Does it mostly look like sempervirens, or a multiflora, or an Ayrshire?
The long drooping foliage probably holds the answer to this one. Leaf colour (new)? (Mature)? Leaf texture or surface? Mature size of whole average leaf? Is the end leaf size the same, or smaller or larger, than the others? Is the leaf stipule glandular, or smooth? Photo? Leaf rachis - prickles under? Leaflet petioles - on short stalks, or no stalks? How held?
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Photos from others seem to give "bred out of 'Serendipity'" vibes. Year bred would line up with this.
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If I was told this was a 19th century French Tea Rose I wouldn't doubt it, that is, just going by the photos here.
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#1 of 1 posted
yesterday by
jedmar
The volatile components are closest to Comtesse de Labarthe and Gloire de Dijon.
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