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Leaflets of Botanical Observation and Criticism
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could this wild rose be Rosa adenocarpa Greene?
It was found growing on a hill side in Douglas county Oregon, along cow creek after a forest fire.
it has 8 or 9 petals unlike the ground rose that has 5 petals.
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#1 of 3 posted
29 OCT 16 by
 Jay-Jay
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... something went wrong, but wasn't able to delete the post.
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#2 of 3 posted
31 OCT 16 by
Darrell
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The rose is not R. spithamea (you had asked me a few days ago in a personal email) of which "adenocarpa" may be a form, but R. adenocarpa Green is an unresolved name (so far not accepted). Either way, the flowers are too large, the leaves are very unlike, the growth habit appears unlike spithemea, etc.
It seems to be a semi-double; if so, it may be a bee or wind hybridized rose with R. nutkana as one parent. I suggest this because of the petal color, the sharp serrations of the leaves, and the round receptacle. (R. nutkana is common in the countryside of Oregon.) The receptacle in the photo shows glands or setae, but those of R. nutkana are smooth.
On the other hand, much of your photos remind me of R. x kochiana (the bud, the flower, the receptacle) except for the leaves, which on R. x kochiana are rather shiny.
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Thank you for the reply. It is a strange rose.
I went looking for the rose last week in the same place that one was growing but found nothing. it is like they came up after the fire, bloomed and then died.
I will look for them again in the spring.
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