Growth on woody stems

We are located in Region 7, on the TN River. I have rosemary in my garden, along with a butterfly bush. Both of them do well except that one year the rosemary was killed by great cold. The butterfly bush comes back every year. However, I noticed that both bushes grow, on the thin woody branches, a sort of “wing” (for lack of a better word) on the sides of the stem. I’ve asked many gardener friends and none of them can ID it. I also noticed it on an old rose bush I’d marked for destruction. What is it and what can I do about it? All I do now is trim the branch off.

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1 Comment To "Growth on woody stems"

#1 Comment By BushDoctor On 02/17/2018 @ 7:24 pm

I am not sure by your description. Could you include a photo? This can help me to better identify what is going on.

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