perennial,biannual, or weed? - Knowledgebase Question

dublin, oh
Question by romaine
July 4, 2006
plant with 4 stems, random, softleaves,at top of plant is white flame-like shaped cluster flower. graduates larger from stamen to smaller at tip. plant is growing and is about 21/2 feet tall. Beautiful clusters. Bees love it!!!Is this some type of phlox or Euphorbia? Found growing between day lillies. I am concerned whether is poisonous volunteer plant. Don't recall planting myself. Can you help? I await your reply, thanks!! Romaine


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Answer from NGA
July 4, 2006

0

Unfortunately, based on your description I am not certain what plant you have. Here is a photo of a variegated, annual euophorbia that grows from seed; it has a milky sap that can cause dermatitis which is a good identifying characteristic. You may need to cut and paste the complete url into your browser to make it work correctly.

http://seeds.thompson-morgan.c...

Here is a photo of a phlox that shows the typical flower shape and foliage and stem quite well, although this one is pink.

http://www.missouriplants.com/...

It might also be the notorious garlic mustard (Alliaria petiolata, A. officinalis) which smells like garlic when crushed and is a biennial, although it is more of a spring bloomer. To stop it from spreading, deadhead to prevent it from seeding.

http://www.botany.wisc.edu/wis...

If none of these look correct, you might take a photo, both close up of the bloom and an overall shot of the plant and consult with your local professionally trained nurseryman and/or your county extension. Since you are not certain what it is, do not let it set seed in case it could spread invasively. I'm sorry I can't be more specific for you.

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