We do not ever recall having flowers blooming this late in the year.
Observation
These were seen in Golovin this week. We do not ever recall having flowers blooming this late in the year. Carol Oliver
LEO says: This looks very similar to the common yarrow (Achillea millefolium L.) range occurs throughout the United States. The plants stem is angular and rough, the leaves alternate, 3 to 4 inches long and 1 inch broad, clasping the stem at the base, bipinnatifid, the segments very finely cut, giving the leaves a feathery appearance. The plant has a relatively short life. We are unable to identify the second photo "Plant is blooming." This observation has been shared with the UAF Cooperative Extension Service.
Cooperative Extension Service Consult: The picture is a bit blurry for me to identify that plant. Odd though that they are seeing plants blooming into October. If it is in a warm location like planter boxes that will help retain heat and help the plants bloom later. It looks like these plants may be in something like a planter box, or near a building or other structure that is providing some extra heat. Gino Graziano, Invasive Plants Instructor, University of Alaska Fairbanks
Resources
Alaska Wildflowers.us – Achillea millefolium L., known as "common yarrow", "soldiers woundwort" and "bloodwort". It was used to staunch the flow of blood. The leaves are variable. Blooming time quite variable. June -September.
USDA NRCS National Plant Data Center – Common yarrow is a drought tolerant species of which there are several different ornamental cultivars. Plant the seeds no more than ¼ inch deep due to the need of light for germination. The seeds also require a temperature range of 65-75 degrees Fahrenheit. Common yarrow responds best to soil that is poorly developed and well drained. (Source: USDA Natural Resources Conservation Service - Plant Guide, Common Yarrow Achillea millefolium L.)