Lythrum salicaria was NOT FOUND

The flowers on the plant have died in the matter of 2 to 3 weeks so that means that the flower that I found days in late September early October.
The plant 90 C tall, and they have a lot of branches on one stem and there are a lot of stems on it. The bottom of the plant is brown and dead and on the top of the plant is green but its turning into a brownish color.

The flowers are brown with a little bit of white in the middle of the flower. Also the seeds that are in the flower are a really dark color sorta like a blackish color, they are really small seeds to they are about only a centimeter long.

The plant dies quickly without a water because it has only been in my journal for a week with out sun and water but the little tiny leaves that are on the plant are not fully dead yet but the flowers and seeds are dead and they get blown away easily because they don’t have any weight to them.