Mostly Blue, Pom-Pom Flower Plant Aka Floss Flower
This page is the CodyCross answer for the clue below from Architectural Styles, Group 1176, Puzzle 1 (Reichstag Building).
Question is: Mostly Blue, Pom-Pom Flower Plant Aka Floss Flower
and the answer is: AGERATUM
Word Meaning:
AGERATUM — Any of the genus Ageratum of tropical American herbs, annuals and perennials, from the sunflower family Asteraceae, tribe Eupatorieae; they are sometimes used in floral displays.
Definitions from Wiktionary.