蒲 - bullrush, flag, cattail

dandelion (esp. species Taraxacum platycarpum)

round cushion used for Zen meditation (traditionally made of woven bulrush leaves)

zabuton (flat floor cushion used when sitting or kneeling; usu. rectangular)

gristly fish paste (made of muscle, tendons, skin, etc.)

gladiolus

something that comes too late to be useful; iris (blooming) on the 6th (i.e. one day too late for the Boy's Day celebration)

quilting; ticking

feigning ignorance; feigning naivety; pretense of innocence

Leibnitz daisy (Leibnitzia anandria)

cattail pollen (used in traditional Chinese medicine)

common cattail (Typha latifolia); broadleaf cattail; common bulrush; great reedmace

wooly frogsmouth (Philydrum lanuginosum); wooly waterlily