one the last places i managed to visit before i left japan back in march was the miho museum.
it was an interesting building in an amazing natural setting.
and they had some natural dyes (as well as a few other traditional crafts) displayed in the gift shop.
'dry indigo': the japanese says 'kansou aiba' which means, dried leaves of the 'ai' or japanese indigo (polygonum) plant.
'indigotin' (which i believe is actually what is found in all varieties of indigo): the japanese says 'sukumo,' which is actually the specific name for the 'ai' leaves that are fermented as part of the traditional japanese indigo dye process. more info here.
the top left is 'miscanthus tinctorius' or 'kari yasu' in japanese (a reed that produces a yellow dye). the top right is 'philodendron' or 'kihada' (the bark produces a yellow dye). the small cones in forefront are labled 'yasha' in japanese only...my best guess is that these are the alder cones used for brown dyes described here ...although there seems to be some discrepancy with the kanji used and the meanings of these characters.
a lot of this is my best (non-native-speaker) guessing. if you know more or better, please feel to share. mostly, i was impressed and delighted to find this sort of display, that included the dyestuff itself, the japanese name for it in both kanji and phonetic kana, and english!!