The pollen-carrying hairs on their legs (the scopa) are unbranched or nearly so, to accommodate the exceptionally large, coarse pollen of the host plants.
ðə pˈɑːləŋkˈæɹiɪŋ hˈɛɹz ˌɔn ðɛɹ lˈɛɡz ðə skˈoʊpə ɑːɹ ʌnbɹˈæntʃt ɔːɹ nˌɪɹli sˈoʊ, tʊ ɐkˈɑːmədˌeɪt ðɪ ɛksˈɛpʃənəli lˈɑːɹdʒ, kˈoːɹs pˈɑːlən ʌvðə hˈoʊst plˈænts.