ðɪ ɛkstˈɜːnəl maɪsˈiːliəm ɡˈɪvz ɹˈaɪz tə ʃˈɔːɹt, ɪɹˈɛkt kənˈɪdɪˌɑːfoːɹz, ˈiːtʃ əv wˌɪtʃ bˈɛɹ ɐ sˈɪŋɡəl ɹˈoʊ ʌv bˈæɹəlʃˈeɪpt spˈoːɹz, ðə jˈʌŋɡɪst bˌiːɪŋ æt ðə bˈeɪs ðɪ ɐfˈɛktᵻd pˈɑːɹts bɪkˌʌm ðˈʌs kˈʌvɚd wɪð ɐ fˈɔːɹɪst ʌv kənˈɪdɪˌɑːfoːɹz ɐsˈuːmɪŋ ɐ wˈaɪt pˈaʊdɚɹi ɐpˈɪɹəns.
The external mycelium gives rise to short, erect conidiophores, each of which bear a single row of barrel-shaped spores, the youngest being at the base (the affected parts become thus covered with a forest of conidiophores assuming a white powdery appearance).