ðə lˈiːvz, wˌɪtʃ mˈɛʒɚɹ ˌʌp tə lˈɔŋ ænd əkɹˈɑːs, ɑːɹ ɔːltˈɜːnət ɔnðɪ ˌʌpɚ stˈɛmz ænd ˈɑːpəzˌɪt ɔnðə lˈoʊɚ stˈɛmz wɛn pɹˈɛzənt.
The leaves, which measure up to  long and  across, are alternate on the upper stems and opposite on the lower stems (when present).