Complex sentence: The upright stems were generally less than 2.5 mm in diameter; a reconstruction suggests a height of around 20 cm. Aerial stems branched dichotomously in a three-dimensional pattern, with the last two sets of branches bearing sporangia.
Split into simpler sentences: The upright stems were generally less than 2.5 mm in diameter. They branched dichotomously in a three-dimensional pattern, with the last two sets of branches bearing sporangia.