The overlap of the prefixes and roots makes these terms a particularly confusing subset of botanical nomenclature.Sporophylls vary greatly in appearance and structure, and may or may not look similar to sterile leaves.[1] Lycophytes, where sporophylls may be aggregated into strobili (Selaginella and some Lycopodium and related genera) or distributed singly among sterile leaves (Huperzia).However, unlike these other groups, ovules are produced on cone scales, which are modified shoots rather than sporophylls.Equisetum always produce strobili, but the structures bearing sporangia (sporangiophores) have been interpreted as modified stems.