Question: Between Alisma and Ludwigia, which genus is spread more widely around the world?
Sentence (from "Alisma"): The flowers are hermaphrodite, and are arranged in panicles, racemes, or umbels. "Alisma" flowers have six stamens, numerous free carpels in a single whorl, each with 1 ovule, and subventral styles.
Relevant evidence: Yes