Original sentence: Rheum species are herbaceous perennials with hermaphrodite flowers, consisting of a colored perianth, composed of six to nine segments, arranged in two rows.The flowers have nine stamina inserted on the torus at the base of the peranthium, they are free or subconnatent at their base.The fruits are a three-sided achene with winged sides, the seeds are albuminous and have straight embryos.The ovary is simple and triangular shaped with three styles
Edited sentence: Rheum species are herbaceous perennials  growing from fleshy roots.The anthers are yellow or pinkish green, elliptic in shape.The flowers have nine (sometimes six) stamina inserted on the torus at the base of the peranthium, they are free or subconnatent at their base.The fruits are a three-sided achene with winged sides, the seeds are albuminous and have straight or curved embryos.The hermaphrodite flowers consist of a whitish green to pinkish green, hairless and campanulate perianth, composed of six tepals.The inflorescences are terminal and panicle-like with pedicels.The name has its origin in the Greek word rheon, which was used by Dioscorides, possibly for a plant in this genus.The outer three tepals are narrower than the inner three and all are sepal-like in appeaance.The ovary is simple and triangular shaped with three erect or deflexed styles.The stigmas are head-like.They have persistant or decidous ocrea.They have upright growing stems and mostly basal, decidouse leaves