1930, Botanical author Diels .............related links... Botanical ClassificationSeries Ruthenicae(Diels) Lawrence A group of plants within the Section Limniris with rounded capsules less then 1.5 cm long, with three valves which curl back quickly releasing the seed, seed pear-shaped with a fleshy appendage. Diels in Engl. & Prantl, Nat. Pflanzenfam. Aufl. (1930); G.H.M. Lawrence in ‘A reclassification of the genus Iris' in Gentes Herbarium 8:346 (1953), New York. The following are included in this series Iris caespitosa Pallas. Iris ruthenica Ker-Gawl