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Riella
''Riella'' is a genus in the liverwort family Riellaceae, and includes about eighteen species. Plants in the genus are small and grow submerged in shallow temporary pools. Although the genus is widely distributed in the Northern Hemisphere, locating populations is often difficult. Its occurrence is sporadic and local, and the tiny plants are ephemeral. The ornamented spores remain viable for several years, allowing the plants to survive annual drying of their habitat. The plants are easily grown in laboratory cultures. Description ''Riella'' plants are small, usually or less, and thalloid, with an appearance like an immature alga. The plant consists of an erect central axis ("stem") that is commonly forked, but only sparingly, and the plants are bright green. The stem bears a thin dorsal lamina or "wing", which being on only one side gives the plant an asymmetrical appearance. This lamina is ruffled or undulate. Early descriptions of the species '' Riella helicophylla'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riellaceae
Sphaerocarpales is an order of plants within the liverworts. Approximately twenty species are in this order which is sub-divided into four families: Monocarpaceae, Sphaerocarpaceae and Riellaceae, as well as the extinct family Naiaditaceae. The inclusion of the Naiaditaceae is uncertain, and the family has sometimes been assigned to the Calobryales. Classification Living taxa and species count based on Söderström et al. 2016 and synonyms from ''Collection of genus-group names in a systematic arrangement''. * Monocarpaceae D.J.Carr ex Schelpe 1969 ** '' Monocarpus '' D.J.Carr 1956 non Post & Kuntze 1903 'Carrpos'' Proskauer 1961 * Riellaceae Engl. 1892 ** '' Austroriella'' Cargill & J.Milne2013 ** '' Riella'' Mont. 1852 'Duriaea'' Bory De St. Vincent & Montagne 1843 non Durieua Merat 1829; ''Maisonneuvea'' Trevisan 1877; ''Duriella'' Bory de St. Vincent ex Billot 1861(about 18 spp.) * Sphaerocarpaceae Sphaerocarpaceae is a family of liverworts known as bottle live ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |