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Hydrostachyaceae
''Hydrostachys'' is a genus of about 22 species of flowering plants native to Madagascar and southern and central Africa. It is the only genus in the family Hydrostachyaceae. All species of ''Hydrostachys'' are aquatic, growing on rocks in fast-moving water. They have tuberous roots, usually Leaf#Divisions of the lamina .28blade.29, pinnately compound leaves, and highly reduced flowers on dense spikes.Albach, D. C., Soltis, D. E., Chase, M. W., and Soltis, P. S. (2001). Phylogenetic placement of the enigmatic angiosperm ''Hydrostachys''. Taxon 50, 781-805. Phylogenetic placement of ''Hydrostachys'' is particularly problematic. Due to its specialized aquatic morphology, it has often been grouped with other aquatic plants, such as the family Podostemaceae. However, embryological, floral, and other morphological characters do not support this placement, and molecular data suggest that ''Hydrostachys'' is related to taxa in the order Cornales. Its position in Cornales is uncertain; it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornales
The Cornales are an order of flowering plants, early diverging among the asterids, containing about 600 species. Plants within the Cornales usually have four-parted flowers, drupaceous fruits, and inferior to half-inferior gynoecia topped with disc-shaped nectaries. Taxonomy In the classification system of Dahlgren the Cornales were in the superorder Corniflorae (also called Cornanae). Under the APG IV system, the Cornales order includes these families: * Cornaceae (the dogwood family) * Curtisiaceae (cape lancewood) * Grubbiaceae (the sillyberry family) * Hydrangeaceae (the hydrangea family) * Hydrostachyaceae * Loasaceae (the stickleaf family) * Nyssaceae, (the tupelos) The oldest fossils assigned with confidence to the order are '' Hironoia fusiformis'', described from Coniacian age Japanese coalified fruits, and ''Suciacarpa starrii'' described from American permineralized fruits of Campanian age. Phylogeny The Cornales order is sister to the remainder of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrostachyaceae
''Hydrostachys'' is a genus of about 22 species of flowering plants native to Madagascar and southern and central Africa. It is the only genus in the family Hydrostachyaceae. All species of ''Hydrostachys'' are aquatic, growing on rocks in fast-moving water. They have tuberous roots, usually Leaf#Divisions of the lamina .28blade.29, pinnately compound leaves, and highly reduced flowers on dense spikes.Albach, D. C., Soltis, D. E., Chase, M. W., and Soltis, P. S. (2001). Phylogenetic placement of the enigmatic angiosperm ''Hydrostachys''. Taxon 50, 781-805. Phylogenetic placement of ''Hydrostachys'' is particularly problematic. Due to its specialized aquatic morphology, it has often been grouped with other aquatic plants, such as the family Podostemaceae. However, embryological, floral, and other morphological characters do not support this placement, and molecular data suggest that ''Hydrostachys'' is related to taxa in the order Cornales. Its position in Cornales is uncertain; it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |