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Dasygrammitis Purpurascens
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasygrammitis Mollicoma
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grammitis
''Grammitis'' (dwarf polypody) is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It had formerly been placed in the family Grammitidaceae, but this family is no longer recognized by most authors because phylogenetic analyses of DNA sequences have shown that it is embedded in Polypodiaceae.Harald Schneider, Hans-Peter Krier, Rosemary Wilson, and Alan R. Smith. 2006. "The Synammia Enigma: Evidence for a Temperate Lineage of Polygrammoid Ferns (Polypodiaceae, Polypodiidae) in Southern South America". ''Systematic Botany'' 31(1):31-41. The delimitation of ''Grammitis'' was drastically narrowed in the first decade of the 21st century. It now contains about 25 species. In 2003, a study of the distribution of grammitid ferns placed 11 species in the New World, 7 in Africa, and 4 in the Pacific.Barbara S. Parris. 2003. "The distribution of Grammitidaceae (Filicales) inside an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasygrammitis Purpurascens
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasygrammitis Malaccana
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasygrammitis Kinabaluensis
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasygrammitis Fuscata
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasygrammitis Crassifrons
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasygrammitis Brevivenosa
''Dasygrammitis'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is known from Sri Lanka through southeast Asia and the Philippines to Polynesia. Description The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of stipes, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges. Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually pinnate in cutting, rarely pinnatifid or bipinnatifid, bearing free veins which lack hydathodes at their terminus. Sori are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the sporangia either lack hairs or have one to two red-brown hairs. Taxonomy The genus was first described by Barbara Parris in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synapomorphy
In phylogenetics, an apomorphy (or derived trait) is a novel character or character state that has evolved from its ancestral form (or plesiomorphy). A synapomorphy is an apomorphy shared by two or more taxa and is therefore hypothesized to have evolved in their most recent common ancestor. ) In cladistics, synapomorphy implies homology. Examples of apomorphy are the presence of erect gait, fur, the evolution of three middle ear bones, and mammary glands in mammals but not in other vertebrate animals such as amphibians or reptiles, which have retained their ancestral traits of a sprawling gait and lack of fur. Thus, these derived traits are also synapomorphies of mammals in general as they are not shared by other vertebrate animals. Etymology The word —coined by German entomologist Willi Hennig—is derived from the Ancient Greek words (''sún''), meaning "with, together"; (''apó''), meaning "away from"; and (''morphḗ''), meaning "shape, form". Clade analysis T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |