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Cyathea Sect. Alsophila
''Alsophila'' is a genus of tree ferns in the family Cyatheaceae. It has also been considered to be a section in the subgenus ''Cyathea'' of the genus ''Cyathea''. Description Species of ''Alsophila'' have a treelike growth habit, with an erect trunk that rarely branches, or sometimes a more shrublike habit, with a creeping stem. Their fronds are large, with a strawlike stalk (stipe), dark brown or black in colour. Brown or dark brown scales are present, with distinct margins. The blade (lamina) of the frond is divided one to three times (one- to three-pinnate). The sori (spore-producing structures) are rounded and borne on smaller veins on the lower surface of the frond. An indusium (a covering to the sori) may or may not be present; if present initially, it may be lost as the frond ages. ''Alsophila'' is now separated from the other genera in the family Cyatheaceae primarily on the basis of molecular phylogenetic studies. The scales on the stalks (petioles) provide a morphol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsophila Capensis
''Alsophila capensis'', Synonym (taxonomy), synonym ''Cyathea capensis'', (known as the "forest tree fern") is a regionally widespread and highly variable species of Cyatheales, tree fern. It is indigenous to Southern Africa (subsp. ''capensis'') and South America (subsp. ''polypodioides''). Description Both subspecies of ''Alsophila capensis'' have a slender, erect Caudex, trunk that is up to tall (occasionally even ) and about 15 cm in diameter. The fronds are tripinnate, born on long Stipe (botany), stipes (stalks), and 2–3 m in length. The main stem of the leaf (rachis) is smooth to slightly warty and covered in scale (zoology), scales that range from tan to brown or dark brown. The frond stalks are covered with dark brown or black scales. The smallest leaflets (Pinnation, pinnae) have toothed (serrated) margins. The lowest pinnation, pinnae may be separated from the others along the rachis and form a clump around the crown, similar to the "wig" of ''Alsophila ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsophila Abbottii
''Alsophila abbottii'', synonym ''Cyathea abbottii'', is a species of tree fern in the family Cyatheaceae. It is endemic to Hispaniola, where it grows in shaded montane forest at an elevation of 700–1200 m. The trunk is erect and can grow up to 1.6 m in height and 5 cm in diameter. Fronds may reach 1.5 m in length and are pinnate. The rachis is brown and is covered in golden-brown to bicoloured (pale and brown) basal scales. Sori are arranged in two rows along each side of the pinnule midvein. Indusia are rounded and in the shape of a cup. The species is named after William Louis Abbott William Louis Abbott (23 February 1860 – 2 April 1936) was an American medical doctor, explorer, ornithologist and field naturalist. He compiled prodigious collections of biological specimens and ethnological artefacts from around the world, ... (1860-1936), who collected numerous plants on Hispaniola. References abbottii Flora of Haiti Flora of the Dominican Republic Ende ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsophila Alpina
''Alsophila alpina'', synonym ''Cyathea alpicola'', is a species of tree fern native to central Sumatra, where it grows in montane rain forest at an altitude of 2000–2750 m. The erect trunk can reach 5 m or more in height. Fronds are bi- or tripinnate and usually 2–3 m long. They have a tendency to persist on the plant after withering, forming an irregular skirt around the trunk. This species has a spiny stipe, which is covered with a woolly layer of scales. There appear to be two forms with different scales; either dark glossy brown with a broad paler margin and fragile edges, or small, brown and finely fringed. Sori are covered by thin, fragile indusia and occur near the midvein of fertile pinnules. The closest relative of ''A. alpicola'' is thought to be '' Alsophila polycarpa'', which differs by lacking spines altogether. '' Alsophila macropoda'' and '' Alsophila magnifolia'' may also be closely allied with this species. References alpina Alpina Burkard Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsophila Alleniae
''Alsophila alleniae'', synonym ''Cyathea alleniae'', is a species of tree fern native to the Malay Peninsula, where it grows in forest margin on steep ground at an altitude of approximately 1200 m. The trunk is erect, about 4 m tall and 15 cm in diameter. It is usually unbranched, but may branch to form several small crowns. Fronds are bi- or tripinnate and 1–2 m long. The stipe is spiny at the base and at least partially covered by scales. Typically of '' Alsophila'' species, these scales are dark brown, glossy, and have fragile edges. Sori occur near the midvein of fertile pinnules and are covered by firm, brown indusia that resemble scales in appearance. ''A. alleniae'' is named after Betty Molesworth Allen (1913-2002), a collector of Malaysian and Indonesian flora Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsophila Alderwereltii
''Alsophila alderwereltii'', synonym ''Cyathea alderwereltii'', is a species of tree fern endemic to Mount Sago in central Sumatra, where it is nevertheless abundant and grows in forest at an altitude of 1000–1500 m. It has an erect trunk which may be 4 m tall or more. Fronds are bi- or tripinnate and 1–2 m long. The stipe of this species is spiny at the base and covered with scattered scales that are dark brown, glossy, and have a narrow paler margin. Sori are produced near the fertile pinnule midvein and are covered by small, brown scale-like indusia. ''A. alderwereltii'' is named after Cornelis Rogier Willem Carel van Alderwerelt van Rosenburgh (1863-1936), a Dutch pteridologist who worked extensively in the Sunda Sunda may refer to: Europe * Sunda, Faroe Islands India * Sunda (asura), an asura brother of Upasunda * Sunda (clan), a clan (gotra) of Jats in Haryana and Rajasthan, India Southeast Asia * Sundanese (other) ** Sundanese people ... region ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsophila Albidosquamata
''Alsophila albidosquamata'', synonyms ''Cyathea albidosquamata'' and ''Sphaeropteris albidosquamata'', is a species of tree fern native to the Maluku Islands, New Guinea and the Bismarck Archipelago, where it grows in rain forest and montane forest at an altitude of . The trunk is erect and about 2 m tall. Fronds are bi- or tripinnate and 1–1.5 m in length. The lower surface of the rachis is covered in scales and the stipe has scattered scales throughout its length. These are glossy and pale, with dull, fragile edges. Sori occur near the fertile pinnule midvein and have flat indusia A sorus (pl. sori) is a cluster of sporangia (structures producing and containing spores) in ferns and fungi. A coenosorus (plural coenosori) is a compound sorus composed of multiple, fused sori. Etymology This New Latin word is from Ancient Gr ... which resemble small saucers. References albidosquamata Flora of the Maluku Islands Flora of New Guinea Flora of the Bismarck Arch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsophila Acuminata
''Alsophila acuminata'', synonym ''Cyathea acuminata'', is a species of tree fern native to the islands of Panay and Samar in the Philippines. The trunk is erect and 1–4 m tall or more. Fronds are bi- or tripinnate and about 1 m in length. The stipe is covered with scattered scales and spines. The scales are flat and dull brown in colour. Sori are present near the midvein of fertile pinnules and are covered by firm indusia A sorus (pl. sori) is a cluster of sporangia (structures producing and containing spores) in ferns and fungi. A coenosorus (plural coenosori) is a compound sorus composed of multiple, fused sori. Etymology This New Latin word is from Ancient Gr .... References acuminata Flora of the Visayas {{alsophila-plant-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
