Marattiaceae — Angiopteris evecta Systematik Reich: Pflanzen (Plantae) Abteilung: Gefäßpflanzen … Deutsch Wikipedia
Marattiaceae — Marattiales Ordre des Marattiales Famille des Marattiaceae … Wikipédia en Français
Marattiaceae —. Maratiáceas Clasificación científica … Wikipedia Español
Marattiaceae — Marattiopsida Mule s foot fern (Angiopteris evecta) Scientific classification Kingdom … Wikipedia
Marattiaceae — ▪ fern family the giant fern family, the only family of the fern order Marattiales. The family contains four genera and some 150 modern species of large tropical and subtropical ferns with stout, erect stems. The leaves (fronds) may be very… … Universalium
Marattiaceae — noun constituting the order Marattiales: chiefly tropical eusporangiate ferns with gigantic fronds • Syn: ↑family Marattiaceae • Hypernyms: ↑fern family • Member Holonyms: ↑Marattiales, ↑order Marattiales • … Useful english dictionary
family Marattiaceae — noun constituting the order Marattiales: chiefly tropical eusporangiate ferns with gigantic fronds • Syn: ↑Marattiaceae • Hypernyms: ↑fern family • Member Holonyms: ↑Marattiales, ↑order Marattiales • Mem … Useful english dictionary
Marattiales — Marattiaceae Angiopteris evecta Systematik Reich: Pflanzen (Plantae) Unterreich … Deutsch Wikipedia
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Arabic Bulgarian Chinese Croatian Czech Danish Dutch English Estonian Finnish French German Greek Hebrew Hindi Hungarian Icelandic Indonesian Italian Japanese Korean Latvian Lithuanian Malagasy Norwegian Persian Polish Portuguese Romanian Russian Serbian Slovak Slovenian Spanish Swedish Thai Turkish Vietnamesedefinitions - angiopteris
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1. highly variable species of very large primitive ferns of the Pacific tropical areas with high rainfalldefinition (more) synonyms - angiopteris
report a problemanalogical dictionary Angiopteris From Wikipedia, the free encyclopedia
Angiopteris is a genus of huge evergreen ferns from the Marattiaceae family, found in the tropical Pacific. They feature a large, erect, woody rhizome with a wide base supported by thick roots. The fronds are deltoid, pinnate, 5–8 metres (16–26 ft) long, with spreading leaflets.
The basal chromosome number for this genus is 2n=80. The type species is Angiopteris evecta .References
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Angiopteris evecta is the type species of the genus Angiopteris . It was originally described as Polypodium evectum by Georg Forster in 1786,  before being reclassified and given its current binomial name in 1796 by Georg Franz Hoffmann.  The species name is the Latin adjective evectus "swollen" or "inflated",  probably a reference to its huge, bulbous pulvini. Common names include giant fern, king fern, oriental vessel fern, and mule's foot fern. In the Malay speaking nations ( Indonesia. Malaysia. Singapore. Brunei and Timor Leste ) it is called "Paku Gajah" (Elephant Fern).
The huge mature fronds measure up to 9 metres (29.5 ft) long. These largest ones are apparently found in Queensland where the lamina or blade can be up to 23 feet (7 meters) in length with the petiole or stalk being an additional 6' 6" (2 meters) long.  29' 6" (9 meter) fronds have also been reported for the variety A. e. teysmanniana in Java. The succulent petioles, again in Queensland, can be up to four in (10 cm) thick,  and in the variety A e. microura of the Solomon Islands the petiole can be up to 8' 9" (2.7 meters) in length,  joined to the trunk or caudex by a pulvinus which can be up to 8 in (20 cm) thick  that serves to raise and lower the frond in response to weather conditions. This is the largest pulvinus of any known plant. At the base of each frond, surrounding the pulvinus like two catcher's mits, is a pair of fleshy stipules. A plant of the variety A. e palmiformis, native to the Philippines but growing at the Lyon Arboretum, Oahu, Hawai'i in June 1987 had stipules up to 9.25 inches (23.5 cm) long by 5.75 inches (14.6 cm) wide.  These are the largest stipules of any known plant. The fronds originate from a large thick rootstock, or caudex typically up to 150 cm (60 in) high, but occasionally as much as ten feet (3 meters) in height.  and up to 3.25 feet (one meter)   or perhaps even 6' 7" (2 meters)  in thickness. An individual with 29' 6" (9 meter) fronds emerging from a caudex 18 inches (45 cm) thick could potentially have a crown spread of 61 feet (18.6 meters), the greatest of any tree fern.
Angiopteris evecta can be grown in well-drained moist sites in the garden with some shade. It is very difficult to propagate by spores but the stipules from the frond base can be removed and will form a new plant in around a year in a medium of sand and peat. References [ edit ]
Coverage: 1876-1991 (Vol. 2, No. 1 - Vol. 152, No. 4)
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Subjects: Science & Mathematics, Botany & Plant Sciences, Biological Sciences, Environmental Science
Collections: Biological Sciences Collection, Life Sciences Collection, Corporate & For-Profit Access Initiative Collection, Ecology & Botany I Collection
1. The general internal structure of the stem of Angiopteris evecta consists of two main regions, the cortical and central vascular. The relatively thick cortex is traversed by leaf traces and roots. The central region consists of a vascular strand which appears crescent-shaped in cross-section and is imbedded in a central parenchyma tissue. This strand gives off root steles and leaf traces. In addition, commissural and medullary strands appear in the central region. 2. The leaf traces are given off from one edge of the central strand, and this contribution is always from the same edge in the same plant. On about the same level that the leaf trace leaves the central strand a root is attached on the outer side of the other edge. The contribution thus made to the leaf traces is made good on the opposite edge in two ways, by an increase in the vascular tissue on the edge itself, and by the addition of commissural strands. 3. The commissural strand originates from the free edge of the leaf trace after the latter is freed from the central strand, and passes to the opposite edge of the central strand and fuses with it. 4. By a continual loss of tissue from one edge and an addition on the other the central strand assumes a spiral condition. This condition is due to the spiral succession of leaves. 5. In the older stages a medullary strand appears on the inner side of the central strand opposite the upper level of a root junction. This crosses the central parenchyma tissue and fuses with the commissural strand before the latter has fused with the central strand. After fusion has taken place, the medullary strand passes upward on the inner side of the central strand, fused to the latter but retaining its identity, until the root junction has been cleared, when it frees itself and repeats its course across the central parenchyma. 6. Each leaf trace is definitely related to one root. The root which appears almost opposite a leaf trace corresponds to the next leaf above. In the early stages each leaf trace appears directly above its corresponding root; but in the later stages the leaf trace is displaced to the right or left, as the case may be, of its corresponding root, due to the spiral condition of the central strand. 7. The leaf traces at first are single, but later bifurcate in the stipular region, but anastomose beyond. The point of forking moves closer and closer to the central strand. Further forking and anastomosing of the leaf trace take place in the more advanced stages. 8. One strand from each side of the leaf trace goes to the lobes of the stipule. Branches from this strand supply the stipular lobes with vascular tissue. 9. All the stipular strands end blindly except the lowest or main strand, which is terminated by a procambial strand originating from a group of meristematic cells on the inner side of the edge of the stipule. This group of cells probably helps to build up the fleshy stipule. 10. The absence of cauline procambium and the definite relation between roots and leaves suggest that the vascular tissue of the central region is a sympodium of leaf traces, and most if not all of the central strand is of foliar origin.Notes and References
This item contains 13 references.
BREBNER, G. On the anatomy of Danaea and other Marattiaceae. Ann. Botany 16:517-552. pIs. 22, 23. 1902.
CAMPBELL, D. H. The embryo and young sporophyte of Angiopteris and Kaulfussia. Ann. Jard. Bot. Buitenzorg 3:69-82. 1910.
—, The eusporagiate ferns. Carnegie Publ. 140. 1911.
data regenerated on Wed, 22 Feb 2017 13:43:01 -0500
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