| Cyathea javanica | ||||||||||||||||
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| Cyathea javanica Blume, 1828 |
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Cyathea javanica is a species of tree fern native to western Java and Sumatra, where it grows in rain forest and on riverbanks at an altitude of 250-1500 m. In Scientific nomenclature, synonyms are different Scientific names used for a single Taxon. The order Cyatheales is a Taxonomic division of the Fern subclass Cyatheatae, which includes the tree ferns. Java (Jawa is an Island of Indonesia and the site of its Capital city Jakarta. Sumatra (also spelled Sumatera) is the sixth largest island in the world (approximately 470000 km² and is the largest island entirely in Indonesia (two The trunk of this plant is erect and up to about 10 m tall. Fronds may be bi- or tripinnate and 2-3 m in length. A frond is a large Leaf with many divisions to it and the term is typically used for the leaves of palms Ferns or Cycads A frond is Pinnate is a term used to describe Feather -like or multi-divided features arising from both sides of a common axis in Plant or Animal structures and comes Pinnate is a term used to describe Feather -like or multi-divided features arising from both sides of a common axis in Plant or Animal structures and comes The stipe is spiny and bears scattered scales throughout. In Botany, a stipe is a supportive structure that may be the stem-like part of the thallus of a Seaweed or a true leaf stem as in Ferns In most biological nomenclature a scale ( Greek lepid, Latin squama) is a small rigid plate that grows out of an Animal These scales are dark and have fragile edges. C. javanica has round sori which are borne near the midvein of fertile pinnules . "Sori" redirects here For the commune in Italy see Sori Italy; for the villages in Azerbaijan see Soru and Sors Azerbaijan. SpecialShortpages.-- They are protected by firm, flat indusia that are saucer-like in appearance. "Sori" redirects here For the commune in Italy see Sori Italy; for the villages in Azerbaijan see Soru and Sors Azerbaijan.
C. javanica appears to be most closely related to Cyathea doctersii. Cyathea doctersii is a species of tree fern endemic to Sumatra, where it grows in forest at an altitude of approximately 150 m Large and Braggins (2004) note that C. doctersii may in fact be of hybrid origin between C. In Biology, hybrid has two meanings The first meaning is the result of interbreeding between two animals or plants of different taxa. javanica and a member of the Cyathea latebrosa complex. Cyathea latebrosa is a common and widespread species of tree fern native to Indochina.
When Carl Blume described C. javanica he also named one variety, C. j. var. rigida. Braggins and Large (2004) note that "although variety rigida is apparently part of the C. javanica complex, the name has also occasionally been associated with Cyathea polycarpa".
References
- Braggins, John E. & Large, Mark F. 2004. Tree Ferns. Timber Press, Inc. , p. 149. ISBN 0-88192-630-2
- The International Plant Names Index: Cyathea javanica
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