Cycas arenicola: Difference between revisions
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| name = ''Cycas arenicola'' |
| name = ''Cycas arenicola'' |
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| status = LC |
| status = LC |
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| trend = |
| trend = |
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| regnum = [[Plant]]ae |
| regnum = [[Plant]]ae |
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| divisio = [[Cycad]]ophyta |
| divisio = [[Cycad]]ophyta |
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| species = '''''C. arenicola''''' |
| species = '''''C. arenicola''''' |
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| binomial = ''Cycas arenicola'' |
| binomial = ''Cycas arenicola'' |
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| binomial_authority = K.D.Hill |
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==Description== |
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'''''Cycas arenicola''''' is a species of [[cycad]] in the genus ''[[Cycas]]'', native to [[Australia]], in the far north of [[Northern Territory]] in the basin of the upper East Alligator River in [[Arnhem Land]]. It grows in [[Eucalyptus]] woodlands on highly [[siliceous]] soils (sandstone derived). They thrive in open situations. |
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'''''Cycas arenicola''''' whose name derives from latin arena and cola, which translates to "sand dweller", indeed thrives in [[sandstone]] habitats. Stems are [[arborescent]], reaching 5 feet in height. leaves are numerous, exceeding 5 feet in length, with [[petiole]] brown and 14 inches in length, armed with spikes. Leaflets in 90-100 pairs, with dark green tops and deep brown undersection. leaflets oriented 60-90 degrees forward without overlapping. |
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The stems reach 1.5 m (rarely 2.5 m) tall, with a diameter of 15-20 cm. The [[leaf|leaves]] are numerous, 0.9-1.6 m long, pinnate with 180-200 leaflets, glossy bright green above, pubescent beneath with brown pubescence, the leaflets are oriented 60-90 degrees forward without overlapping. The [[petiole]] is brown pubescent, 25-35 cm long, armed with spines. |
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==Habitat== |
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Native to the [[Northern Territory]] of [[Australia]], this cycad grows well in the [[Eucalyptus]] woodlands on highly [[siliceous]] soils (sandstone derived). They thrive in open situations, with mild winters. Found common along the reaches of the East Alligator and Liverpool rivers. |
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The name derives from Latin ''arena'' and ''-cola'', "sand dweller", the species growing in [[sandstone]] habitats. |
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First described in 1993 by Hill, the plant is not thought to be threatened as its range occurs on Aboriginal land and is very remote. The plant is dependent on very dry, seasonally variable conditions, and is susceptible to crown rot. |
First described in 1993 by Hill, the plant is not thought to be threatened as its range occurs on Aboriginal land and is very remote. The plant is dependent on very dry, seasonally variable conditions, and is susceptible to crown rot. |
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==References== |
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*[http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/cycadpg?taxname=Cycas+arenicola Cycad Pages: ''Cycas arenicola''] |
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[[Category:Cycads]] |
[[Category:Cycads]] |
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Revision as of 16:34, 19 September 2006
| Cycas arenicola | |
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| Species: | C. arenicola
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| Cycas arenicola K.D.Hill
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Cycas arenicola is a species of cycad in the genus Cycas, native to Australia, in the far north of Northern Territory in the basin of the upper East Alligator River in Arnhem Land. It grows in Eucalyptus woodlands on highly siliceous soils (sandstone derived). They thrive in open situations.
The stems reach 1.5 m (rarely 2.5 m) tall, with a diameter of 15-20 cm. The leaves are numerous, 0.9-1.6 m long, pinnate with 180-200 leaflets, glossy bright green above, pubescent beneath with brown pubescence, the leaflets are oriented 60-90 degrees forward without overlapping. The petiole is brown pubescent, 25-35 cm long, armed with spines.
The female cones open, with sporophylls 15-20 cm long, grey with orange hairs, each with 4-6 ovules. Margins toothed, with bright orange sarcotesta when ripened. The male cones are solitary, spindle shaped, 25 cm long and 9 cm diameter.
The name derives from Latin arena and -cola, "sand dweller", the species growing in sandstone habitats.
First described in 1993 by Hill, the plant is not thought to be threatened as its range occurs on Aboriginal land and is very remote. The plant is dependent on very dry, seasonally variable conditions, and is susceptible to crown rot.