Cycas campestris: Difference between revisions
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| species = '''''C. campestris''''' |
| species = '''''C. campestris''''' |
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| binomial = ''Cycas campestris'' |
| binomial = ''Cycas campestris'' |
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| binomial_authority = K.D.Hill |
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==Description== |
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'''''Cycas campestris''''' is named after the latin word ''camester'', meaning plains or flats, which the cycad grows in. Stems unbranched, erect, growing between 3 to 6 meters. Leaves numerous growing to .8-1.7 m long. Flat shaped with apex terminating in paired leaflets. Emergent leaves deep orange [[tomentose]], [[glabrous]] with maturity. [[Petiole]] [[glabrous]], armed with spikes and 15-50 cm long. Leaflets in 80-115 pairs, angled forward at 60-85 degrees. |
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'''''Cycas campestris''''' is is a species of [[cycad]] in the genus ''[[Cycas]]'', native to southeastern [[Papua New Guinea]] in the lowland region near [[Port Moresby]]. It grows in open, grassy locations, often in areas with frequent grass fires. |
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Female cones open, with sporophylls 13-25 cm long, with pale brown tomentose. 2-6 ovules per sporophyll. Triangular lamina present, with many lateral spines and an apical spine. [[Sarcotesta]] 2-3.5 mm thick and orange. [[Sclerotesta]] flattened and long ovoid, with a network of shallow grooves present. Male cones are solitary and erect, ovoid 13-17 cm long., 7-9 cm in diameter. Apical spine turned sharply upward. |
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The stems are erect, up to 2.5 m tall and 20 cm diameter. The [[leaf|leaves]] are orange tomentose on emerging, soon becoming bright glossy green and glabrous, 80-170 cm long, pinnate, with 120-230 leaflets. The leaflets are 8.5-16 cm long and 5-8 mm wide, and lie flat or in a shallow 'v'-shape on either side of the leaf stem. The leaf [[petiole]]s are 15-90 cm long, and armed with sharp spines at the base. |
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==Habitat== |
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The female [[strobilus|cones]] are open, with [[sporophyll]]s 13-25 cm long, with two to six ovules per sporophyll. The lamina is lanceolate, with spined dentate margins and an apical spine. The male cones are solitary, narrow ovoid, 13-17 cm long and 7-9 cm diameter, brown, the sporophylls 33-40 mm long with an apical spine. |
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This cycad us native to [[Papua New Guinea]], in the low elevations of the southeastern part of the country. Prefers open, grassy locations, where annual grass fires are present. Conservation status of the plant is secure. |
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==References== |
==References== |
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Whitelock, L. M. (2002). The Cycads. Portland, OR: Timber Press |
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*[http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/cycadpg?taxname=Cycas+campestris Cycad Pages: ''Cycas campestris''] |
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*[http://www.iucnredlist.org/search/details.php/42072/all IUCN Redlist: ''Cycas campestris''] |
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[[Category:Cycads]] |
[[Category:Cycads]] |
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Revision as of 18:20, 4 October 2006
| Cycas campestris | |
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| Species: | C. campestris
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| Cycas campestris | |
Description
Cycas campestris is named after the latin word camester, meaning plains or flats, which the cycad grows in. Stems unbranched, erect, growing between 3 to 6 meters. Leaves numerous growing to .8-1.7 m long. Flat shaped with apex terminating in paired leaflets. Emergent leaves deep orange tomentose, glabrous with maturity. Petiole glabrous, armed with spikes and 15-50 cm long. Leaflets in 80-115 pairs, angled forward at 60-85 degrees.
Female cones open, with sporophylls 13-25 cm long, with pale brown tomentose. 2-6 ovules per sporophyll. Triangular lamina present, with many lateral spines and an apical spine. Sarcotesta 2-3.5 mm thick and orange. Sclerotesta flattened and long ovoid, with a network of shallow grooves present. Male cones are solitary and erect, ovoid 13-17 cm long., 7-9 cm in diameter. Apical spine turned sharply upward.
Habitat
This cycad us native to Papua New Guinea, in the low elevations of the southeastern part of the country. Prefers open, grassy locations, where annual grass fires are present. Conservation status of the plant is secure.
References
Whitelock, L. M. (2002). The Cycads. Portland, OR: Timber Press