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{{Short description|Species of cycad}}
{{Taxobox
{{Speciesbox
| color = lightgreen
| image = 藍葉蘇鐵 Cycas cairnsiana -澳洲國家植物園 Australian National Botanic Gardens, Canberra- (11046187955).jpg
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| name = ''Cycas cairnsiana''
| status = NT
| status = VU
| status_system = IUCN3.1
| trend = stable
| status_ref = <ref name="iucn status 20 November 2021">{{cite iucn |author=Hill, K.D. |date=2010 |title=''Cycas cairnsiana'' |volume=2010 |page=e.T41972A10614004 |doi=10.2305/IUCN.UK.2010-3.RLTS.T41972A10614004.en |access-date=20 November 2021}}</ref>
| regnum = [[Plant]]ae
⚫
| genus = Cycas
| divisio = [[Cycad]]ophyta
⚫
| species = cairnsiana
| classis = [[Cycad]]opsida
⚫
| authority = [[Ferdinand von Mueller|F.Muell.]]
| ordo = [[Cycad]]ales
| familia = [[Cycas|Cycadaceae]]
⚫
| genus = ''[[Cycas]]''
| species = '''''C. cairnsiana'''''
| binomial = ''Cycas cairnsiana''
⚫
| binomial_authority = [[Ferdinand von Mueller|F.Muell.]]
}}
}}


'''''Cycas cairnsiana''''' is a species of [[cycad]] in the genus ''[[Cycas]]'', native to northern [[Australia]] in northern [[Queensland]] on the [[Newcastle Range]].
'''''Cycas cairnsiana''''' is a species of [[cycad]] in the genus ''[[Cycas]]'', native to northern [[Australia]] in northern [[Queensland]] on the Newcastle Range.


The stems grow to 2-5 m tall and 12-16 cm diameter, with swollen base. The [[leaf|leaves]] are dark orange-brown tomentose on emerging, then glaucous blue-green and glabrous with age, 60-110 cm long, bowed, keeled, pinnate, with 180-220 leaflets, the leaflets 8-18 cm long and 2-4 mm wide. The [[petiole]]s are 18-27 cm long, and armed with sharp spines.
The stems grow to 2–5 m tall and 12–16&nbsp;cm diameter, with swollen base. The [[leaf|leaves]] are dark orange-brown tomentose on emerging, then glaucous blue-green and glabrous with age, 60–110&nbsp;cm long, bowed, keeled, pinnate, with 180-220 leaflets, the leaflets 8–18&nbsp;cm long and 2–4&nbsp;mm wide. The [[Petiole (botany)|petiole]]s are 18–27&nbsp;cm long, and armed with sharp spines.


The female [[strobilus|cones]] are open, with [[sporophyll]]s 16-21 cm long, with two to four ovules per sporophyll. The lamina is narrowly triangular, with toothed margins and an apical spine. The [[sarcotesta]] is yellow-brown with a waxy coating, the [[sclerotesta]] ovoid and flattened. The male cones are solitary, ovoid, 16-20 cm long and 7-10 cm diameter, brown, and with an upturned apical spine.
The female [[strobilus|cones]] are open, with [[sporophyll]]s 16–21&nbsp;cm long, with two to four ovules per sporophyll. The lamina is narrowly triangular, with toothed margins and an apical spine. The [[sarcotesta]] is yellow-brown with a waxy coating, the [[sclerotesta]] ovoid and flattened. The male cones are solitary, ovoid, 16–20&nbsp;cm long and 7–10&nbsp;cm diameter, brown, and with an upturned apical spine.


It is named after [[William Cairns]], governor of Queensland from 1875–1877.
It is named after [[William Cairns]], governor of Queensland from 1875–1877.


===Habitat===
==Habitat==
It grows in dry, rocky, and open woodland terrain on soils derived from granite. Its range is limited to the Newcastle Range of northeast Queensland, with seasonal rainfall of about 1350 mm. This cycad is a close relative of both ''[[Cycas couttsiana]]'' and ''[[Cycas platyphylla]]''. The plants are remarkable for their intense blue colour, and their resiliance to the seasonal extremes of their native range. Its conservation status is near-threatened.
It grows in dry, rocky, and open woodland terrain on soils derived from granite. Its range is limited to the Newcastle Range of northeast Queensland, with seasonal rainfall of about 1350&nbsp;mm. This cycad is a close relative of both ''[[Cycas couttsiana]]'' and ''[[Cycas platyphylla]]''. The plants are remarkable for their intense blue colour, and their resilience to the seasonal extremes of their native range. Its conservation status is near-threatened.


==References==
==References==
{{Reflist}}
*[http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/cycadpg?taxname=Cycas+cairnsiana Cycad Pages: ''Cycas cairnsiana'']
*[http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/cycadpg?taxname=Cycas+cairnsiana Cycad Pages: ''Cycas cairnsiana''] {{Webarchive|url=https://web.archive.org/web/20130510020143/http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/cycadpg?taxname=Cycas+cairnsiana |date=2013-05-10 }}
*[http://www.iucnredlist.org/search/details.php/41972/all IUCN Redlist: ''Cycas cairnsiana'']


{{Taxonbar|from=Q5197922}}
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[[Category:Cycads]]

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[[Category:Cycas|cairnsiana]]
[[Category:Cycadophyta of Australia]]
[[Category:Endemic flora of Australia]]
[[Category:Flora of Queensland]]
[[Category:Flora of Queensland]]
[[Category:Near threatened flora of Australia]]
[[Category:Nature Conservation Act vulnerable biota]]
[[Category:Vulnerable flora of Australia]]
[[Category:Near threatened biota of Queensland]]
[[Category:Taxa named by Ferdinand von Mueller]]

Latest revision as of 12:15, 1 January 2024

Cycas cairnsiana
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Family: Cycadaceae
Genus: Cycas
Species:
C. cairnsiana
Binomial name
Cycas cairnsiana

Cycas cairnsiana is a species of cycad in the genus Cycas, native to northern Australia in northern Queensland on the Newcastle Range.

The stems grow to 2–5 m tall and 12–16 cm diameter, with swollen base. The leaves are dark orange-brown tomentose on emerging, then glaucous blue-green and glabrous with age, 60–110 cm long, bowed, keeled, pinnate, with 180-220 leaflets, the leaflets 8–18 cm long and 2–4 mm wide. The petioles are 18–27 cm long, and armed with sharp spines.

The female cones are open, with sporophylls 16–21 cm long, with two to four ovules per sporophyll. The lamina is narrowly triangular, with toothed margins and an apical spine. The sarcotesta is yellow-brown with a waxy coating, the sclerotesta ovoid and flattened. The male cones are solitary, ovoid, 16–20 cm long and 7–10 cm diameter, brown, and with an upturned apical spine.

It is named after William Cairns, governor of Queensland from 1875–1877.

Habitat[edit]

It grows in dry, rocky, and open woodland terrain on soils derived from granite. Its range is limited to the Newcastle Range of northeast Queensland, with seasonal rainfall of about 1350 mm. This cycad is a close relative of both Cycas couttsiana and Cycas platyphylla. The plants are remarkable for their intense blue colour, and their resilience to the seasonal extremes of their native range. Its conservation status is near-threatened.

References[edit]

  1. ^ Hill, K.D. (2010). "Cycas cairnsiana". IUCN Red List of Threatened Species. 2010: e.T41972A10614004. doi:10.2305/IUCN.UK.2010-3.RLTS.T41972A10614004.en. Retrieved 20 November 2021.
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