Cycas rumphii
Queen sago | |
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Male plant with strobilus, or cone, at the Berlin Botanic Garden
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Gymnospermae |
Division: | Cycadophyta |
Class: | Cycadopsida |
Order: | Cycadales |
Family: | Cycadaceae |
Genus: | Cycas |
Species: | C. rumphii
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Binomial name | |
Cycas rumphii Miq.
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Distribution | |
Synonyms | |
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Cycas rumphii, commonly known as queen sago or the queen sago palm, is a
Etymology
'Queen sago' alludes to the name 'king sago' given to the related
Description
The cycad is a small tree, growing to about 10 m (33 ft) in height, with a trunk diameter of up to 40 cm (16 in). The bark is grey and distinctively fissured into rectangular, or diamond-shaped, segments. The leaves grow from the crown – bright green, glossy, palm-like fronds, 1.5–2.5 m (4.9–8.2 ft) long, with 150–200 leaflets on each frond. The spiny petiole is 35–60 cm (14–24 in) long. The male plant's strobilus, or cone, is oblong-ellipsoidal, 30–60 cm (12–24 in) long, orange in colour and foetid in odour. The female's megasporophylls are about 30 cm long, fleshy, brown and densely hairy, with the fertile area about 35 mm (1.4 in) wide. The seeds are 45 mm long and 30 mm wide, ripening from green to an orange- or reddish-brown colour.[2][3]
Distribution and habitat
The cycad's range is centred on the Maluku Islands, extending northwards to Sulawesi, eastwards to New Guinea, and westwards to Java and southern Borneo. It also occurs on Christmas Island, an Australian territory in the Indian Ocean 300 km (190 mi) south of Java, in Australia's Top End (Darwin), and in Western Australia.[4] It is cultivated in Fiji and Vanuatu. It is largely a species of tropical closed forest or woodland on calcareous soils in coastal habitats.[2] It is often found on stabilised dunes formed of coralline sand and limestone.[1]
Relationships
C. rumphii is part of a
Uses
The trunk of the cycad contains a starchy pith from which
Status and conservation
Although the species is locally abundant, it is assessed as
References
- ^ a b c Hill, K.D. (2010). "Cycas rumphii". IUCN Red List of Threatened Species. 2010: e.T42081A10623127. Retrieved 26 June 2022.
- ^ a b c Hill, Ken (1998–2004). "Cycas rumphii". The Cycad Pages. Royal Botanic Gardens, Sydney. Archived from the original on 2007-11-12. Retrieved 2010-12-05.
- ^ a b c "Cycas rumphii Miq". Flora of Australia Online. Australian Biological Resources Study. 1993. Archived from the original on 2012-10-25. Retrieved 2010-12-02.
- ^ "Cycas rumphii Miq". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2019-01-27.