Cycas calcicola

Cycas calcicola is a species of cycad in the genus Cycas, native to northern Australia in the northwest of Northern Territory.

Cycas calcicola

Least Concern  (IUCN 3.1)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Family: Cycadaceae
Genus: Cycas
Species:
C. calcicola
Binomial name
Cycas calcicola
Maconochie

The stems are erect, 2–5 m tall and 16–22 cm diameter. The leaves are variably deep green and glabrous to white tomentose above, and persistently white tomentose below, 60–130 cm long, pinnate, with 210-410 leaflets. The leaflets are 5–12 cm long and 2–4 mm wide, and lie flat either side of the leaf stem (not in a 'v'-shape like most other Cycas species). The petioles are 18–30 cm long, and armed with sharp spines at the base.

The female cones are open, with sporophylls 12–18 cm long, with four to six ovules per sporophyll. The lamina is lanceolate, with spined dentate margins and an apical spine. The sarcotesta is orange-brown, the sclerotesta short ovoid to globular, with a network of shallow grooves. The male cones are solitary, narrow ovoid, 25–30 cm long and 5–7 cm diameter, brown, the sporophylls 25–30 mm long with an upturned apical spine.

Habitat

This cycad grows in a hot, dry, climate, often in association with Eucalyptus and Livistona. It was first found on limestone soil, from which the name calcicola "lime-dwelling" derives, but is not confined to limestone, also occurring on soils derived from sandstone and schist.

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References
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