Cycas bougainvilleana
Calcareous coral sand dunes and adjacent forests, typically on or near the coast.·Arborescent·Not considered threatened
Cycas bougainvilleana is a species of cycad native to the islands northeast of Papua New Guinea, including New Britain, the Bismarck Archipelago, and the Solomon Islands. It typically grows on or near the coast in calcareous coral sand dunes and adjacent forests. Botanically, it is characterized by erect stems up to 5 meters tall, crowned with numerous long, pinnate leaves, and distinct reproductive cones.
Key Facts
- ›Native to New Britain, the Bismarck Archipelago, and the Solomon Islands.
- ›Found in coastal calcareous coral sand dunes and adjacent forests.
- ›Stems can reach up to 5 meters in height.
- ›Leaves are pinnate, measuring 2.4-2.7 meters in length.
- ›Leaflets are numerous, densely tomentose when young, becoming glabrous and glossy green.
- ›Its name honors Bougainville Island in the Bismarck Archipelago.
New Britain, Bismarck Archipelago, Solomon Islands
Erect, Up To 5 m Tall
- 2.4-2.7 m long
- Pinnate
- 130-260 leaflets
- Densely white to orange tomentose when young
- Eventually glabrous
- Glossy bright green
- Leaflets 25–34 cm long and 13–18 mm wide
- Leaflets angled forward at 60-80° degrees
- Petiole sometimes armed with spines
- Petiole terminates in a spine or pair of leaflets
- Female cones are open, with sporophylls 7 cm long and 3.5–5 cm wide
- Female sporophylls are dense grey to orange tomentose
- Female sporophylls have 6-9 ovules
- Female sarcotesta is thick orange tomentose
- Female sclerotesta is flattened ovoid shaped
- Male cones are erect, narrow ovoid
- Male cones have a broad apical spine
Sarcotesta Is Thick Orange Tomentose, Sclerotesta Is Flattened Ovoid Shaped
About Cycas bougainvilleana
Cycas bougainvilleana is a species of cycad belonging to the genus Cycas, distinguished by its impressive size and coastal habitat. This species is native to the islands located northeast of Papua New Guinea, specifically found on New Britain, within the Bismarck Archipelago, and extending to the Solomon Islands.
Habitat and Growth
This cycad thrives in environments characterized by calcareous coral sand dunes and the adjacent forest areas, typically occurring on or very near the coast. The stems of Cycas bougainvilleana are erect and can reach considerable heights, up to 5 meters. These stems are topped with a crown of numerous leaves, creating a striking botanical form.
Botanical Features
The leaves are a prominent feature, measuring between 2.4 and 2.7 meters in length. They are pinnate, composed of a large number of leaflets, ranging from 130 to 260. Initially, these leaflets are covered in a dense tomentose layer of white to orange fuzz, which eventually gives way to a glabrous, glossy, and bright green surface. Each leaflet is typically 25–34 cm long and 13–18 mm wide, angled forward at 60-80 degrees. The petiole, or leaf stalk, may sometimes bear spines and terminates in either a spine or a pair of leaflets.
The reproductive structures of Cycas bougainvilleana are also distinctive. Female cones are open, with sporophylls that are 7 cm long and 3.5–5 cm wide, covered in dense grey to orange tomentose hairs, and each bearing 6-9 ovules. The sarcotesta, the fleshy outer layer of the seed, is thick and orange tomentose, while the sclerotesta, the hard inner layer, is flattened and ovoid in shape. Male cones are erect and narrow ovoid, featuring a broad apical spine.
Naming and Conservation
Cycas bougainvilleana derives its name from its geographical origin on Bougainville Island, part of the Bismarck Archipelago. Current assessments indicate that the species is not considered threatened, suggesting a stable population within its native range. It is noted to be closely related to Cycas seemannii, a species found in Fiji.
Source: Wikipedia ↗
Frequently Asked Questions
Where is Cycas bougainvilleana found naturally?
Cycas bougainvilleana is naturally found on the islands northeast of Papua New Guinea, specifically on New Britain, the Bismarck Archipelago, and the Solomon Islands. It thrives in coastal environments.
What kind of habitat does Cycas bougainvilleana prefer?
This cycad species prefers to grow on or near the coast, particularly in calcareous coral sand dunes and the adjacent forest areas. These environments provide the specific conditions it needs to flourish.
How tall can Cycas bougainvilleana grow?
The stems of Cycas bougainvilleana are erect and can grow up to 5 meters tall. This height contributes to its prominent presence in its native habitat.
What are the characteristics of its leaves?
The leaves of Cycas bougainvilleana are pinnate and can be quite long, ranging from 2.4 to 2.7 meters. They are adorned with 130-260 leaflets that are initially covered in dense white to orange fuzz, eventually becoming smooth, glossy, and bright green.
What is the origin of the name Cycas bougainvilleana?
The species is named after its home on Bougainville Island, which is part of the Bismarck Archipelago. This geographical reference highlights its primary natural distribution.
Related Cycad species
Cycas armstrongii
Cycas armstrongii is a species of cycad native to the Northern Territory of Australia, found across the Top End region. It is characterized by its relatively tall stems and unique deciduous leaves that shed during the dry season, earning it the nickname "fire fern." This species is notably abundant and highly tolerant of the annual grass fires common in its habitat.
Cycas arnhemica
Cycas arnhemica is a species of cycad native to Arnhem Land in Australia's Northern Territory. It is characterized by erect stems reaching up to 2.5 meters and pinnate leaves with numerous leaflets. This species is commonly found in eucalyptus woodlands and savanna grasslands, with a restricted distribution around specific river systems.
Cycas cairnsiana
Cycas cairnsiana is a species of cycad found in northern Queensland, Australia, specifically on the Newcastle Range. It is characterized by its distinctive blue-green leaves, spiny petioles, and a stem that can reach up to 5 meters in height with a swollen base. This species thrives in dry, rocky woodlands and is noted for its resilience to seasonal extremes.