Orania ferruginea A. P. Keim & J. Dransf., Kew Bulletin 67: 160 (2012)

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
New Guineapresent (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A
New Guinea. Within the mainland of New Guinea this species has a disjunct distribution, found in an area called Tuwanwowi near the town of Manokwari in Papua Barat and a hill called Bisidak near the town of Elelim in the Kurima Distr. In Wamena vicinity, Papua. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Habitat

  • Lowland undisturbed tropical rainforest with altitudes about 200 up to 600 m. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Discussion

  • Orania ferruginea is easily recognised by its dense and thick red-brown tomentum covering on the leaf and infructescences. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Conservation

  • Critically endangered (CR B1, B2, C). The palm occurs in two localities. The type locality near Manokwari is within a protected area but the population size is very restricted. We know little of the second locality near Wamena. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Etymology

  • Rusty red-brown coloured. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Description

  • Small palm. Trunk c. 10 m tall, c. 5 - 6 cmdiam. (dbh); internodes green, smooth, c. 10 cm. Leaves 10 in a crown, regularly arranged, c. 2.3 - 4 m long; leaf-sheath c. 40 cm long, c. 9 cm wide near base, margins disintegrating into fibres, fibres straight, c. 10 - 12 cm long, adaxial surface glabrous, abaxial surface with dense creamy white indumentum and red-brown tomentum; petiole c. 80 cm long, c. 2 cm diam., densely covered with red-brown tomentum and creamy white indumentum; rachis c. 1.1 - 2.8 m long, c. 2 cm diam. in the middle part, densely covered with redbrown tomentum and creamy white indumentum; leaflets elongate-lanceolate, regularly arranged leaflets held one plane, leaflets c. 6 - 7 cm distant, c. 87 - 100 cm long, 5 cm wide, adaxial surface glabrous, redbrown tomentum on midrib, midrib thick, other ribs slender, abaxial surface with dense white indumentum, red-brown tomentum on midrib and margin, midrib thick, other ribs slender. Inflorescence spreading, branching to 2 orders, c. 1 - 1.2 m long, slender; prophyll persistent, c. 17 - 25 cm long, 4 - 4.5 cm wide near base, margins disintegrating into fibres, fibres straight, c. 10 - 12 cm long; peduncle c. 50 - 56 cm long, deeply covered with red-brown tomentum; peduncular bract one, woody, c. 1.14 - 1.4 m long, 6 - 7.5 cm wide in near base, persistent, splitting in the middle, disintegrating into fibres when old, adaxial surface glabrous, abaxial surface with dense red-brown tomentum; rachis c. 50 - 64 cm long; first order branches c. 24 - 25 cm long, rachillae bract small; rachillae slender, c. 18.5 - 20 cm long, bearing 100 - 150 flower clusters, arranged in triads in the proximal 1=3, the basal c. 1 - 2 cm devoid of flowers, triads c. 1 cm distant. Flowers unknown. Fruits globose or bilobed, c. 3.5 - 4 cmdiam., dull green when young, yellow when mature. Embryo placed below middle line of seed. Eophyll bifid. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Materials Examined

  • INDONESIA. Papua Barat. Manokwari: Tuwanwowi, protected forest of BLKN, 22 March 1999, A. P. Keim AK 41 (BO!, K!, MAN!); A. P. Keim AK 42 (BO!, K! holotype, MAN!). Papua. Wamena: Kurima subdistr., Elelim, Bukit Bisidak, 11 Oct. 1993, D. Gandawidjaja 2369 (BO!). (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Bibliography

    A. A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012