Orania longistaminodia A. P. Keim & J. Dransf., Kew Bulletin 67: 185 (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
So far this species has been collected only from the eastern part of New Guinea (i.e. Papua New Guinea) with a quite disjunct distribution. One specimen was collected from the northern part of the country, whereas the other one was from the southern part. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Habitat

  • Disturbed lowland tropical rainforest in coastal area at low elevation. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Conservation

  • Data deficient (DD). The palm is known from only two specimens from widely separated localities. We have no information on the status of forests at these localities. (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Etymology

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

Uses

  • Sap is said to be used by local tribes as a medicine for sore throats (Barfod et al. 374, field notes). (A.P. Keim & J. Dransfield, A monograph of the genus Orania (Arecaceae: Oranieae) in Kew Bulletin 67. 2012)A

Description

  • Large palm. Trunk c. 6 m tall, c. 22 cm diam. (dbh), internodes 5 - 10 cm, nodes c. 3 - 5 cm wide. Leaves 12 in the crown, spirally arranged; leaf-sheath and petiole 2.6 - 2.8 m long, adaxial surface glabrous, abaxial surface with thin red-brown tomentum, margins disintegrating into fibres; petiole c. 4 - 5 cm diam., margins disintegrating into fibres, with thin red-brown tomentum; rachis c. 3.63 m long, covered with thin red-indumentum; leaflets elongate-lanceolate, regularly arranged leaflets held in one plane, the proximal part of rachis with 1 single leaflet, c. 8.5 cm distant in the middle part of rachis, c. 130 × 10 cm, adaxial surface glabrous, with thin red-brown tomentum on the midrib, midrib thick, other ribs slender, glabrous, abaxial surface densely covered with white indumentum, red-brown tomentum on the margin and basal part of the leaflet, midrib robust, other ribs slender. Inflorescence spreading, branching to 2 orders, c. 53 - 94 cm long; prophyll persistent, heavily disintegrating into fibres, c. 33.5 - 34 cm long, 9 cm wide, distally splitting in the middle; peduncle c. 33 - 58 cm long, with red-brown tomentum; peduncular bract one, woody, adaxial surface glabrous, abaxial surface with red-brown tomentum, c. 80 - 90 cm long, persistent, splitting in the middle, disintegrating into fibres; rachis c. 20 - 36 cm long; first order branch c. 25 cm long, rachillae bract c. 9 × 20 mm; rachillae thick, c. 18 - 20 cm long, bearing 36 - 42 flower clusters, triads arranged in the proximal 1=3 & staminate flowers in the distal 2=3 of rachilla, the basal c. 1.5 - 2.5 cm devoid of flowers, triads c. 1.5 cm distant, maximum number of pistillate flowers in rachilla 8. Staminate flowers with calyx of 3 united minute sepals; corolla with 3 free petals, c. 5 × 2 mm; stamens 5 - 7, filaments free, dark-brown, 0.7 - 1 mm long, anthers elongatelanceolate, pale creamy yellow, free, c. 2 - 3 mm long, pistillode uncommon, c. 2 - 2.5 mm long, 3 - 3.5 mm wide. Pistillate flowers with calyx of 3 united sepals, c. 2 mm long; corolla with 3 free petals, c. 8 × 6 mm; staminodes 6, unequal, 3 small, c. 1 mm long, 1 large, c. 2 - 2.5 mm long, 2 conspicuously large, c. 5 × 2 mm, in some flowers with 3 conspicuously large, c. 5 × 2 mm and 3 small staminodes, c. 1 mm long; gynoecium dark-brown, c. 4 mm long, 4 - 5 mm wide; stigma with 3 elongate lobes, c. 1 - 1.5 mm long. Fruits globose or bilobed, c. 7 cm diam., otherwise c. 4.8 - 5 cm diam. (Barfod 473), bright orange when mature, stigmatic remains sub-basal (Barfod et al. 374). 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

  • PAPUA NEW GUINEA. East Sepik: Near Antenna, 143°37?S 3°37?E, 16 Nov. 1996, Barfod et al. 374 (K! holotype, AAU, LAE). Gulf: Logging camp on the Vailala R., 145°29'S 07°45'E, 8 - 9March 2000, Barfod et al. 473 (AAU, BRI, CANB, K!, LAE). (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