Orania ravaka (Orania ravaka)
Description
Large palm. Trunk about 10 - 20 m tall, grossly swollen at base, about 10 - 20 cm in diam. at breast hight, internodes 2.5 - 5 cm, greyish brown, obscurely ringed with scars, bark pale brown. Leaves 6 - 8 in the crown ? some old individuals with 9 - 13, distichously arranged, densely covered with red-brown tomentum, about 2.5 - 4.5 m long; leaf-sheath about 21.5 - 35 cm long, 8.5 - 11 cm wide, margins disintegrating into fibres, in some individuals rarely, adaxial surface with thin red-brown tomentum, wax present, abaxial surface with dense red-brown tomentum and creamy white indumentum, sometimes with greyish white indumentum; petiole about 30 - 94 cm long, about 1.7 - 2 cm in diam. in the middle, margins disintegrating into fibres; rachis about 198 - 321 cmlong, about 2 cm in diam. in the middle; leaflets elongated lanceolate,regularly arranged leaflets held in one plane, about 33 - 44 on each side of rachis, leaflets about 5.5 - 7 cm distant, in the proximal about 3 cm, about 50 - 74 cm long, 4 - 5 cm wide, adaxial surface glabrous with white substance scattered, thin red-brown tomentum on basal part and midrib, greyish white indumentums on midrib, midrib robust, other ribs thick, abaxial surface with dense white indumentum and thin redbrown tomentum, midrib robust, other ribs thick; ramenta present, mainly on midrib, sparsely on other ribs, red-brown or dark brown, conspicuous, about 1 cm long.greyish white indumentums on midrib, midrib robust, other ribs thick, abaxial surface with dense white indumentum and thin redbrown tomentum, midrib robust, other ribs thick; ramenta present, mainly on midrib, sparsely on other ribs, red-brown or dark brown, conspicuous, about 1 cm long.greyish white indumentums on midrib, midrib robust, other ribs thick, abaxial surface with dense white indumentum and thin redbrown tomentum, midrib robust, other ribs thick; ramenta present, mainly on midrib, sparsely on other ribs, red-brown or dark brown, conspicuous, about 1 cm long.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Liliopsida
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Order: Arecales
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Family: Arecaceae
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Genus: Orania
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