Hoya gracilipes
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Hoya gracilipes is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya gracilipes is an epiphytic plant that climbs high in trees with filiform, branched shoots. The sparsely leafed shoots are flexible, round and bare in cross-section. In some places, they attach themselves to the substrate with adhesive roots. The spreading leaves are short-stalked, the petioles are 0.4 to 0.7 cm long. The leathery leaf blades are lanceolate or elliptical-lanceolate, 7.5 to 10 cm long and approximately below the middle (closer to the stem) 2 to 3 cm wide. They are bare on the top and bottom. The base is rounded, the apex is long and pointed. The palm-shaped leaf veins are not particularly prominent. It consists of the not very prominent midrib and five to 6 secondary ribs on either side of the midrib. The ends of the secondary ribs can be connected to one another by tertiary ribs.
The inflorescence contains 8 to 12 flowers. The very slender, bare flower stalks are round in cross section and measure 2 cm in length. The elongated sepals are about 1.5 mm long. The ends are blunt, the edges are covered with fine cilia . Otherwise the sepals are bare on the outside. The wheel-shaped corolla has a diameter of 1.2 cm. The petals are fused in the basal half. They are bald on the outside and thickly covered with short downy hairs on the inside. The egg-shaped petals are 0.5 cm long, the edges are bent. The apices are rounded. The ovate corolla lobes are fleshy and spread out horizontally. The outer extension is short and pointed, the inner extension is broad with a rounded tip. The tips are keeled lengthways at the top in the middle. They have a longitudinal groove on the underside. The anthers are broadly trapezoidal, the egg-shaped, hyaline appendages are pulled out short lobed. The pollinia are elongated with a hyaline outer edge. The caudiculae are very short, the corpusculum rhombic and small. The stylus head is conical.
Similar Art
Hoya gracilipes is similar to Hoya chloroleuca Schlechter. The petal lobes are stronger, turned over almost the entire length, the apices are blunt. The corolla lobes are longer and relatively lower when viewed from the side. In the pollinarium the caudiculae are significantly shorter.
Geographical distribution and habitat
So far the species has only been found in the Torricelli Mountains in Papua New Guinea . It grew there on trees at 1100 m above sea level. Rudolf Schlechter found them blooming there in April 1902
Taxonomy
The taxon was described by Rudolf Schlechter in 1905 . The holotype was kept under the number Schlechter # 14478 in the herbarium of the Botanical Garden Berlin . The current whereabouts are unknown. The Plants of the World online database accepts the taxon as a valid species.
literature
- Robert Dale Kloppenburg: Dr. Schlechter's Hoya species. Fresno, California, 1993 Online at Biodiversity Heritage Library , pp. 70/71.
- Rudolf Schlechter: Asclepiadaceae. In: Karl Schumann, Karl Lauterbach (ed.): Supplements to the flora of the German protected areas in the South Seas: excluding Samoa and the Carolines. Pp. 353–369, Verlag der Gebrüder Borntraeger, Leipzig, 1905 Online at Biodiversity Heritage Library , p. 363