Hoya magnifica
| Hoya magnifica | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Hoya magnifica | ||||||||||||
| PIFost. & Liddle |
Hoya magnifica is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya magnifica is a climbing plant with twisting shoots several meters long. The shoots measure up to 5 mm in cross section. Young shoots are densely hairy, older shoots are only sparsely hairy. The leaves are stalked, the upright, densely hairy petioles are 14 to 43 mm long with a diameter of 2.3 to 2.5 mm. The leaf blades are elliptical-ovate to narrowly ovate, up to 19 cm long and up to 10 cm wide. The top is sparsely hairy, the underside is densely hairy. The apex is long and finely pointed, the base is heart-shaped to round. The leaf veins do not emerge. The vegetative parts secrete a milky juice when injured.
The umbellate inflorescence is horizontal to pendulous. The umbels are up to 9 cm in diameter. The densely hairy inflorescence stalks are 9 to 10 mm long with a diameter of 5 to 6 mm. The densely hairy flower stalks are 2 to 5 cm long, and have a diameter of 1.1 to 2.6 mm. The corolla has a diameter of 4 to 4.5 cm and a height of 1 to 1.5 cm. The sepals are lanceolate-ovate, 13 to 16 mm long and 7 to 10 mm wide; they are densely hairy on the outside. The corolla is bell-shaped and creamy white to white. The petal lobes are spread out or slightly bent back. They are triangular, 15 to 18 mm long and 15 to 18 mm long at the base, and glabrous. The bald corolla tube is 10 to 14 mm high and 22 to 25 mm in diameter. The corolla is white to creamy white, 4 to 5 high and 10 to 16 mm wide. The lobes are towering 4.8 to 7.0 mm long, 4.0 to 4.5 mm high and 2.8 to 4.0 mm wide at the base. The outer extension is rounded and curved upwards, the inner extension is lanceolate. The stamen processes are lanceolate, 1.7 to 2 mm long and 1.3 to 1.7 mm long. The stylus head is recessed spherical and measures 4.5 to 5 mm in diameter. The pollinarium is 1.3 to 1.4 mm long and 1.2 to 1.3 mm wide. The pollinia are elongated, 1.12 to 1.15 mm long, 0.35 to 0.42 mm wide with a transparent outer edge. The corpusculum is egg-shaped, 0.8-0.9 mm long and 0.55-0.58 mm wide. The caudicles are 0.30 to 0.35 mm long and 0.13 to 0.14 mm wide and wingless. The bare spindle-shaped follicles are up to 19 cm long with a diameter of 1.2 cm.
Similar Art
The species resembles Hoya albiflora flower, but differs from this species in that it has much larger flowers with star-shaped tips of the petals.
Geographical distribution and habitat
The species has a very limited range in the Morobe Province and the Central Province of Papua New Guinea. There it grows as a creeper in rainforests at heights of 650 to 2000 m above sea level.
Taxonomy
The taxon was established in 1992 by Paul Irwin Foster and David J. Liddle . It is accepted as a valid taxon online by Plants of the World . The holotype (Streimann & Kairo NGF39381) was collected in 1969 by Streimann & Kairo. Herbarium from the holotype is kept in the Australian National Herbarium in Canberra. The species name was chosen by the authors because of the large white flowers.
literature
- Paul Irwin Forster, David J. Liddle: Taxonomic studies on the genus Hoya (Asclepiadaceae) in Papuasia, 1-5. Austrobaileya, 3 (4): 627-641, 1992 JSTOR
- Christiane Hoffmann, Ruurd van Donkelaar, Focke Albers: Hoya. In: Focke Albers, Ulli Meve (Hrsg.): Succulents Lexicon Volume 3 Asclepiadaceae (silk plants) . Pp. 147-160, Ulmer, Stuttgart 2002, ISBN 3-8001-3982-0 (pp. 155/56).