Hoya halophila
| Hoya halophila | ||||||||||||
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Original illustration by Schlechter 1913: Fig. 2. A habit, B blossom, C corolla segment from the inside, D gynostegium with corona, E, F corona scales, G pollinarium. |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Hoya halophila | ||||||||||||
| Schltr. |
Hoya halophila is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya halophila is an epiphytic, twining subshrub with thread-like shoots. The bare shoots are densely leafed and round in cross section. The leaves are short stalked (3 to 4 mm) and are spread out. The fleshy leaf blades are broadly ovate to roundish ovate, and 3.5 to 5 cm long and below the middle 2.3 to 3.4 cm wide. The apex is pointed, the base is rounded. The top and bottom are bare. The top is glossy, the bottom rather matte. Adhesive roots are located below the nodes.
The umbel-shaped inflorescence contains up to 25 flowers and has a long stalk (5 to 6 cm long). The inflorescences arise from the leaf axils. The flower stalks, up to 4.3 cm long, are thin and bare. The bald sepals are ovate and obtuse; are about 4.5 mm long. The edges are sparsely covered with cilia. The corolla has a diameter of 9 mm when spread out. The egg-shaped, pointed corolla lobes are strongly bent back (about the two outer thirds of the length). They are bare on the outside, covered with tiny triangular scales on the inside, with the exception of the tips, which are bare. The tips of the secondary crown are curved on the outside, lanceolate-elliptical. They are pointed at the front, blunt behind and drawn out in the shape of an ear below. Together with the gynostegium, they form a wide, 3 mm long cone.
The elongated, slender Pollinia are slightly crescent-shaped curved outwards. The caudiculae are short and thick and attach at a 45 ° angle to the corsus pusculum. The corpusculum is very small and diamond-shaped.
Similar species
Hoya halophila differs from Hoya inconspicua Hemsl by its very broad leaves . In Hoya inconspicua the gynostegium is higher and the corners of the secondary crown are narrower. The flowers are lighter red.
Geographical distribution and habitat
The distribution area extends from Papua New Guinea to the Solomon Islands . The species occurs in Papua New Guinea in trees not far from the sea coast (name: halophila = salt-loving) of Eitape, about 10 m above sea level. Rudolf Schlechter found it blooming in August 1909.
Taxonomy
The taxon was drawn up in 1913 by Rudolf Schlechter. The holotype is kept in the herbarium of the Botanical Garden in Berlin (Schlechter 19968).
literature
- Dale Kloppenburg, Ann Wayman: The World of Hoyas - a book of pictures. A revised version. Orca Publishing Company, Central Point, Oregon 2007, ISBN 0-9630489-4-5 , p. 232 brief description and p. 223 photo by Dale Kloppenburg
- Surisa Somadee and Jens Kühne: Hoya 200 different wax flowers. 96 p., Formosa-Verlag, Witten 2011 ISBN 978-3-934733-08-4
- Anders Wennström and Katarina Stenman: The Genus Hoya - Species and Cultivation. 144 p., Botanova, Umeå 2008 ISBN 978-91-633-0477-4
Individual evidence
- ↑ Kew Science - Plants of the World online: Hoya halophila Schltr.
- ^ Rudolf Schlechter: The Asclepiadaceen of German New Guinea. Botanical Yearbooks for Systematics, Plant History and Plant Geography, 50: 81-164, 1913. Online at Biodiversity Heritage Library