Hoya diptera
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Hoya diptera , inflorescence and leaf |
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Hoya diptera is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
description
Vegetative characteristics
Hoya diptera is a perennial herbaceous plant and grows climbing and epiphytic . The bald or only very slightly hairy shoot axes are only about 3 mm thick.
The leaves are divided into a petiole and a leaf blade. The wrinkled petiole is 5 to 15 mm long. The slightly fleshy, succulent leaf blade is 3.5 to 8 centimeters long and 1 to 3.2 centimeters wide and is oval-elliptical to narrow-lanceolate with a bluntly rounded blade base and a long tip. The leaf surface is very shiny, older leaves occasionally have single silver speckles.
Generative characteristics
The umbel-shaped inflorescence , hanging on a 1 to 4.5 centimeter long, bare or very slightly downy hairy inflorescence stem, contains five to ten flowers. The flower stalks are 0.8 to 2 inches long, thin, glabrous or slightly downy hairy.
The hermaphrodite flowers are radially symmetrical and five-fold. The membranous sepals are triangular at a size of about 1 mm and the edges are ciliate. The wheel-shaped corolla has a diameter of 1.1 to 1.6 centimeters. It is yellowish to yellowish green, seldom reddish in color at the base. The petals are fused at the base and have thick velvety hairs inside. The petal lobes are triangular to ovate, 4 to 6 mm long and 4 to 6 mm wide. Their edge is usually bent back, the rounded tips are also slightly bent outwards. The tips of the staminal corolla are elongated, 3 to 4.2 mm long and 1.6 to 1.8 mm wide. The top is flat, the bottom is rounded. The outer process is blunt, the inner, ascending process is long, pointed and dark pink in color. The pollinia are 0.5 to 0.6 mm long. The flowers have a weak or no smell and little nectar .
Chromosome number
The number of chromosomes is 2n = 22.
Geographical distribution and habitat
Hoya diptera occurs only on the Fiji islands of Viti Levu and Taviuni . There it grows epiphytically on trees.
Taxonomy
The first description of Hoya diptera was made in 1861 by Berthold Seemann in the Flora vitiensis . Hoffmann et al. indicate the 9th volume of Bonplandia (p. 257) as the first publication ; however, only the name appears without a description and without an illustration.
Folk medicine
The leaves and bark have been used to treat amoebic dysentery in Fiji .
supporting documents
literature
- 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 ( Hoya diptera : p. 151).
- Anders Wennström, Katarina Stenman: The Genus Hoya - Species and Cultivation. 144 p., Botanova, Umeå 2008 ISBN 978-91-633-0477-4 (p. 53)
Individual evidence
- ↑ Hoya diptera at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Berthold Seemann: Flora vitiensis: a description of the plants of the Viti or Fiji islands, with an account of their history, uses, and properties. Volume 1, 366 pp., London 1861 scanned at www.biodiversitylibrary.org .
- ↑ Berthold Seemann: Plantae vitiensis. Bonplandia, magazine for the entire botany , Volume 9, pp. 253-262, Hanover 1861 scanned at www.biodiversitylibrary.org . (P. 257)
- ↑ Aaron Matas: 1000 plants and remedies. Preview on Google Books
Web links
- Website about the genus Hoya by Simone Merdon-Bennack. ( Memento from February 15, 2008 in the Internet Archive )
- Hoya diptera on www.myhoyas.com .