Hoya lacunosa

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Hoya lacunosa
Hoya lacunosa, inflorescence

Hoya lacunosa , inflorescence

Systematics
Order : Enzianartige (Gentianales)
Family : Dog poison family (Apocynaceae)
Subfamily : Silk plants (Asclepiadoideae)
Tribe : Marsdenieae
Genre : Wax flowers ( hoya )
Type : Hoya lacunosa
Scientific name
Hoya lacunosa
flower

Hoya lacunosa is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).

features

Hoya lacunosa is a climbing plant with thin, bare shoots. The nodes form roots for anchoring. The leaves have 4 mm long, thick, almost bare stems. The leaf blades are ovate to lanceolate and fleshy and shiny. The base is round or narrowly rounded, the outer end pointed long. They measure 3 to 7 inches in length and 2.5 to 3 inches in width. The nerve of the leaf blade protrudes somewhat.

The pendulous inflorescence is 1- to 30-flowered (16 to 20-flowered) and convexly arched. The stalk of the inflorescence is stiff and up to 5 cm long. The flowers are button-shaped with a diameter of about 8 mm. The stiff, curved flower stalks are 0.4 to 2.5 cm long. The sepals are very small and blunt. The corolla is whitish, thickly covered with long, downy hairs on the inside. The corolla lobes are triangular and strongly bent back. The secondary crown is yellowish white with a dark yellow center. The staminal corolla lobes are elliptical in shape, with a blunt, somewhat ascending outer process and a pointed, ascending inner process. The stylus head is conical. The extensions of the stamens are very thin and membrane-like. The elongated sickle-shaped pollinia have thick, cup-shaped and broadly winged caudiculae. The flowers are very fragrant and stay open for about 5 days. They produce little or no nectar. The long, spindle-like follicles are 5 to 6 cm long and 0.5 cm thick.

The number of chromosomes is 2n = 22.

Geographical distribution and habitat

The species has a very large distribution area, ranging from India, China, Thailand, Malaysia, Singapore to Indonesia (Borneo, Java, Sumatra).

Taxonomy

The species was described for the first time in 1826 by Carl Ludwig Blume in his "Bijdragen tot de Flora van Nederlandsch Indie" on p. 1063, but not shown. It was not until 1848 that Blume also gave an illustration in his work "Rumphia ..." and in 1849 in the work "Museum Botanicum Lugduno-Batavum". Synonyms are Hoya suaveolens Miquel and Hoya lacunosa var. Pallidiflora Hook. f. and probably also Hoya nabawanensis Kloppenburg & Wiberg 2002.

supporting documents

literature

  • Focke Albers, Ulli Meve (Hrsg.): Succulent lexicon Volume 3 Asclepiadaceae (silk plants) . Ulmer, Stuttgart 2002, ISBN 3-8001-3982-0 (p. 154).
  • Dale Kloppenburg and Ann Wayman: The World of Hoyas - a pictorial guide. A revised version. 248 pp., Orca Publishing Company, Central Point, Oregon, 2007 ISBN 0-9630489-4-5 (pp. 136/7)
  • Anders Wennström and Katarina Stenman: The Genus Hoya - Species and Cultivation. 144 p., Botanova, Umeå 2008 ISBN 978-91-633-0477-4 (p. 79)
  • Surisa Somadee and Jens Kühne: Hoya 200 different wax flowers. 96 p., Formosa-Verlag, Witten 2011 ISBN 978-3-934733-08-4 (p. 58)

Individual evidence

  1. ↑ Somadee & Kühne (2011: p. 58)
  2. ↑ Hoya lacunosa at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  3. ↑ Online at biodiversitylibrary.org
  4. ↑ Blume, Karl Ludwig: Rumphia, sive, Commentationes botanicæ imprimis de plantis Indiæ Orientalis: tum penitus incognitis tum quæ in libris Rheedii, Rumphii, Roxburghii, Wallichii aliorum recensentur / scripsit CL Blume cognomine Rumphius. Tomus quartus. Lugduni Batavorum (Leiden, Netherlands) 1848 Online at biodiversitylibrary.org - illustration (plate 184) or description (p. 30, as Otostemma lacunosa )
  5. ↑ Carl Ludwig Blume: Museum botanicum Lugduno-Batavum, sive, Stirpium exoticarum novarum vel minus cognitarum ex vivis aut siccis brevis expositio et descriptio. T.1, Lugduni-Batavorum (Leiden, Netherlands), EJ Brill, 1849- (56) Online at biodiversitylibrary.org Description (p. 59) and Figure XI
  6. ↑ www.simones-hoyas.de - Simone Merdon-Bennack's website ( Memento from April 11, 2005 in the Internet Archive )

Web links

Commons : Hoya lacunosa  - Collection of images, videos and audio files