Hoya macrophylla

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Hoya macrophylla
Original illustration by Blume (from Rumphia, Vol. 4, Plate 185 [1])

Original picture of Blume (from Rumphia, vol. 4, plate 185)

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

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

features

Hoya macrophylla is an epiphytic , climbing and twisting plant with round shoots in cross section. The leaves are stalked, the thick, bare petioles are up to 2.5 cm long. The fleshy to leathery leaf blades are ovate or ovate-oblong, and 14 to 25 cm long and 4.5 to 11 cm wide. The apex is pointed to long, the base is pointed, more rarely also almost round-blunt. They are dark green on top and a little reddish on the underside. The lighter leaf veins are clearly visible. It consists of the midrib and a pair of leaf veins, which run parallel to the edge approximately in the middle between the midrib and the leaf margin. The midrib and lateral ribs as well as the leaf margins are connected by transverse leaf veins.

The stalked, more or less spherical inflorescence contains about 24 to 30 flowers. Up to five inflorescences can arise from one growth node. The inflorescence stalk is 6 to 10 cm long, more or less purple in color and glabrous. The purple-colored flower stalks are 1 to 3 cm long and sparsely hairy or glabrous. The sepals are triangular and about 0.6 cm long. They are red and very sparsely hairy on the outside. The corolla is light pink to purple. The fleshy petal lobes are ovate, tapering to a point and curved back. They are bare on the outside and densely covered with whitish papillae on the inside. The secondary crown is whitish to pink, correspondingly darker in the middle (to dark pink). It has a diameter of 3.5 mm. The staminal tips of the secondary crown are keeled on the upper side. The outer extension is pointed and ascending, the inner extension is pointed. The pollinia are linear-lanceolate.

Geographical distribution and habitat

The distribution area extends from Borneo to Java and the Lesser Sunda Islands . According to Yves Laumonier, Hoya macrophylla is also said to occur on Sumatra. The species grows there in tropical forests.

Taxonomy

The taxon was set up in 1827 by Carl Ludwig Blume . More recent synonyms are Hoya clandestina Blume (1848) and Hoya browniana Koord. (1911).

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 (p. 155).
  • Robert Dale Kloppenburg, 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. 158/59)
  • Surisa Somadee, Jens Kühne: Hoya 200 different wax flowers. 96 p., Formosa-Verlag, Witten 2011 ISBN 978-3-934733-08-4 (p. 61)

Individual evidence

  1. ^ Carl Ludwig von Blume: Rumphia, sive Commentationes Botanicae imprimis de plantis Indiae Orientalis, tum penitus incognitis tum quae in libris Rheedi, Rumphii, Roxburghii, Wallichii, aliorum recensentur. Tomus Quartus. Amsterdam, 1858 p. 32 , plate 185 (online at Biodiversity Heritage Library)
  2. ↑ a b Kew Sciences - Plant of the World online: Hoya macrophylla flower
  3. ^ Yves Laumonier: The Vegetation and Physiography of Sumatra. Klüwer Academic Publishers, 1997 (Geobotany, Vol. 22) ISBN 978-94-010-6502-3
  4. ^ Carl Georg Blume: Bijdragen tot de Flora van Nederlandsch Indië, 16th piece, p. 1063, Ter Lands Drukkerij, Batavia / Djakarta, 1827 Online at Biodiversity Heritage Library .