Hoya archboldiana

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

Hoya archboldiana is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae). The species has large, bell-shaped, pink or white-pink flowers, which are among the largest flowers in the wax flower genus. The species name honors the American aviator, explorer and philanthropist Richard Archbold .

features

Hoya archboldiana is a climbing plant and has bare shoots that are several meters long and cork with a diameter of up to 4 mm. The leaves are stalked; the handle, measuring about 4 mm in cross-section, is 1.4 to 2 cm long and concave on the underside. The fleshy, glabrous leaf blade is lanceolate-ovate to lanceolate-elliptical. The end of the leaf tapers, the base is heart-shaped. The leaf blades are up to 16 cm long and 7 cm wide. The top is glossy dark green, the underside pale green.

The umbel-shaped inflorescence hangs and contains up to ten individual flowers (8 to 12 flowers). The bald inflorescence stalk is 2.5 to 3 mm long with a diameter of 3 mm. The bell-shaped flower reaches a diameter of up to 4.7 cm and a height of 1.8 to 2 cm. The bare stems of the flowers vary in length from 4.5 to 5.5 mm and in thickness from 1.8 to 2 mm. The sepals are lanceolate-ovate, 3 to 4.5 mm long and 4 to 4.1 mm wide at the base. The hairless corolla is colored pink to white-pink. The triangular petal lobes are 13 to 14 mm long and 18 to 19 mm wide at the base. The tips are bent back, the edges slightly curled. The pink secondary crown has a diameter of 10 to 11 mm and a height of 17 to 18 mm. The staminal corolla lobes are more or less close to the crown. They are elongated-lanceolate in shape and 2.5 to 2.7 mm long and 3.5 to 3.6 mm wide. The outer extension is more or less blunt, the inner extension is pointed and ascending. The extensions of the stamens are lanceolate, 2 mm long and 1.5 mm wide. The stylus head is sunk in the center and measures 2.5 to 3 mm in diameter. The pollinia are elongated, 1.6 mm long and 0.4 mm wide. The egg-shaped corpusculum measures 0.75 mm by 0.4 mm. The dimensions of the winged caudiculae are 0.4 × 0.2 mm. The flowers stay open for almost 14 days. According to Simone Merdon-Bennack, in the evenings they give off an “extremely intense, almost intrusive scent of musk”. Anders Wennström and Katarina Stenman, on the other hand, write that the flowers have a weak or no scent at all.

Similar species

Hoya archboldiana is closely related to Hoya macgillivrayi , and Hoya megalaster Warburg and Hoya onychoides P.I.Forst., DJLiddle & IMLiddle are also quite similar. All four species have very large, red, bell-shaped flowers and narrow, lanceolate corolla lobes.

Geographical distribution and habitat

The species occurs in the lowland rainforests of Papua New Guinea and rises to about 600 m above sea level. It grows there in the canopy of the trees.

Taxonomy

Hoya archboldiana was first described by Cecil Norman in 1938 . The type specimen was collected on November 3, 1933 by LJ Brass near Rona on the Laloki River in the Central Province of Papua New Guinea 450 m above sea level. There are no synonyms.

supporting documents

literature

  • Focke Albers, Ulli Meve (Hrsg.): Succulent lexicon Volume 3 Asclepiadaceae (silk plants). Ulmer, Stuttgart 2002, ISBN 3-8001-3982-0 , pp. 148-149.
  • Dale Kloppenburg, Ann Wayman: The World of Hoyas - a pictorial guide. Hill-n-Dale Publishing, Fresno, California 1999, ISBN 0-9630489-4-5 , pp. 50-51.
  • Anders Wennström, Katarina Stenman: The Genus Hoya - Species and Cultivation. Botanova, Umeå 2008, ISBN 978-91-633-0477-4 , p. 26.

Individual evidence

  1. ↑ Surisa Somadee and Jens Kühne: Hoya 200 different wax flowers. 96 p., Formosa-Verlag, Witten 2011 ISBN 978-3-934733-08-4 (p. 28)
  2. ↑ Simone Merdon-Bennack's website ( Memento from February 10, 2005 in the Internet Archive )
  3. ↑ Cecil Norman: Botanical results of the Archbold Expedition no.10 New Papuan Asclepiadaceae. In: Brittonia. 2, 4 (Jun 1937), p. 328, Bronx, NY Online at JSTOR

Web links