Hoya coriacea
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Hoya coriacea , inflorescence |
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Hoya coriacea is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya coriacea is a perennial , epiphytic or terrestrial, climbing plant. The shoots have a diameter of 2 mm, older shoots are slightly woody. Adhesive roots are formed at intervals with which the plant anchors itself to the ground. The leaves are stalked, the mostly curved, thick petioles are up to 1 to 3 cm long and glabrous. The thin, leathery leaf blades are ovate to ovate-oblong or elliptical, and 7 to 15 cm long and 3 to 7 cm wide. They are light green with a shiny, bare upper side, the underside is slightly lighter. The apex is pointed, the base is blunt to rounded. The apex is usually curved downwards. The pinnate leaf veins are clearly visible. The lighter central rib is slightly rutted on the top.
The ball-shaped, hanging inflorescence has a diameter of 8 to 10 cm and contains up to 20 to 40 flowers (35 to 75 individual flowers). The slender inflorescence stalks are 5 to 10 cm long, round in cross section, and somewhat downy hairy or glabrous. The flower stalks are 2.7 to 3.6 cm long and slightly downy hairy. The sepals are hairy on the outside and glabrous on the inside. They measure 4.5 mm in length. The light yellow to cream-colored flowers are 1.5 to 2.5 cm in diameter. The egg-shaped corolla lobes are bent back and densely hairy inside, only the apices of the lobes are bare. On the outside they are covered with fine papillae. They are pointed and at the apex. The whitish secondary crown is spread out in a star shape, the middle is dark brown to purple in color . The tips are ovate and pointed. The top is keeled, the bottom has a deep longitudinal groove. The Pollinia oblong with a transparent outer edge. The corpusculum is wedge-shaped. The elongated, short caudiculae begin above the middle of the corpusculum. The flowers give off a sweet peach scent.
The follicle fruit is spindle-shaped with a warty surface and 10 to 13 cm long.
Geographical distribution and habitat
The distribution area of the species extends from Thailand, Malaysia to Indonesia (Borneo, Sumatra, Java, Sulawesi) and the Philippines. The species occurs from the mangrove to the hill country.
Taxonomy
The taxon Hoya coriacea was established by Carl Ludwig Blume in 1827 . The Plants of the World online database accepts Hoya coriacea as a valid taxon. There are currently two subspecies:
- Hoya coriacea subsp. coriacea
- Hoya coriacea subsp. philippinensis Kloppenb., Siar & Ferreras (2013)
A more recent synonym of Hoya coriacea subsp. coriacea is Hoya angustisepala Schltr. ex CM Burton (1987). Hoya coriacea Lindl. (1839) is a synonym of Hoya multiflora flower (1823). Hoya coriacea inches. ex Miq. (1857) is a synonym of Hoya diversifolia flower (1827).
literature
- Anthony Lamb, Michele Rodda (with contributions by Linus Gokusing, Steven Bosuang and Sri Rahayu): A Guide to the Hoyas of Borneo. Natural History Publications (Borneo), Kota Kinabalu, 2016 ISBN 978-983-812-170-5 , pp. 56/57
- Surisa Somadee and Jens Kühne: Hoya 200 different wax flowers. 96 p., Formosa-Verlag, Witten 2011 ISBN 978-3-934733-08-4 , p. 39.
- Anders Wennström and Katarina Stenman: The Genus Hoya - Species and Cultivation. 144 p., Botanova, Umeå 2008 ISBN 978-91-633-0477-4 , p. 48.
Individual evidence
- ↑ a b website about the genus Hoya by Simone Merdon-Bennack
- ↑ Ruth Kiev: Hoya coriacea flower. Flora of Malaysia i-Newsletter Part 3, 3 p., Undated (after 2012) Online at Google Books
- ↑ a b Kew Science - Plants of the World: Hoya coriacea flower
- ^ Carl Ludwig von Blume: Rumphia, sive, Commentationes botanicæ imprimis de plantis Indiæ Orientalis: tum penitus incognitis tum quæ in libris Rheedii, Rumphii, Roxburghii, Wallichii aliorum recensentur. Tomus 4. Lugduni-Batavorum / Leiden, 1835 p. 32 , plate 187 (online at Biodiversity Heritage Library)
- ↑ Robert Dale Kloppenburg, Monina V. Siar, Ulysses Ferreras Flores: Hoya coriacea subsp. philippinensis Kloppenb., Siar & Ferreras. Hoya New 1 (4): 44-50, 2013 [Online at Biodiversity Heritage Library]
- ^ Kew Science - Plants of the World: Hoya coriacea Lindl.
- ^ Kew Science - Plants of the World: Hoya coriacea Zoll. ex Miq.