Hoya engleriana
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Hoya engleriana is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya engleriana is an epiphytic growing plant with thread-like shoots measuring only about 2 mm in diameter. Young plants tend to grow upright, and with increasing age the branches hang down. The downy-haired shoots are heavily branched and densely leafed. The leaves are short or very short stalked. The stems have joint pads. The slightly fleshy leaf blades are narrowly ovate-lanceolate, they measure 1.5 cm in length and 0.4 cm in width. They are convexly arched with rolled up edges, and thus deeply indented on the underside. They are dark green on top and covered with a waxy layer. The veins can hardly be seen on the upper side. The top and bottom are covered with white, downy hair.
The little flowered (usually 4 to 5 flowers), umbel-shaped inflorescences are terminal and have little or short stalk. The flower stalks are approx. 5 mm long and hairy. The white corolla is spread out in a star shape with a diameter of 1.5 cm. It is fleshy, bald on the outside, densely covered with short, weak downy hairs on the inside. The petal lobes are broadly egg-shaped triangular and drawn out to a long point. The edges of the tips are slightly bent back, as are the tips. The secondary crown is pink to purple in color. The tips of the secondary crown are blunt and apically darker. The inner process is long pointed, curved upwards and becomes darker towards the apex.
The flowers are fragrant (Hoffmann et al.) Or have a fresh scent (Wennström & Stenman).
Similar Art
Hoya engleriana is very similar to Hoya linearis Wall in terms of its habitus and leaves and flowers . ex D.Don. However, Hoya linearis differs in its longer leaves, which are much closer to the shoots, and the leaf cross-section. The flowers are also clearly different.
Geographical distribution and habitat
Northern Thailand, Cambodia, Laos and Vietnam. The habitat is an evergreen rainforest at higher altitudes (Thailand: 1580 m).
Taxonomy
The taxon was established by Carl Curt Hosseus in 1907. The type was collected by him alive on trees near the summit (around 1580 meters above sea level) of Doi Suthep and brought to Berlin. The whereabouts of the types is not known.
literature
- Christiane Hoffmann, Ruurd van Donkelaar, Focke Albers: Hoya. In: Focke Albers, Ulli Meve (Hrsg.): Succulent lexicon. Volume 3: Asclepiadaceae (silk plant family). Ulmer, Stuttgart 2002, ISBN 3-8001-3982-0 , pp. 147-160 (p. 152).
- Anders Wennström, Katarina Stenman: The Genus Hoya - Species and Cultivation. Botanova, Umeå 2008, ISBN 978-91-633-0477-4 , p. 55.
- Surisa Somadee, Jens Kühne: Hoya 200 different wax flowers. Formosa-Verlag, Witten 2011, ISBN 978-3-934733-08-4 , p. 45.
Individual evidence
- ↑ Carl Curt Hosseus: Two interesting novelties from Siam in the Kgl. Bot. Garden to Dahlem. In: Notblatt des Königl. Botanical Garden and Museum in Berlin. Volume 4, Berlin 1907, pp. 314-318 ( online at Biodiversity Heritage Library ).