Hoya merrillii
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Hoya merrillii , inflorescence |
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Hoya merrillii is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya merrillii is a perennial , climbing, epiphytic plant. The bare shoots are 2 mm in diameter. The opposite leaves are stalked, the stems are thick and 1.5 cm long. The leaf blades are egg-shaped, 6 to 10 cm long and 5 to 7 cm wide (below the middle), they are far apart. They are stiff and convex, and glabrous on the top and bottom. They are light green with a shiny surface. The leaf veins are lighter green and easily recognizable.
The umbel-shaped inflorescence arises from the leaf axilla. It has about 20 to 30 flowers. The thick inflorescence stalks are persistent and 2 cm long. The bare flower stalks are very thin, 2 cm long and elongated. They widen just before the calyx. The short triangular sepals are very, only about 1.5 mm long. The apex is tightly rounded, granular on the outside, glabrous on the inside with a ligula between the slightly overlapping bases of the sepals.
The corolla is light yellow. The petals are only fused at the base. The corolla lobes are therefore long, 0.4 cm long and 0.2 cm wide. They are spread out in a star shape, after about half the length they bend upwards. Spread out completely in a star shape, the corolla has a diameter of 0.9 to 1.0 cm. The tips are egg-shaped and taper off. They are very finely hairy on the inside and bare on the outside. The edges and the tip are usually slightly bent.
The secondary crown is white. The tips of the secondary crown are egg-shaped and pointed. They are 3 mm long, elliptical and rise easily. The base is broadly rounded, the apex pointed. The top is apically concave, deepened to the pitted base. The stylus head is conical. The pollinia show a lateral keel. The caudiculae are thickened. The corpusculum is very small and diamond-shaped.
Similar Art
Hoya merrillii resembles the Hoya verticillata in habit. It differs from this species in that the flowers are covered with fine hairs. The tips of the tips of the corolla are curved upwards, as are the tips of the corolla.
Geographical distribution and habitat
The species occurs in the Philippines. Collected in Luzon (Nueva, Vizcaya, Tayabas, Cavite, Camerines), Mindoro , Panay , Mindanao ( Davao ).
Taxonomy
The taxon was proposed by Rudolf Schlechter in 1904. The holotype came from Palo, Mindoro, Philippines and is kept in the herbarium of the Botanical Garden Berlin (Merrill # 2218). Currently the species is divided into two subspecies:
- Hoya merrillii subsp. merrillii and
- Hoya merrillii subsp. frakei Kloppenburg (2019).
literature
- Robert Dale Kloppenburg: Philippine Hoya Species. Orca Publishing Co., Medford, Oregon, 1991, pp. 66/67.
- Robert Dale Kloppenburg, Ann Wayman: The World of Hoyas - a book of pictures. A revised version. Orca Publishing Company, Central Point, Oregon 2007, ISBN 0-9630489-4-5 , pp. 170/71
- Anders Wennström and Katarina Stenman: The Genus Hoya - Species and Cultivation. 144 p., Botanova, Umeå 2008 ISBN 978-91-633-0477-4 , p. 95.
Individual evidence
- ^ Rudolf Schlechter, Otto Warburg: Asclepiadaceae. In: Janet Russell Perkins: Fragmenta Florae Philippinae. Contributions to the Flora of the Philippine Islands, pp. 119-136, 1904. Online at Biodiversity Heritage Library , p. 131.
- ↑ Robert Dale Kloppenburg: Hoya merrillii subsp. frakei Kloppenburg 2019. Hoya New, 9 (3): 16–17, 2019 Online at Biodiversity Heritage Library