Hoya exilis
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Hoya exilis is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya exilis is a particularly graceful, epiphytic , climbing plant with thread-like, sparsely branched shoots. The bare, round in cross-section shoots are only sparsely leafed and flexible. The spreading leaves are short-stalked, the glabrous petioles, which are slightly runny on top, are 0.4 to 0.7 cm long. The very thin leaf blades are elliptical-lanceolate, 5 to 10 cm long and 1.5 to 3.3 cm wide in the middle. They are bare on the top and bottom. The base is blunt to rounded, the apex is long and pointed. The leaf nerve consists of the prominent midrib and 4 to 5 secondary ribs each, which branch off from the midrib on both sides and which occasionally branch out at the end.
The umbel-shaped inflorescence contains 6 to 15 flowers. The slender, bare inflorescence stalks are 5 to 6 cm long. The very slender, thread-like flower stalks are 1.5 to 2 cm long. The ovate-lanceolate sepals are about 1 mm long and bare on the outside; the apex is pointed. The greenish-white corolla has a diameter of 1.1 cm. The petals are fused in the basal third. The rhombic-egg-shaped corolla lobes are bent back, the apices are pointed. They are glabrous on the outside, very finely hairy on the inside near the base, otherwise glabrous. The secondary crown has a diameter of 3 mm. The elongated corolla lobes are spread out. They measure about 2 mm from the tip of the inner process to the end of the outer process. The inner process is drawn out and ascending with short lobes, the outer process is blunt. The fleshy tips are rounded on the sides. The pollinia are oblique-egg-shaped with a broad, hyaline outer edge. The caudiculae are short, the corpusculum is rhombic and very small.
Similar Art
Hoya exilis is similar in flower size to Hoya chloroleuca , but differs significantly in the shape of the corolla lobes and the flower color.
Geographical distribution and habitat
The species occurs in Papua New Guinea along the mountain streams of the Albo at about 300 m above sea level and in the Kani Mountains at about 700 m above sea level. It was worse to find blooming on trees there in June 1907 and June 1908.
Taxonomy
The taxon was described by Rudolf Schlechter in 1913 . The two specimens mentioned by Schlechter are kept in the herbarium of the Botanical Garden Berlin under the numbers Schlechter # 17865 (Kani Mountains) and # 16172 (Abo) . The Plants of the World online database accepts the taxon as a valid species.
According to Burton, Hoya exilis belongs to the Plocostemma section of the genus Hoya R.Br ..
literature
- Robert Dale Kloppenburg: Dr. Schlechter's Hoya species. Fresno, California, 1993 Online at Biodiversity Heritage Library , pp. 62/63.
Individual evidence
- ^ Rudolf Schlechter: The Asclepiadaceen of German New Guinea. Botanical Yearbooks for Systematics, Plant History and Plant Geography, 50: 81–164, 1913. Online at Biodiversity Heritage Library , pp. 121/22.
- ↑ Kew Science - Plants of the World online: Hoya exilis Schltr.
- ↑ Christine M. Burton: Hoya exilis Schlechter vs. Hoya sp. from Tanna. The Hoyan, 11 (4): 86, 1990.