Hoya baishaensis
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| Hoya baishaensis | ||||||||||||
| Shao Y.He. & PTLi |
Hoya baishaensis is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya baishaensis is a perennial epiphytic plant with stiff, bare shoots that are up to 3 m long. It attaches itself to the ground with fine adhesive roots. The leaves are stalked, the petioles are 1.5 to 4 cm long. The leaf blades are narrow-elliptical, 7 to 21 cm long and 3.5 to 5 cm wide. The base is attenuat, the apex pointed. The midrib protrudes strongly on the upper and lower sides, the branching leaf veins are only indistinctly developed. The top is green, the bottom a little lighter.
The umbel-shaped flower stalk arises from the leaf axils and contains about 8 flowers. The inflorescence stalk is 3 to 4 cm long. The flower stalks are 2 to 3.5 cm long; they have purple or purple-brown spots in an irregular mosaic pattern on the surface. The sepals are egg-shaped and about 1 mm long. The apex is pointed, the outside shows purple or purple-brown spots. The star-shaped corolla is fleshy and 1.5 to 2.8 cm in diameter. It is green on the inside, greenish on the outside with purple spots. The petal lobes are ovate-triangular, about 7 mm long and about 5 mm wide at the base. The tips of the secondary crown are whitish and fleshy. The outer extension is rounded and the inner extension is pointed. The pollinia are elongated with a translucent edge. The caudiculae are short and thin. The corpusculum is rhombic and comparatively large. Fruits and seeds are not known. The plant bloomed on the natural site from July to September.
Similar species
Hoya baishaensis is similar to Hoya griffithii and Hoya radicalis . The flowers of Hoya griffithii are somewhat larger, the flowers of Hoya radicalis somewhat smaller. Both species also have white flowers.
Geographical distribution and habitat
The species is so far only known from the province of Hainan, China ( ). The site is 786 m above sea level in a primary mountain rainforest. The specimen grew on exposed rock surfaces.
Taxonomy
The taxon was first described in 2009 by Shao-Yun He and Ping-tao Li. The type copy was collected on August 1, 2006 by Shao-yun He, Ping-tao Li & Jia-yi Lin. The holotype is in the herbarium of the South China Agricultural University in Guangdong. Prov. Guangzho kept under No. 608011. One paratype has the number 608012.
In Plant of the Worlds online the taxon is accepted as a valid taxon.
literature
- Shao-Yun He, Xue-Ying Thuang, Ping-tao Li, Jia-Yi Lin, Min Li: Hoya baishaensis (Apocynaceae), a new species from Hainan, China. Annales Botanici Fennici, 46: 155-158, Helsinki 2009