Ampelocissus xizangensis (Ampelocissus xizangensis)
Description
Ampelocissus xizangensis (xi zang suan lian teng in Chinese) is a deciduous vine in the Vitaceae family,native to shrublands in the high valleys of the Tibet Autonomous Region and Nepal,at elevations about 2000 m high.Its specific epithet is a toponym derived from the place it was collected from,Xizang,which is the Chinese name for the Tibet Autonomous Region.It was first scientifically described in 1997 by the Chinese botanist,Li Chao-Luang.The lianas of A.xizangensis are woody.Its climbing branchlets,which are cylindrical and gradually tapering,have longitudinal ridges and sometimes a slight,pale wooliness.Dividing off from them are characteristically bifurcated tendrils,which appear as twisting cork-screws.These grow towards and slowly grip whatever tall,stationary object they happen upon.This action,called circumnutation,has the real effect of securing and pulling the branches higher,thus enabling its leaves exposure to the sun for photosynthesis.The whole process is repeated continuously throughout the life-cycle of the plant.he leaves of A.xizangensis are simple.Leaflets are typically between 23 – 24 cm long,broadly ovate,cordate at their bases,rounded and obtuse at their apexes,and finely-toothed on their margins.Each has 5 basal veins,and 4 or 5 pairs of lateral veins.Smaller veins are barely noticeable on the leaf's upper (adaxial) surface,while being slightly prominent on the under (abaxial) side.They are intricately downy with brown tomentum adaxially,and covered in somewhat long and straight,slightly stiff but weak,hairs abaxially.The petiole is about 15 cm long,and only covered sparsely in brownish,arachnoid hairs,which tend to be shed over time.
Taxonomic tree
-
Domain: Eukarya
-
-
Kingdom: Plantae
-
-
Phylum:
-
-
Class: Magnoliopsida
-
-
Order: Vitales
-
-
Family: Vitaceae
-
-
Genus: Ampelocissus
-
-
-
-
-
-
