Classifying Taiwan Lianas with Radiating Plates of Xylem
Yang S.Z.; Chen P.H
151 - 159
Radiating plates of xylem are a lianas cambium variation of which 22 families have this feature. This study investigates 15 liana species representing nine families with radiating plates of xylem structures. The features of the transverse section and epidermis in fresh liana samples are documented including shapes and colors of xylem and phloem ray width and numbers and skin morphology. Experimental results indicated that the shape of phloem fibers in "Ampelopsis brevipedunculata" var. "hancei" is gradually tapered and flame-like which is in contrast with the other characteristics of this type including those classified as rays. Both inner and outer cylinders of vascular bundles are found in "Piper kwashoense" and the irregularly inner cylinder persists yet gradually diminishes. Red crystals are numerous in the cortex of "Celastrus kusanoi." "Aristolochia shimadai" and "A. zollingeriana" develop a combination of two cambium variants radiating plates of xylem and a lobed xylem. The shape of phloem in "Stauntonia obovatifoliola" is square or truncate and its rays are numerous. Meanwhile that of "Neoalsomitra integrifolia" is blunt and its rays are fewer. As for the features of a stem surface within the same family "Cyclea ochiaiana" is brownish in color and has a deep vertical depression with lenticels "Pericampylus glaucus" is greenish in color with a vertical shallow depression. Within the same genus "Aristolochia shimadai" develops lenticels which are not in "A. zollingeriana"; although the periderm developed in "Clematis grata" is a ring bark and tears easily that of "Clematis tamura" is thick and soft.