Presence of one of the following characteristics show that the rauwolfia serpentine
is adulterated with other speciesof Russolia :
A Compound starcb grains
(B) Cluster crystals of calciun oxalate
(C) Limitied sclareids
D) Unlignified pericycle fibres
Answers
Answer:
Abstract
The history of tea is poorly known, mainly due to the questionable identification of decayed tea plants in archaeological samples. This paper attempts to test the utility of calciphytoliths (calcium oxalate crystals) for the identification of tea in archaeological samples. It provides the first survey of the macropatterns of calciphytoliths in several species of Theaceae and common non-Theaceae plants. Crystals were extracted from 45 samples of tea, Theaceae and common non-Theaceae plants, and detected microscopically between crossed polarizers. In tea plants, druse and trichome base are the most distinctive crystals. Druses have the smallest diameter (11.65 ± 3.64 μm), and trichome bases have four distinctive straight and regular cracks, similar to a regular extinction cross.