Identification of tympanoids

SARCANDRAE HERBA

[Source] This product is derived from Sarcandra glabra (Thunb.

【Properties】The medicinal material is dried whole plant

【Microscopic Identification】

(1) The cross section of the stem of this product: the epidermis is rectangular or oblong, with a cuticle on the outside, and the outer edge is obtuse

(2) The powder is yellowish green to greenish brown

【Character identification characteristics】

(1) The stem is cylindrical and branched

(2) The surface is dark green to dark brown, with obvious fine vertical lines and scattered longitudinal lenticels

(3) The knot is enlarged

(4) The leaves are opposite, the leaves are ovate-lanceolate to ovate-elliptic, with thick serrations on the edges

(5) The petiole is about 1cm long and nearly leathery

(6) The spikes are terminal and often branched

【Microscopic identification features】

(1) There are more than 10 rows of cortical cells, and 2 to 3 rows of thick keratinocytes on the outside

(2) The inner parenchyma cells contain brown-yellow pigment, and the stone cells are scattered individually or in groups

(3) The fiber bundles of the pericylindrical sheath are crescent-shaped, intermittently ringed, and woody

(4) There are many tracheids in the xylem, and the rays are 2-8 rows of cells

(5) Wood parenchyma cells are square or rectangular, with brown-yellow pigment inside

(6) The epidermal cells on the leaves are square or rectangular, and the vertical peripheral wall is curved or slightly straight in a microwave shape
.