Page 262 - Pharmacognosy 2 PG303

Pharmacognosy-2 (PG303) Level 2 Clinical Pharmacy-Pharm D

1. Aconite tuberous root; a, wrinkled surface; b, grooves. 2. T.S.
diagram; a, metaderm. b, endodermis; c, cambium; d, xylem; e,
secondary cortex, f, primary cortex; g, sclereides. 3. Detailed T.S.;
a, metaderm; b, sclereides; c, primary cortex; d, endodernis; e, secondary
cortex; t, sieve tissue; g, starch; h, cambium; I, xylem

Powder
Powdered aconite is grayish brown to deep brown; characterized by.

I- Large amount of parenchyma containing starch granules.
2- Very few fragments of spiral, reticulate or pitted vessels; occasional scleried

cells which are rectangular, evenly thickened, with simple pits and large lumen,
100-400 p long and occasional fibers from stem, being very long, with lignified
walls and marked with transverse or oblique slit-like pits.
3- Very numerous starch granules, simple or compound of 2-4 or may be up to 6
components: individual granules, spherical or piano-convex, 3-30 mostly 8-
15 μ in diameter, frequently with central cleft-like hilum and calcium oxalate
crystals.
4- True cork cells are absent.

1- Outer layer in surface view 6- Part of a fiber from the

showing pigment. stem base.

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