Polyarch - definition of polyarch by The Free Dictionary
(Botany) botany (of a woody tissue) having multiple points of origin
References in periodicals archive
The vascular cylinder is a polyarch
, and the pericycle is formed by approximately four cell layers with walls that become gradually thicker (Figures 22-24).
There is single layer root epidermis with thick cuticle, polyarch
vascular bundle and radial with exarch xylem.
The root is polyarch
, the hypocotyl is very short, the cotyledons have an oily and starchy reserve, the epicotyl has stem structure, and eophylls and metaphylls are dorsiventral.