polyarch

polyarch

(ˈpɒlɪˌɑːk)
adj
(Botany) botany (of a woody tissue) having multiple points of origin
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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.