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.
armatus, which forms and functions before the secondary xylem, is in the shape of a multipointed star (polyarch stele) surrounding a pith (Figure 19).
These are: #7, arborescence absent [right arrow] present; #16, root anatomy 2-5 arch [right arrow] polyarch; #26, stipules absent [right arrow] present; #33, dictyostele absent [right arrow] present; #34, polycyclic stele absent [right arrow] present; #38, borders on metaxylem pitting present [right arrow] absent; #39, phloem disposition ectophloic [right arrow] amphiphloic; and #66, sporangia fused forming synangia absent [right arrow] present.