Descriptor : vascular zone position
Descriptor type : categorical
In the subcortical zone, some fvb present a vascular zone included between the auricular lobes whereas in the central zone, this vascular zone is excluded as observed in some Trachycarpeae.
Must be described on developed fvb (not on the fvb near the apex).
[legend of the figure]
A fibrous vascular bundle (fvb) with its different characters. AL = auricular lobe; AS = auricular sinus; dcap = fibrous dorsal cap; MS = median sinus; RP = radiating parenchyma; TP = tabular parenchyma; vasc = vascular; vcap = fibrous ventral cap.
a: Sagittata;
b: Cordata;
c: Complanata;
d: Reniforma;
e: Lunaria;
f: Vaginata.
vascular zone
- included in the fibrous dorsal cap (between the two auricular lobes)
-
Included throughout the central cylinder
included between the auricular lobes
included between the auricular lobes
included between the auricular lobes
- excluded from the fibrous dorsal cap
-
Excluded throughout the central cylinder.
excluded
excluded
excluded
excluded
- excluded from the auricular lobes only in the central zone
-
And included in the subcortical zone.
exclude only in the central zone
exclude only in the central zone
exclude only in the central zone
exclude only in the central zone
exclude only in the central zone
