Armed.
Bearings thorns, spines, or prickles:
Thorn.
A stiffy, woody, modified stem with a sharp point; sometimes applied to any structure resembling a true thorn.
Spine.
The hard and sharply-pointed tip of a branch or leaf, usually round in cross section.
Prickle.
A sharp-pointed outgrowth from the epidermis or cortex of any organ.
Unarmed.
Lacking spines, prickles, or thorns.