Category: S
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Spinulose
(Of pollen exine) with small spines.
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Spinule
A very small spine.
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Spinous
With spines. Like a spine or thorn in shape; having spines.
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Spinose
With spines (mostly used for leaf margin). With a spine at the tip. Thorny.
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Spiniform
Spine-shaped, thorn-like.
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Spine-shield
Horny pad from which the spines stick out (e.g. in Euphorbia) [unusual term].
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Spinescent
± spiny, ending in a sharp point. Degenerating into a thorn.
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Spinescence
Spininess.
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Spine
A sharp-pointed, hardened structure derived from a leaf, stipule, root or branch, but always originating from the vascular or woody part. (Thorn is derived from a reduced branch, pointed structures from the epidermis are called prickles). A firm, slender, sharp-pointed structure, representing a modified leaf or stipule; more loosely, a structure having the appearance of…
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Spindly
Thin.