| scutellum |
In insects, a triangular section on the dorsal surface of the thorax behind the pronotum.
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| secondaries |
The secondaries are the inner trailing feathers on the wing.
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| sepal |
A usually green leaf-like division of the calyx.
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| sepals |
Plural of sepal - a leaf-like division of the calyx.
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| sessile |
Not stalked.
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| seta |
When referring to mosses, the stalk which supports a capsule.
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| sheath |
That portion of a leaf which surrounds the stem of a grass or a sedge.
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| silique |
An elongated, dry fruit which splits in two at maturity.
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| sori |
Clusters of sporangia on ferns.
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| spatulate |
When pertaining to a leaf - spatula or spoon-shaped.
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| speculum |
The speculum is a small patch of iridescent feathers on the trailing edge of the inner portion of the wings.
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| spike |
A cluster of flowers on a slender stem; the flowers lack individual stalks.
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| spikelet |
The basic flowering unit in grasses, consisting of two glumes at the base plus one-many florets.
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| spikelets |
Plural of spikelet - the basic flowering unit in grasses, consisting of two glumes at the base plus one-many florets.
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| spine |
A sharp-pointed modification of a branch.
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