| 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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| spiracles |
Oval or round openings in the body of caterpillars- part of their respiratory system.
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| sporangia |
Spore-bearing structures on ferns and on some slime molds.
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| sporocarps |
In ferns, the structures that encloses the sporangia, which in turn contain spores.
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| sporophyte |
In mosses, the spore-producing portion of the plant. See also gametophyte.
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| sporophytes |
The plural of sporophyte - in mossed, the spore-producing portion of the plant.
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| stamen |
The male organ on plants, consisting of filament and pollen-producing anther.
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| stamens |
Plural of stamen - the male organ of plants.
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| staminate |
With stamens, the pollen-bearing organ of a flower.
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| stigma |
In plants - the tip of the pistil, which is usually enlarged; it receives the pollen. In odonata - a cell near the wing tip that differs in color from the rest of the wing. In skipper butterflies - a dark patch in the folds of the forewing that consists of modified scent scales.
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| stigmas |
Plural of stigma = In plants - the tip of the pistil, which is usually enlarged; it receives the pollen. In odonata - a cell near the wing tip that differs in color from the rest of the wing. In skipper butterflies - a dark patch in the folds of the forewing that consists of modified scent scales
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| stipule |
A small, leaf-like appendage at the base of a leaf stalk.
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