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| Home | Start key | Fact sheets | Glossary | Common flowers | ||
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Use this feature to determine if flower petals (not sepals, though these may form a tube) are free or fused into a tube. Note that petals may be closely appressed but not fused.
Note: if you have Asteraceae heads, this feature applies only to disc florets, not ray florets.
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| petals not fused, not forming a tube Use this state if petals are completely distinct or fused only at the very base and not appearing to be a tube. |
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| petals fused, forming a tube Tubes are of various shapes and sizes (see the feature Corolla or perianth tube shape). |
some petals fused, others free, or all fused into an open (split) tube Also use this state if a tube is only partially split. |
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