| 11. | It is an aquatic plant with threadlike roots that attaches to rocks.
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| 12. | Hindwings have small black spots and orange and black spots near threadlike tails.
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| 13. | Some have threadlike, trailing stems and some have fleshy, stout stems.
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| 14. | There is a long, thin, threadlike spur.
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| 15. | The threadlike flower stalk grows downward to a length of almost 30 cm.
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| 16. | These insects have four membranous wings and threadlike antennae.
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| 17. | This silk hardens on contact with the air to become a threadlike substance.
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| 18. | The leaves are up to 3 centimeters long and divided into threadlike lobes.
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| 19. | The leaves are divided into threadlike or needlelike lobes.
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| 20. | The inflorescence bears flowers on short, threadlike pedicels about a centimeter long.
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