1. Does the plant bloom in
early spring before the leaves have expanded?
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YES
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2. Do the flowers have a yellow blotch on the upper corolla
lobe and are they fragrant?
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YES
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3. Do the flowers open before the leaves have fully expanded and the bud
scales have no sticky glandular hairs?
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- Yes - The species is probably
R. alabamense
- No. If there are glandular hairs on the leaf margins and petiole,
the plant is probably R. occidentale.
If the bud scale margins are glandular and the flowers bloom after
the foliage is fully expanded, it might be the new
R. eastmanii. Otherwise, the plant might be a hybrid.
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NO
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4. Are the flowers covered with very sticky gland-tipped
hairs and have a strong musky-sweet odor?
- Yes - The species is probably
R. atlanticum
- No. The plant might be a hybrid, or else a white form of another
species in the pink group.
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NO
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5. Are the leaves and stems very smooth and have no hairs?
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YES
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6. Do the
flowers have a bright red style as well as a strong cinnamon-like
fragrance?
- Yes - It is probably
R. arborescens
- No.
If the the stamens and style are red but the the stems have hairs making
them pubescent,
it might be the new
R. eastmanii. Otherwise, the plant might be a hybrid.
|
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NO
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7. Do the flowers have sticky gland-tipped hairs, greenish-white
stamens and pistils, and a sweet musky fragrance?
- Yes - The plant is probably
R. viscosum
- No. The plant might be a hybrid, or else a white form of another
species in the pink group.
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