1. Is the flower tube longer than
the lobes of the corolla?
|
YES
|
2. Do the flowers bloom in early spring as the leaves are expanding?
|
YES
|
3. Are the flowers fragrant?
|
YES
|
|
4. Is the flower sticky due to the presence of
"glandular hairs"? The flower might be yellow through
deep orange, and the tube is often tinged with rose red. However,
there should be no blotch.
- Yes The flower is probably
R. austrinum
- No. The plant may be a hybrid.
|
|
NO
|
|
5. Is the flower bright scarlet, red,
or orange with a large orange blotch? The corolla usually does not have
any glands on the outside so it is not usually sticky.
- Yes The flower is probably
R. flammeum
- No. The plant may be a hybrid.
|
|
NO
|
|
6. Are the flowers orange or scarlet and does the plant
bloom very late in July and August? Next year's flower buds are
usually formed already.
- Yes The flower is probably
R. prunifolium
- No. The plant may be a hybrid.
|
|
NO
|
7. Do the undersides of the leaves have a waxy white or bluish color?
|
YES
|
|
8. Are the flowers orange or red and bloom long after the foliage
has fully expanded?
- Yes The flower is probably
R. cumberlandense
- No. The plant may be R. calendulaceum or possibly a hybrid.
|
|
NO
|
|
9. Are the flowers yellow to orange-red and open with, or shortly
after, the foliage expands?
- Yes The flower is probably
R. calendulaceum
- No. The plant may be R. cumberlandense or possibly a hybrid.
|
|