2006-09-24 07:32:42 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Botany
No, it is not necessary!
in Hibiscus sepals are fused and petals are free
in Datura sepals and petals are fused.
in Annona sepals and petals are free.
In Tridax sepals form pappus and petals are fused.
2006-09-25 03:08:52 · answer #1 · answered by krishna m 2 · 0⤊ 0⤋
If you're talking about fused petals and fused sepals it's possible. Flowers with fused petals and/or sepals look like tubes. A way to tell if they are fused or not is to try to pull them apart individually. If just one sepal or petal comes off by itself, then they're not fused. If they were fused, they'd all be pulled off at once. Even if petals are fused, the sepals aren't always fused. Sometimes you can have fused sepals, but not non fused petals. You can also have flowers that are missing either petals or sepals.
2006-09-24 22:26:21 · answer #2 · answered by Cloudshadow 2 · 0⤊ 0⤋
No, petals can be fused and sepals free. A good example is the heath, Erica (see pic) and most other members of the same family (which includes blueberries).
The reverse can also occur, in genera like Cercis, Cassia etc (see second pic)
2006-09-25 09:23:58 · answer #3 · answered by myrtguy 5 · 0⤊ 0⤋
No....I'm not sure that I've ever seen a flower in which the sepals were actually joined together.
2006-09-24 14:36:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋