Are all trumpet-shaped flowers morning glories?

Without further ado, the pictures and text will make the explanation clearer.

Round-leaved morning glory

A type of morning glory. The leaves are alternate, broadly ovate or nearly round. The leaves are round without corners, and the surface of the plant is covered with white hairs.

Morning glory

A type of morning glory. It has three very obvious characteristics: the sepals below the flowers are linear-lanceolate; the leaves are three-lobed; and the whole plant has dense short bristles.

Petunia

Petunia belongs to the Solanaceae family. It got its name because its flower shape resembles morning glory and is much smaller in comparison, but it has nothing to do with morning glory.

Five-clawed golden dragon

Ipomoea aquatica is a perennial twining herb of the Convolvulaceae family. The most easily discovered difference between it and morning glory is that the plant body is completely hairless.

The leaves of the five-clawed golden dragon are palm-shaped with 5 deep or completely lobed parts, and the lobes are ovate-lanceolate, ovate or elliptical. The middle lobe is larger, and the lobes on both sides are slightly smaller.