This part is some 20 cm long. Flower heads are 20 mm in diameter, flowers were relatively big, some 5-6 mm long, with visible hairy tube, longer than the calyx. Leaves are 3-4 cm long. It was collected in Split, S Croatia. Is this Lantana camara?
Definitely Lantana sp., probably L. camara. See below:
Leaves with ovate lamina, ~3–8 cm long and ~15–45mm wide, apex ± acute to obtuse, base ± rounded, margins toothed, upper surface wrinkled and strigose, lower surface ± pubescent; petiole ~5–20 mm long.
Flower heads ~2–3 cm in diameter; peduncle ~2–8 cm long; bracts lanceolate, ~4–7 mm long. Corolla 10–14 mm long, with white, yellow, orange, red or pink colours in various combinations.
Certainly, it seems Lantana camara, which is present in some of the Macaronesian archipelagos, e.g. Azores and the Cape Verdes, where it is locally common. Many plants of this species have typical orange-yellowish flowers.
I think the identification as Lantana camara L is more appropriate than L. aculeata due to the following observation. The leaf-lamina appears crinkled with soft hairy abaxial surface. The petiole looks densely hairy. However nothing like looking at a fresh sample.