Lavatera maritima is a shrubby mallow originating from continental Portugal, valued for planting in coastal and sheltered borders. It prefers full sun or light shade and a well-drained soil with moderate moisture. Give it a sheltered position to suit its exposure needs and its average UK hardiness rating (H4). Suitable uses include mixed borders and coastal gardens.

Tree Mallow Lavatera maritima is a shrub from Portugal that prefers full sun, well-drained soil and a sheltered site.

https://en.wikipedia.org/wiki/Malva_subovata

Malva is a genus of herbaceous or woody, annual, biennial, and perennial plants in the family Malvaceae. It is one of several closely related genera in the family to bear the common English name mallow.

Lavatera maritima

Tree Mallow (Lavatera maritima) | Coastal shrub

Lavatera olbia is a shrub valued for ornamental use and particularly suited to coastal planting. It performs best in full sun or partial shade in well-drained soil with only moderate moisture. Native to the western Mediterranean, it is classed H5 (hardy) for UK conditions and works well in borders and seaside sites.

Garden tree mallow (Lavatera olbia) is a hardy shrub for borders and coastal gardens, preferring full sun to partial shade and well-drained soil.

https://en.wikipedia.org/wiki/Malva_olbia

Lavatera olbia

Garden Tree Mallow (Lavatera olbia) | Coastal & Border Shrub

Malva olbia, the garden tree mallow, is a species of flowering plant in the family Malvaceae. It is native to the western Mediterranean, and has been introduced to California.

Lavatera olbia 'Rosea'

Malva thuringiaca, the garden tree-mallow, is a species of flowering plant in the mallow family Malvaceae, native to eastern Europe and southwestern Asia, from southern Germany south to Italy, and east to southern Russia, Kazakhstan, and Turkey.