What are the morphological characteristics of geraniums?

Morphological characteristics of geraniums: plant height 30 cm to 60 cm, the whole plant covered with fine hairs and glandular hairs, with an unusual odor. Stems succulent. Leaves alternate, round to kidney-shaped, usually with a horseshoe-shaped pattern inside the leaf margin. Umbels terminal, with a long common peduncle; flowers come in white, pink, flesh red, light red, bright red and other colors, and there are single-petaled and double-petaled forms, as well as variegated-leaf varieties with white, yellow and purple markings on the leaf surface. The flowering period is from May to June; except for dormancy in midsummer, it can keep blooming if the environment is suitable. It prefers cool conditions, but is not cold-tolerant. It dislikes high temperatures, prefers full sunlight, and prefers well-drained fertile loam; it is not tolerant of waterlogging, and excessive humidity easily causes leggy growth, while it is slightly tolerant of drought. The optimum growing temperature is around 15°C during the day, and not lower than 5°C at night. In summer it goes dormant or semi-dormant, so it should be placed in partial shade and watering should be controlled.