Annual or perennial herbs, erect,
creeping or climbing. Stems often 4-angled,
sometimes prickly. Stipules similar to the leaves.
Leaves (and leaf-like stipules) in whorls of 4-10, ± sessile. Flowers in axillary or terminal
cymes, bisexual, rarely unisexual, usually 4-merous, not enclosed in an involucre.
Calyx reduced to a rim; teeth 0. Corolla rotate to ± campanulate, greenish, creamy-white to bright yellow. Ovary 2-locular with 1
ovule per loculus. Fruit dry, glabrous or variously hairy, consisting of two 1-seeded mericarps. Derivation of name: Milk (the leaves of Galium verum were used to curdle milk in cheesemaking) Worldwide: 300 species, cosmopolitan The larvae of the following species of insect eat species of this genus: |
 |