The Buttercup family - ranunculaceae - comprises about 2000 species of plants mainly spread in temperate
countries. Most of them are herbs and lianas having big flowers, so they are very valuable in gardening. They are
also very well known because many of them are poisonous plants.
Leaves (1): Generally alternate and divided; some genera such as clematis are opposite.(2)
Stems (3): In most of the cases they are herbaceous. In clematis, ligneous.
Calyx: 5 sepals- clematis has four (5) . Sometimes sepals are colored, reminding petals.
Some genera - hepatica, for example- have bracts under the sepals very similar to a calyx.
Corolla: 5 petals. Under them some species have
nectar glands which in cases as aquilegia(6) o Delphinium (7) extend themselves behind the petals like