Learn about the comparison among Asteraceae, Apiaceae and Rubiaceae.
Comparison # Asteraceae (Compositeae):
1. Habit-Usually herbs with milky juice.
2. Leaves-Simple, alternate, exstipulate.
3. Inflorescence-Capitulum.
4. Flower-Unisexual, or bisexual, actinomorphic, or zygomorphic epigynous.
5. Calyx-Represented by pappus.
6. Corolla-Petals 5, gamopetalous, valvate.
7. Androecium-Stamens 5, syngenesious, epipetalous, anthers introrse.
8. Gynoecium-Bicarpellary, syncarpous with basal placentation, Ovary inferior.
9. Fruit-Cypsela.
10. Floral formula-
Comparison # Apiaceae (Umbelliferae):
1. Habit-Usually herbs.
2. Leaves-Decompound, alternate.
3. Inflorescence-Umbel.
4. Flower-Hermaphrodite, actinomorphic and epigynous.
5. Calyx-Sepals 5.
6. Corolla-Petals 5, polypetalous.
7. Androecium-Stamens 5, free, anthers versatile.
8. Gynoecium-Bicarpellary, syncarpous, bilocular, axile placentation, inferior.
9. Fruit-Cremocarp.
10. Floral formula-
Comparison # Rubiaceae:
1. Habit-Herbs or woody shrubs.
2. Leaves-Simple, opposite and stipulate-interpetiolar.
3. Inflorescence-Cymose-biparous generally.
4. Flower-Hermaphrodite, actinomorphic and epigynous.
5. Calyx-Sepals 4 or 5, gamosepalous.
6. Corolla-Petals 5 or 4, gamopetalous, valvate or imbricate.
7. Androecium-Stamens 5 or 4, epipetalous, polyandrous anthers introrse.
8. Gynoecium-Bicarpellary, syncarpous, bilocular, axile placentation, inferior.
9. Fruit-Berry, drupe or capsule.
10. Floral formula-
