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The following points highlight the thirteen main types of corolla in plants. The types are: 1. Cruciform 2. Caryophyllaceous 3. Rosaceous 4. Campanulate 5. Tubular 6. Infundibuliform 7. Hypocrateriform 8. Urceolate 9. Rotate 10. Butterfly-like or Papilionaceous 11. Ligulate 12. Bilipped or Bilabiate 13. Personate or Masked.
Corolla in Plants: Type # 1. Cruciform:
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Petals are differentiated into a claw and a limb, and all the four petals are arranged in the form of a cross, e.g., members of Cruciferae.
Corolla in Plants: Type # 2. Caryophyllaceous:
When five petals are clawed and have their limbs spreading out, e.g., members of Caryophyllaceae.
Corolla in Plants: Type # 3. Rosaceous:
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When five or more petals are spreading like that of a rose, e.g., Rosaceae.
Corolla in Plants: Type # 4. Campanulate:
Bell-shaped corolla, e.g., Campanula, Physalis.
Corolla in Plants: Type # 5. Tubular:
Regular, gamopetalous corolla with their petals fused to form a tube, as in disc florets of Compositae.
Corolla in Plants: Type # 6. Infundibuliform:
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Regular, gamopetalous corolla with their petals in the form of a funnel, e.g., members of Convolvulaceae.
Corolla in Plants: Type # 7. Hypocrateriform:
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Regular, gamopetalous, salver – shaped corolla, i.e., basal portion is narrow and tubular with the abruptly expanding flat apical part, e.g., Clerodendron.
Corolla in Plants: Type # 8. Urceolate:
Urn or pitcher – shaped corolla with the broad middle part, e.g., Bryophyllum, Petrospora.
Corolla in Plants: Type # 9. Rotate:
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Regular, gamopetalous, wheel-shaped corolla with narrow and short corolla tube, and the limbs of petals being at right angle to the tube, e.g., Nyctanthes.
Corolla in Plants: Type # 10. Butterfly-like or Papilionaceous:
It is irregular, polypetalous corolla with its five petals arranged so as to resemble a butterfly. It consists of a posterior largest ‘vexillurri, two lateral ‘alae’ and two anterior fused petals called ‘keel’, as in members of Papilionaceae.
Corolla in Plants: Type # 11. Ligulate:
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It is a strap-shaped, zygomorphic, gamopetalous corolla, with a short, narrow tube and strap-like, flat upper portion, e.g., ray florets of Compositae.
Corolla in Plants: Type # 12. Bilipped or Bilabiate:
Zygomorphic, gamopetalous corolla, in which petals are so fused together that they appear to be divided into two separate lips, e.g., Adhatoda, Ocimum.
Corolla in Plants: Type # 13. Personate or Masked:
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It is also bilabiate corolla but here the mouth of the corolla is closed because two lips are very close to each other, e.g., Linaria.
