School of Sciences, Lautoka Campus Dicotyledonous families Cont School of Sciences, Lautoka Campus Dicotyledonous families Cont. BIO509 Botany Lecture 32: Family Rutaceae (Citrus Family)

15. Rutaceae • 158 – 161 Genera Rue or Citrus Family • 1800/1900 species Trees, shrubs, lianas or herb

Stem: Some taxa have thorns Leaves: Simple, trifoliate, or pinnate, sometimes pinnatifid exstipulate, usually with punctate glands

Punctate Glands

Flowers Inflorescence Cyme, raceme or solitary - Bisexual, actinomorphic and hypogynous - Calyx is aposepalous or synsepalous

- Gynoecium is syncaprous with superior ovary - Corolla is apopetalous or sym petalous - Stamens are usually diplostamenous in two whorls, with staminodes in some taxa - Anthers are longitudinal in dehiscence - Gynoecium is syncaprous with superior ovary

Calodendrum capense

axile Ovules Anantropous or hemitroupous, bitegmic, two per carpel Placentation axile Ovules Anantropous or hemitroupous, bitegmic, two per carpel

- schizocarp, berry, drupe or hesperidium Nectaries Usually present as an annular disk at the base of ovary Fruits - schizocarp, berry, drupe or hesperidium

General Facts: The Rutaceae family is commonly found in tropical regions . Economic importance Includes fruits, herbs, timber trees, and ornamentals. The largest numbers are found in Africa and Australia, often in semiarid wood lands Floral Formula: K 4 – 5 [2 - 3] C 4 - 5[0, 2 - 3] A 8 – 10 - ∞] G(4 - 5) [(1 - ∞)] , superior.

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