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Plantwise Technical Factsheet

aniseed (Pimpinella anisum)

Aromatic, erect, annual herb, (10-)15-50(-90) cm tall, with stem grooved and finely patently pubescent. Leaves alternate, entire to pinnately compound; petiole 4-10 cm long in lower leaves, gradually shorter to absent in uppermost leaves, always sheathing at base; blade of lower leaves orbicular-reniform, dentately lobed; blade of middle leaves pinnate or 3-foliolate with incised leaflets; blade of uppermost leaves 3-partite, subsessile. Inflorescence a terminal and leaf opposed, compound umbel; peduncle 2.5-7 cm long; involucre of bracts absent or short, 1-2-foliolate; primary rays 4-15, 0.5-2.5 cm long, hairy; secondary rays (pedicels) 7-13, 1-5 mm long, flowers bisexual; calyx indistinct; corolla with 5 obovate-cordate petals, 1-1.5 mm long, margin ciliate, apex inflexed; stamens 5, filaments longer than petals, inflexed at apex; pistil with inferior, bilocular, 2-carpelled ovary, styles 2, each with swollen stylopodium at base and globular stigma at top. Fruit a schizocarp, ovoid, 3-5 mm long, short hairy, at maturity splitting into 2 mericarps; mericarp 5-ribbed, with numerous oil ducts, containing a single seed; fruit wall connate with seed testa.

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