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Pakistan | Family List | Brassicaceae | Sisymbrium

Sisymbrium irio Linn., Sp. Pl. 659. 1753. Hook.f., l.c. 150; Schulz in Engl. & Prantl, l.c. 597; Vas. in Kom., l.c. 44; Hedge in Rech.f., l.c. 314.

Sisymbrium irio

Credit: Shaukat & Azmat

  • Descurainia irio (Linn.) Webb & Berth.
  • Sisymbrium irio var. irioides (Boiss.) O.E. Schulz
  • Sisymbrium irioides Boiss.
  • Sisymbrium subhastatum auct. non Hornem.

    Annual, (10-)20-60 cm tall, erect, branched, glabrous or sparsely hairy with simple hairs. Basal and lower leaves petiolate, pinnately lobed with a hastate terminal lobe larger than the laterals, 2-6-jugate, very variable in size; cauline leaves similar but only 1-3-jugate. Racemes 50-80(-100)-flowered, up to 30 cm long in fruit with siliquae overtopping young flowers and buds. Flowers c. 3 mm across, yellow; pedicels (5-)10-15 mm long in fruit, filiform, ascending or sub-spreading, rarely spreading. Sepals 2-2.5 mm long. Petals (2.5-) 3-4 mm long, c. 1 mm broad, usually slightly longer than the sepals. Stamens c. 2:3 mm long; anthers c. 0.5 mm long. Siliquae (25-)30-45 mm long, 1 mm broad, linear, often slightly upcurved; valvex submembranous, convex, obscurely to distinctly torulose, faintly 3-veined but the mid-vein distinct, glabrous; style inconspicuous, thickened, with a depressed, sub-bilobed stigma; septum hyaline; seeds 20-40 in each locule, c. 1 mm long, oblong-ellipsoid, yellowish-brown.

    Fl. Per.: March-May.

    Type: Described from W. Europe: Herb. Linn. no. 836/38-39 (LINN).

    Distribution: Europe, most of Asia and N. Africa.

    A common species found from hills to plains in our area; very variable in leaf, flower and pedicel size. but rocket like leaves, smaller flowers and fruits on thin ascending pedicels distinguishes it.


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