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Pakistan | Family List | Euphorbiaceae | Euphorbia

13. Euphorbia heterophylla L., Sp. Pl. 453. 1753. Boiss. in DC., Prodr. 15(2): 72. 1862; Stewart, Ann. Cat. Vasc. Pl. W. Pak. & Kashm. 449. 1972. quoad nomen tantum.


  • Euphorbia geniculata Ortega
  • Euphorbia prunifolia Jacq.
  • Poinsettia geniculata (Ortega) Klotzsch & Garcke
  • Poinsettia heterophylla (L.) Klotzsch & Garcke
  • Poinsettia prunifolia (Jacq.) Klotzsch & Garcke

    An erect subglabrous or sparingly-pubescent annual up to 90 cm tall. Leaves mostly opposite, all petiolate, the petioles up to 4 cm long. Leaf-blades variable, elliptic-obovate to elliptic-oblanceolate or sometimes narrowly-lanceolate, 1-15 x 0.5-8 cm, the upper often narrower than the lower, acute, subacute or obtuse at the apex, cuneate or rounded-cuneate at the base, entire, denticulate or dentate, lateral nerves up to 20 pairs, subglabrous and dull green above, sparingly-puberulous and paler beneath, the upper leaves sometimes faintly purplish-blotched at the base. Stipules sessile, glandular. Inflorescence a pseudo-dichasium or rarely a triradiate pseudopleiochasium, with the cyathia aggregated together in dense terminal clusters. Glands 1-2 (-3), stipitate, circular, concave. Fruits roundly trilobate, 4-4.5 x 5-5.5 mm, smooth, glabrous. Styles connate at the base, 1 mm long, bifid. Seeds is quadrangular-ovoid, basally truncate, 2-2.5 x 1.5-2 mm, coarsely bluntly tuberculate, dark brown, ecarunculate.

    Fl. & Fr. Per.: ± Throughout the year.

    Holotyper Cultivated at Hampton Court, Middlesex, UK, from seed from Tropical America, in Hb. Morison (OXF).

    Distribution: Throughout Tropical America from S. USA southwards; widely introduced into the Old World Tropics. In fields, farms and gardens; 1800'/550 m. -5000'/1525 in.


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