Myriophyllum brasiliense, Camb.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 312

4. M. brasiliense Camb. in St-Hil., FI. Bras. Mer.2‘. 252 (1830).

Stems up to 200 cm, often woody at base. Leaves 4-6 in a whorl, usually longer than internodes; emergent leaves light blue-green, covered by minute, transparent, hemispherical glands; segments 8-30. Flowers unisexual, solitary, axillary; bracts pinnatisect, resembling foliage leaves. Petals 5 mm in male flowers, absent in female. Stamens 8. Fruit 1-8 x 1*2 mm, ovoid, finely tuberculate. Cultivated for ornament and locally naturalized in S.W. France; frequently casual elsewhere in Europe. [Ga.] (Tropical and subtropical South America.)

Male flowers have not been reported from plants grown in

Europe or North America.