Iva L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 142

48. Iva L. 1

Annual or perennial herbs or shrubs. Leaves alternate or opposite. Capitula small, in spikes or panicles. Involucral bracts 5, in one row. Receptacle with scales. All florets tubular. Marginal florets female, few; inner male. Achenes cuneate-obovate, somewhat compressed; pappus absent.

Literature: R. C. Jackson, Univ. Kansas Sci. Bull. 41: 793-876 (1960).