1. Armeria Willdenow, Enum. Pl. 1: 333. 1809.
Thrift [Celtic ar mor, at seaside, alluding to habitat]
Claude Lefèbvre, Xavier Vekemans
Plants herbs, perennial, scapose, acaulescent; taprooted, rootstocks branched, woody. Leaves in basal rosettes, sessile; blade linear to linear-spatulate [lanceolate], narrowed or straight to base, margins entire. Scapes glabrous or densely pubescent, sometimes rugose, enclosed by tubular leafless sheath at apex. Inflorescences solitary, apical, dense hemispheric heads of scorpioid cymes, each surrounded by involucre of scarious bracts. Pedicels absent or present (short). Flowers monomorphic or dimorphic (in pollen and stigma characteristics); calyx 10-ribbed, funnel-shaped; tube usually pubescent on ribs only or all around, rarely glabrous, limbs membranaceous, awned or not; petals slightly connate basally, white to deep purple; filaments adnate to base of corolla; anthers included; styles 5, free, hairy proximally; stigmas linear, papillate or smooth. Fruits dry, enclosed in persistent calyces, dehiscing transversely. x = 9.
Species ca. 50 (1 in the flora): North America, s South America, Europe, w Asia (n Siberia), n Africa.
Armeria is known to be taxonomically difficult. Species concepts vary among authors. About 50 species can be recognized according to A. R. Pinto da Silva (1972).
SELECTED REFERENCES
Bernis, F. 1952. Revisión del género Armeria Willd. con especial referencia a los grupos Ibéricos. Anales Inst. Bot. Cavanilles 11(2): 5-287. Lawrence, G. H. M. 1940. Armerias, native and cultivated. Gentes Herb. 4: 391-418. Lawrence, G. H. M. 1947. The genus Armeria in North America. Amer. Midl. Naturalist 37: 751-779. Lefèbvre, C. 1974. Population variation and taxonomy in Armeria maritima with special reference to heavy-metal tolerant populations. New Phytol. 73: 209-219. Lefèbvre, C. and X. Vekemans. 1995. A numerical taxonomic study of Armeria maritima (Plumbaginaceae) in North America and Greenland. Canad. J. Bot. 73: 1583-1595.
