Sp. Pl.2: 927, 1199. 1753
Gen. Pl. ed.5, 397. 1754
Introduced; Europe, w Asia, n Africa, Atlantic Islands, introduced in North America, Australia.
Species 12(–23) (2 in the flora).
See discussion of Filagininae following the tribal description (p. 385).
The name Filago has been used also for the genus now usually recognized as Evax Gaertner. Here Filago, in the narrow sense, contains twelve Old World species. Six species long included in Filago in North America are here separated as Logfia.
Filago species grow in open, dry or somewhat moist habitats of arid, semiarid, Mediterranean, and humid-temperate to subtropical climates. The species in the flora grow in disturbed habitats; neither appears to be aggressively weedy.
Filago appears to be sister to or derived from Logfia and is probably ancestral to Evacopsis and Evax (J. D. Morefield 1992). Filago is most easily recognized by outer epappose florets subtended by open or ± folded, persistent, acuminate to aristate paleae, and prominent pappi on inner pistillate and bisexual florets.
|1||Largest leaves oblong to lanceolate, widest in proximal 2/3; heads in glomerules of (15–)20–35+, narrowly ± ampulliform, largest 1.5–2 mm diam.; pistillate paleae spirally ranked, longest 3.5–4.2 mm, innermost surrounding 14–25+ florets (10–20+ pistillate); longest dis- tal capitular leaves 0.8–1.1 times head heights, acute||Filago vulgaris|
|1||Largest leaves oblanceolate to narrowly spatulate, widest in distal 1/3; heads in glomerules of mostly (8–)12–16(–20), ± bipyramidal, largest 2.5–4 mm diam.; pistillate paleae vertically ranked, longest 4.5–6 mm, innermost surrounding 8–13 florets (2–7 pistillate); longest dis- tal capitular leaves 1.3–2 times head heights, obtuse||Filago pyramidata|
|Author||James D. Morefield +|
|Common name||Herba impia +, cotonnière + and cottonrose +|
|Etymology||Latin filum, thread, and - ago, possessing or resembling, alluding to abundant cottony indument +|
|Illustrator||Linny Heagy +|
|Reference||wagenitz1969a + and wagenitz1976b +|
|Taxon name||Filago +|
|Taxon parent||Asteraceae tribe Gnaphalieae +|
|Taxon rank||genus +|
|Volume||Volume 19 +|