The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.
, (1-) 5-40 cm. Stems  1, ± erect
, or 2-7[-10+], ± ascending
]. Leaves cauline [basal]; alternate; blades
lanceolate to oblanceolate
or ± round
]. Heads in (dense, spheric [hemispheric
of [2-]8-35+ in ± dichasiiform arrays [borne singly]. Involucres 0 or inconspicuous. Phyllaries usually 0, rarely 1-4, unequal (similar to paleae). Receptacles cylindric
[2-]5-15 times diams.), glabrous
paleae (except usually innermost) ± persistent
[falling], ± erect to ascending; bodies with 5+ nerves
(nerves ± parallel, obscure
), lanceolate to ovate
, open to ± folded (each at most enfolding, not enclosing a floret) ; wings
erect to recurved (apices acuminate to aristate
). Innermost paleae usually all pistillate, in some species bisexual
and pistillate, persistent or tardily falling, usually 5, erect to ascending [spreading
] (scarcely enlarged) in fruit, shorter than other pistillate paleae; bodies lanceolate to ovate. Pistillate florets [12-]27-40+. Functionally staminate
florets 0. Bisexual florets (1-) 2-9(-11) ; corolla lobes
4, ± equal. Cypselae brown, ± monomorphic
to ± compressed
, cylindric to ± obovoid
, usually straight, not gibbous
; corolla scars
]; pappi: outer pistillate 0, inner pistillate and bisexual of [3-]13-21 bristles
(visible in heads
). x = 14.
Species 12(-23) : introduced ; Europe, w Asia, n Africa, Atlantic Islands, introduced in North America, Australia.
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.
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Brongniart, 1843
- Takhtajan, 1967
- Takhtajan Ex Reveal, 1992
- Lindley, 1833
- Family: Compositae () - Giseke, 1792, nom. cons., nom. alt.
- Order: Asterales () - Lindley, 1833
- Superorder: Campanulanae () - Takhtajan Ex Reveal, 1992
- Subclass: Asteridae () - Takhtajan, 1967
- Class: Spermatopsida () - Brongniart, 1843
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Members of the genus Filago
ZipcodeZoo has pages for 5 species, subspecies, varieties, forms, and cultivars in this genus:
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- The natural history of plants, their forms, growth, reproduction, and distribution; Dublin, Blackie & son, limited, 1902. url .
- The natural history of plants; their forms, growth, reproduction, and distribution. From the German of Anton Kerner von Marilaun, by F.W. Oliver, with the assistance of Marian Busk and Mary F. Ewart. with about 2000 original woodcut illustrations and sixteen plates in colours. London, Blackie, 1896-1897. url p. 585, p. 948.
- Wagenitz, G. 1969. Abgrenzung und Gliederung der Gattung Filago L. s.l. (Compositae-Inuleae). Willdenowia 5: 395-444.
- Wagenitz, G. 1976. Two species of the "Filago germanica" group (Compositae-Inuleae) in the United States. Sida 6: 221-223.
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 11, 2012.
- Biodiversity Heritage Library NamebankID: 10532826
- Global Biodiversity Information Facility Taxonkey: 15136651
- Zipcode Zoo Species Identifier: 3066895