Overview
Annuals, (1-) 5-40 cm. Stems [0] 1, ± erect, or 2-7[-10+], ± ascending [prostrate]. Leaves cauline [basal]; alternate; blades lanceolate to oblanceolate [spatulate or ± round]. Heads in (dense, spheric [hemispheric]) glomerules 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 to clavate (heights [2-]5-15 times diams.), glabrous. Pistillate 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: terete to ± compressed, cylindric to ± obo void, usually straight, not gibbous, faces papillate to muricate [glabrous, smooth], dull; corolla scars apical [subapical]; 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.[1]
Taxonomy
The Genus Filago is further organized into finer groupings including:
- Species: ZipcodeZoo has pages for 103 species, subspecies, varieties, forms, and cultivars in the Genus Filago: F. abyssinica · F. acaulis · F. aegaea · F. aegaea aegaea · F. aegea · F. alpestris · F. anatolica · F. apiculata · F. arenaria · F. argentea · F. arizonica (Arizona Cottonrose) · F. arrensis · F. arvensis · F. asterisciflora · F. bianorii · F. bornmuelleri · F. california · F. californica (California Cottonrose) · F. candida · F. candolleana · F. canescens · F. carpetana · F. cephaloidea · F. clementei · F. congesta · F. contracta · F. cossyrensis · F. cretensis · F. crocidion · F. cuneata · F. cupaniana · F. dasycarpa · F. davisii · F. depressa (Dwarf Cottonrose) · F. desertorum · F. discolor · F. duriaei · F. eriocephala · F. eriosphaera · F. evaciformis · F. evacoides · F. exigua · F. faurei · F. filaginoides · F. filiformis · F. fuscescens · F. gallica · F. germanica · F. germanico · F. heterantha · F. hispanica · F. hurdwarica · F. huruarica · F. inexpectata · F. jussiaei · F. lagopus · F. lasiocarpa · F. leontopodioides · F. leontopodium · F. libyaca · F. lojaconoi · F. longilanata · F. lusitanica · F. lutescens · F. mareotica · F. maritima · F. mauritanica · F. micropodioides · F. minima · F. minor · F. mixta · F. montana · F. multicaulis · F. neglecta · F. nevadensis · F. nivea · F. numidica · F. obovata · F. palaestina · F. paniculata · F. paradoxa · F. perpusilla · F. petro-ianii · F. piramidata · F. polycephala · F. prolifera · F. prostrata · F. pygmaea · F. pyramidata (Broadleaf Cottonrose) · F. ramosissima · F. repens · F. rotundata · F. siria · F. spathulata · F. spathulata prolifera · F. stellata · F. supina · F. tenuifolia · F. texana · F. tyrrhenica · F. uliginosa · F. verna · F. vulgaris (Common Cottonrose)
Bibliography
- 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.
Footnotes
- James D. Morefield "Filago". in Flora of North America Vol. 19, 20 and 21 Page 26, 28, 385, 387, 444, 447, 448, 461. Oxford University Press. Online at EFloras.org.
Sources
- The distribution map on the Distribution tab comes from the Global Biodiversity Information Facility and is used with permission.
- Photographs on this page are copyrighted by individual photographers, and individual copyrights apply.
- The technology underlying this page, including the controls behind Keep Exploring, is owned by the BayScience Foundation. All rights are reserved.