Biology
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Narrow-leaved cudweed tends to occur as a summer annual in the UK, but seeds can generally germinate at any time of the year, so it may occasionally occur as a winter annual. The flowers are thought to self-pollinate, and there have been no records of insects visiting the flowers (2). A seed bank can lie dormant until conditions become suitable for the plant to germinate (1). Although thought to be an introduced species in Britain for many years, recent work suggests that it is actually a native species (2).
Conservation
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In 1994 it was discovered that there was a source of native narrow-leaved cudweed in cultivation. A re-introduction programme was established by Plantlife, the wild plant conservation charity, and by 1998 the species had become established at the last known British site (2). A Biodiversity Action Plan has been formulated by Plantlife, and seed has been collected for the Millennium Seed Bank at Royal Botanic Gardens, Kew (2).
Description
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Narrow-leaved cudweed produces tiny flowers (2) and has small, narrow, silvery-grey to green leaves. The seeds are known as achenes, which are single seeded fruits that separate from the plant in one piece (3). Two types of achene are produced, the first type is shed in the bracts, and the second type is blown away in the wind (2). The common name of the cudweeds arises from the practice dating from the 1600s of placing these plants in the mouth of cows that had 'lost their cud' (4).
Habitat
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Inhabits open sites that are subject to disturbance, including arable field margins (1), gravel pits, heathland and sandy open ground (2).
Range
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In the UK this species reaches the northern extreme of its range (2). It is restricted to the south-east of England and Sark in the Channel Islands, and has always been rare (1). During the last 100 years this plant has suffered a serious decline (2), and was thought to be extinct on mainland Britain by 1955 (2). Elsewhere it occurs mainly in south and west Europe and North Africa (2) and is threatened in Eastern Europe (1).
Status
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Classified as Critically Endangered in Great Britain (1).
Threats
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Narrow-leaved cudweed has declined because of changes in agriculture, and the rabbit population crash after the introduction of myxomatosis, which led to a decrease in the level of disturbance (1). At one Essex site the cessation of military activity after the war is thought to have resulted in the loss of the species following scrub invasion and dense growth of grasses (2). Rubbish dumping and scrub invasion are currently the main threats on Sark (2).
Associations
provided by BioImages, the virtual fieldguide, UK
Foodplant / internal feeder
larva of Dioxyna bidentis feeds within capitulum of Filago gallica
Remarks: Other: uncertain
Logfia gallica
provided by wikipedia EN
Logfia gallica, (syn: Filago gallica), is a species of herbaceous plant. Its common names are narrowleaf cottonrose and daggerleaf cottonrose. It is in the tribe Gnaphalieae of the family Asteraceae.
The species has relatively long and stiff awl-shaped leaves.
Distribution
Logfia gallica is native to the Mediterranean region, in Eurasia, North Africa, and Western Asia.[1][2]
It is widely introduced species, that has naturalized in western North America — from southwestern Oregon, throughout California including the Channel Islands, to northwestern Baja California, Mexico.[2][3] The first known American collection was from Newcastle, California circa 1883. It had subsequently been collected throughout central California by 1935, and had spread to most of its present North American range by 1970.[1]
Elsewhere, it is also naturalized in South America, Hawaii, and Australia.
References
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Logfia gallica: Brief Summary
provided by wikipedia EN
Logfia gallica, (syn: Filago gallica), is a species of herbaceous plant. Its common names are narrowleaf cottonrose and daggerleaf cottonrose. It is in the tribe Gnaphalieae of the family Asteraceae.
The species has relatively long and stiff awl-shaped leaves.
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- cc-by-sa-3.0
- copyright
- Wikipedia authors and editors
