Yorkshire Fog

Yorkshire Fog

Taxobox
name = Yorkshire Fog


image_width = 204px
image_caption = Habitus
regnum = Plantae
divisio = Magnoliophyta
classis = Liliopsida
ordo = Poales
familia = Poaceae
genus = "Holcus"
species = "H. lanatus"
binomial = "Holcus lanatus"
binomial_authority = L.

Yorkshire Fog ("Holcus lanatus") is a grass. It is a common weed in crops and is a hardy pasture grass. It is native to Europe.

Yorkshire fog has velvety grey-green leaves which gives its common name (perhaps alluding to the fogs of Yorkshire). The shoots are round. The base of the shoots are white with pink stripes or veins - these are used in identification and are known by certain ecologists as 'stripey pyjamas'. The inflorescence is robust and often tinged purple. Yorkshire fog produces a large amount of seed and is a rapid coloniser of disturbed ground. It prefers wetter ground, often seen around drainage ditches.

In a survey of weed seed contamination in cereal seed in 1970, it was found in 1% of samples. All of this was home saved seed. It is a significant pest weed in Australia, as it is a winter growing grass (C3 carbon fixation) and survives droughts and hot summers as seed. It is distasteful to stock unless young and not much else is available.

Yorkshire fog is an indicator of poor soil, too low stocking or poor drainage. It can be controlled by increasing available potassium and phosphorus, increasing stocking rate and improved drainage.

Yorkshire fog in its natural habitat is a food source for the Speckled Wood, Wall and especially Small Skipper butterflies. It is rarely utilized by the Essex Skipper.

Gallery

References

* http://www.hdra.org.uk/organicweeds/weed_information/weed.php?id=81
* Grasses of temperate Australia, Lamp, Forbes and Cade. First published 1990, Bloomings Books. ISBN 0-646-41189-6


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  • Yorkshire fog — /jɔkʃə ˈfɒg/ (say yawkshuh fog) noun a widespread, tufted perennial grass, Holcus lanatus; softgrass. {from Yorkshire} …  

  • Yorkshire fog — noun a common pasture grass with soft downy leaves. [Holcus lanatus.] Origin C19: fog from fog2 …   English new terms dictionary

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