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==Description== [[File:Creosote Bush Flower Stages.jpg|thumb|Stages of creosote flower development, from [[bud]] (left) to fruit and seeds (right)]] ''Larrea tridentata'' is an [[evergreen]] [[shrub]] growing to {{convert|1|to|3|m|ft|0|abbr=on}} tall, rarely {{convert|4|m|ft|abbr=on}}. The light gray stems of the plant bear resinous, dark green [[leaf|leaves]] with two [[Botany|opposite]] [[lanceolate]] leaflets joined at the base, with a deciduous [[awn (botany)|awn]] between them, each leaflet {{convert|7|to|18|mm|in|frac=16|abbr=on}} long and {{convert|4|to|8.5|mm|in|frac=32|abbr=on}} broad. The flowers are up to {{convert|25|mm|in|frac=8|abbr=on}} in diameter, with five yellow petals. The fruit is a brown-burgundy spherical, fuzzy capsule, which separates into five individual carpels each containing one seed.<ref>{{Cite web |title=Larrea tridentata (Chaparral, Creosote Bush, Greasewood) {{!}} North Carolina Extension Gardener Plant Toolbox |url=https://plants.ces.ncsu.edu/plants/larrea-tridentata/ |access-date=2024-01-13 |website=plants.ces.ncsu.edu}}</ref> [[Gall]]s may form by the activity of the [[creosote gall midge]]. The whole plant exhibits a characteristic odor of [[creosote]], from which the common name derives.<ref name=ucjeps>{{cite web | url = http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?Larrea%20tridentata | title = ''Larrea tridentata'' | work = The Jepson Manual | publisher = University of California | location = Berkeley, CA | access-date = 30 December 2011 }}</ref> In the regions where it grows, its smell is often associated with the "smell of rain", as the scent of its' resinous leaves intensifies in rain.<ref>{{cite news | url = https://www.azcentral.com/story/news/local/arizona-contributor/2017/02/07/what-smell-before-rains/97561218/ | title = What is that smell before it rains? | date = 2017-02-07 | access-date = 2018-04-05 | newspaper = The Arizona Republic }}</ref>
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