| 词条 | Ruellia noctiflora |
| 释义 |
|image = |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Lamiales |familia = Acanthaceae |genus = Ruellia |species = R. noctiflora |binomial = Ruellia noctiflora |binomial_authority = (Gray) Nees |status = G2 |status_system = TNC |synonyms = Ruellia tubiflora |}} Ruellia noctiflora, the nightflowering wild petunia,[1] is a herbaceous perennial found along the Gulf coast. Both its specific and common names derive from its habit of nocturnal flowering. In spite of the common name it is in a different family from the garden petunia. It is considered endangered in Florida.[1] DescriptionThe plant grows to {{convert|16|in|cm|abbr=on}}[2] with oval, pointed, usually stalkless leaves up to {{convert|2.8|in|cm|abbr=on}} long borne in pairs on thin, hairy, purplish stems. It bears white, trumpet-shaped, five-petalled flowers {{convert|3|in|cm|abbr=on}} long and {{convert|4|in|cm|abbr=on}} across; these open at night and fall by mid-morning, and are pollinated by hawk moths, whose long proboscises allow them to reach the nectar held at the base of the flower.[2] The resulting fruit is a capsule {{convert|.8|in|cm|abbr=on}} long with the long style retained, resting among the five long spikey sepals. When ripe it splits in half longitudinally, discharging the seed. Unusually for the genus no cleistogamous flowers are formed.[3] HabitatR. noctiflora is generally a wetlands plant and prefers longleaf pine savanna. The principal threats to it (besides outright habitat destruction) are suppression of the fires needed to clear out the understory, and competition from invasive species, particularly cogon grass.[4]Hybridization studies with other North American Ruellia species suggest a close relationship with Ruellia caroliniensis, which grows across the United States southeast.[5] References1. ^1 {{PLANTS|id=RUNO|taxon=Ruellia noctiflora|accessdate=2016-02-16}} {{Taxonbar|from=Q15357072}}2. ^1 {{cite book|title=Field Guide to the Rare Plants of Georgia|first=Linda G.|last=Chafin|publisher=University of Georgia Press|pages=313–314|location=Athens, Georgia|year=2007}} 3. ^{{cite web|url=http://explorer.natureserve.org/servlet/NatureServe?sourceTemplate=tabular_report.wmt&loadTemplate=species_RptComprehensive.wmt&selectedReport=RptComprehensive.wmt&summaryView=tabular_report.wmt&elKey=141829&paging=home&save=true&startIndex=1&nextStartIndex=1&reset=false&offPageSelectedElKey=141829&offPageSelectedElType=species&offPageYesNo=true&post_processes=&radiobutton=radiobutton&selectedIndexes=141829|publisher=NatureServe|title=Ruellia noctiflora|website=NatureServe Explorer|accessdate=2016-02-27}} 4. ^{{cite web|url=http://www.wlf.louisiana.gov/sites/default/files/pdf/fact_sheet_plant/31769-Ruellia%20noctiflora/ruellia_noctoflora.pdf|title=Rare Plants of Louisiana: Ruellia noctiflora|publisher=Louisiana Department of Wildlife and Fisheries}} 5. ^{{cite journal|title=Genetic and Morphological Relationships of the Southeastern Coastal Plain Endemic Ruellia noctiflora (Acanthaceae)|first=Robert W.|last=Long|journal=Bulletin of the Torrey Botanical Club|volume=98|number=1|date=Jan–Feb 1971|pages=16–21}} 2 : Ruellia|Flora of the Southeastern United States |
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