| 词条 | Caladenia praecox |
| 释义 |
| name = Early caladenia | image = Caladenia dimorpha (24904531771).jpg | image_caption = Caladenia praecox growing near Clonbinane | status_system = | status = | genus = Caladenia | species = praecox | authority = Nicholls[1] | synonyms_ref = [1] | synonyms =
}} Caladenia praecox, commonly known as early caladenia[3] or early caps[4] is a plant in the orchid family Orchidaceae and is endemic to south-eastern Australia. It is a ground orchid with a single leaf and up to four white flowers which are often tinged with green or pink. DescriptionCaladenia praecox is a terrestrial, perennial, deciduous, herb with an underground tuber and a single leaf, {{convert|60-120|mm|in|sigfig=1|abbr=on}} long and {{convert|2-3|mm|in|sigfig=1|abbr=on}} wide. Up to four white flowers which are often tinged with green or pink, are borne on a spike {{convert|60-130|mm|in|sigfig=1|abbr=on}} tall. The backs of the sepals and petals have dark red glandular hairs. The dorsal sepal is {{convert|9-12|mm|in|sigfig=1|abbr=on}} long, {{convert|3-4|mm|in|sigfig=1|abbr=on}} wide and curves forward, forming a hood over the column. The lateral sepals are {{convert|11-15|mm|in|sigfig=1|abbr=on}} long and {{convert|3-5|mm|in|sigfig=1|abbr=on}} wide and spread apart. The petals are {{convert|9-12|mm|in|sigfig=1|abbr=on}} long, about {{convert|3|mm|in|sigfig=1|abbr=on}} wide and spread widely. The labellum is white, often with red marks and is {{convert|6-7|mm|in|sigfig=1|abbr=on}} long and {{convert|4-6|mm|in|sigfig=2|abbr=on}} wide. The sides of the labellum turn upwards and have stalked teeth and the tip is curled under. There are four or six rows of crowded calli in the mid-line of the labellum. Flowering occurs from August and October.[1][2][3]Taxonomy and namingCaladenia praecox was first formally described in 1926 by William Nicholls and the description was published in The Victorian Naturalist.[4][5] The specific epithet (praecox) is a Latin word meaning "too early ripe" or "precocious".[6] Although recognised by the Royal Botanic Gardens, Melbourne as a valid name, C. praecox is regarded as a synonym of Caladenia dimorpha by the Royal Botanic Gardens, Kew.[7]Distribution and habitatCaladenia praecox is widespread in Victoria especially in the Victorian goldfields and is often recorded from areas to the north-east of Melbourne, growing in open forest and woodland. In also occurs in the south-east of New South Wales.[1][2][8]ConservationCaladenia praecox is not listed under the Victorian Flora and Fauna Guarantee Act 1988.[2]References1. ^1 2 {{cite book|last1=Jones|first1=David L.|title=A complete guide to native orchids of Australia including the island territories|date=2006|publisher=New Holland|location=Frenchs Forest, N.S.W.|isbn=1877069124|pages =47–48}} {{Taxonbar|from=Q29026570}}2. ^1 2 3 {{cite web|last1=Jeanes|first1=Jeffrey|title=Caladenia praecox|url=https://vicflora.rbg.vic.gov.au/flora/taxon/3e91ab23-8cba-4edc-aab2-4a729f5d1c6d|publisher=Royal Botanic Gardens Victoria: Vicflora|accessdate=7 March 2017}} 3. ^{{cite web|title=Caladenia praecox|url=http://fe.yarraranges.vic.gov.au/Residents/Trees_Vegetation/Yarra_Ranges_Plant_Directory/Yarra_Ranges_Local_Plant_Directory/Lower_Storey/Orchids/Caladenia_praecox|publisher=Yarra Ranges Shire Council|accessdate=7 March 2017}} 4. ^1 2 {{cite web|title=Caladenia praecox|url= https://id.biodiversity.org.au/instance/apni/514731|accessdate=7 March 2017}} 5. ^{{cite journal|last1=Nicholls|first1=William Henry|title=A New Victorian Orchid|journal=The Victorian Naturalist|date=1926|volume=43|pages=156–158|url=https://www.biodiversitylibrary.org/item/124680#page/164/mode/1up|accessdate=7 March 2017}} 6. ^{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page=662}} 7. ^{{WCSP | 28678 | Caladenia praecox}} 8. ^{{cite web|title=Caladenia praecox|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Caladenia~praecox|publisher=Royal Botanic Gardens, Sydney:plantnet|accessdate=7 March 2017}} 5 : Caladenia|Plants described in 1926|Endemic orchids of Australia|Orchids of Victoria (Australia)|Orchids of New South Wales |
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