View source for Causonis

{{Treatment/ID
|accepted_name=Causonis
|accepted_authority=Rafinesque
|publications={{Treatment/Publication
|title=Med. Fl.
|place=2: 122. 1830
|year=1830
}}
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}
|basionyms=
|synonyms=
|hierarchy=Vitaceae;Causonis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Vitaceae]]</div><div class="higher-taxon"><small>genus</small>[[Causonis]]</div></div>
|etymology=Derivation unknown; perhaps Latin causa, reason, and onus, necessity, alluding to segregation from Cissus
|volume=Volume 12
|mention_page=page 4
|treatment_page=page 22
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form;whole_organism reproduction;whole_organism reproduction;whole_organism growth form"><b>Vines </b>[lianas], sprawling to moderately high climbing, synoecious or polygamomonoecious.</span> <span class="statement" id="st-d0_s1" data-properties="bark fusion"><b>Branches:</b> bark adherent;</span> <span class="statement" id="st-d0_s2" data-properties="pith coloration;pith architecture">pith white, continuous through nodes;</span> <span class="statement" id="st-d0_s3" data-properties="tendril architecture">tendrils usually 2–3 [–5] -branched, without [with] adhesive discs.</span> <span class="statement" id="st-d0_s4" data-properties="leaf architecture"><b>Leaves </b>palmately (pedately) compound.</span> <span class="statement" id="st-d0_s5" data-properties="inflorescence reproduction;inflorescence position;cyme shape;cyme architecture"><b>Inflorescences </b>usually bisexual, axillary, corymblike cymes, compound.</span> <span class="statement" id="st-d0_s6" data-properties="flower reproduction;flower reproduction"><b>Flowers </b>bisexual or unisexual;</span> <span class="statement" id="st-d0_s7" data-properties="calyx shape;calyx shape">calyx cupshaped, indistinctly 4-lobed;</span> <span class="statement" id="st-d0_s8" data-properties="petal quantity;petal fusion">petals 4, distinct;</span> <span class="statement" id="st-d0_s9" data-properties="nectary fusion;nectary shape;nectary shape">nectary adnate to base of ovary, cupshaped, 4-lobed;</span> <span class="statement" id="st-d0_s10" data-properties="stamen quantity">stamens 4;</span> <span class="statement" id="st-d0_s11" data-properties="style shape;style height or length or size">style conic, short.</span> <span class="statement" id="st-d0_s12" data-properties="berry coloration"><b>Berries </b>dark blue to black.</span> <span class="statement" id="st-d0_s13" data-properties=""><b>Seeds </b>2–4 per fruit.</span> <span class="statement" id="st-d0_s14" data-properties="seed quantity;x chromosome quantity">x = 10.</span><!--

-->{{Treatment/Body
|distribution=e;se Asia;Australia
|introduced=true
|discussion=<p>Species ca. 25 (1 in the flora).</p><!--
--><p>Causonis is separated from Cayratia (Wen J. et al. 2013) based on phylogenetic evidence (Wen et al. 2007; Lu L. M. et al. 2013). It corresponds to the Asian and Australian Cayratia sect. Discypharia Suessenguth (K. Suessenguth 1953; A. Latiff 1981). Causonis trifolia (Linnaeus) Rafinesque, native to southeast Asia and Australia, is an aggressive weed at Fairchild Tropical Garden in Miami, Florida. No other locations are known for this species in the flora area, but it may become naturalized in southern Florida. It can be distinguished from C. japonica by having 3-foliolate leaves and tendrils that are 3–5-branched and usually have adhesive discs at their tips.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Causonis
|authority=Rafinesque
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Vitaceae
|distribution=e;se Asia;Australia
|introduced=true
|reference=None
|publication title=Med. Fl.
|publication year=1830
|special status=Introduced
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V12/V12_123.xml
|genus=Causonis
|bark fusion=adherent
|berry coloration=dark blue;black
|calyx shape=4-lobed;cup-shaped
|cyme architecture=compound
|cyme shape=corymblike
|flower reproduction=unisexual;bisexual
|inflorescence position=axillary
|inflorescence reproduction=bisexual
|leaf architecture=compound
|nectary fusion=adnate
|nectary shape=4-lobed;cup-shaped
|petal fusion=distinct
|petal quantity=4
|pith architecture=continuous
|pith coloration=white
|seed quantity=2;4
|stamen quantity=4
|style height or length or size=short
|style shape=conic
|tendril architecture=2-3[-5]-branched
|whole_organism growth form=vine;sprawling;moderately high climbing
|whole_organism reproduction=polygamomonoecious;synoecious
|x chromosome quantity=10
}}<!--

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