View source for Pilea

{{Treatment/ID
|accepted_name=Pilea
|accepted_authority=Lindley
|publications={{Treatment/Publication
|title=Coll. Bot., plate
|place=4 and text on facing page. 1821, name conserved
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Adicea
|authority=Rafinesque ex Britton & A. Brown
|rank=genus
}}
|hierarchy=Urticaceae;Pilea
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Urticaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pilea]]</div></div>
|etymology=Latin pileus, felt cap, because of the calyx covering the achene
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form;whole_organism duration;whole_organism duration;whole_organism pubescence;whole_organism growth form;whole_organism duration;whole_organism duration;whole_organism pubescence;whole_organism growth form"><b>Herbs,</b> shrubs, or subshrubs, annual or perennial, glabrous.</span> <span class="statement" id="st-d0_s1" data-properties="stem architecture;stem architecture;stem orientation;stem orientation;stem growth form"><b>Stems </b>simple or branched, erect, ascending, or repent.</span> <span class="statement" id="st-d0_s2" data-properties="leaf arrangement"><b>Leaves </b>opposite;</span> <span class="statement" id="st-d0_s3" data-properties="stipule presence">stipules present.</span> <span class="statement" id="st-d0_s4" data-properties="leaf-blade arrangement;leaf-blade variability;leaf-blade size;leaf-blade shape;margin architecture or shape;margin architecture or shape"><b>Leaf-</b>blades paired, equal or unequal, ovate, margins dentate or entire;</span> <span class="statement" id="st-d0_s5" data-properties="cystolith arrangement or course or shape;cystolith prominence">cystoliths linear, ± conspicuous.</span> <span class="statement" id="st-d0_s6" data-properties="inflorescence position;inflorescence architecture or arrangement"><b>Inflorescences </b>axillary, compact to lax cymes.</span> <span class="statement" id="st-d0_s7" data-properties="flower reproduction;flower architecture;flower architecture"><b>Flowers </b>unisexual, staminate and pistillate flowers in same cyme;</span> <span class="statement" id="st-d0_s8" data-properties="bract shape">bracts deltate to linear.</span> <span class="statement" id="st-d0_s9" data-properties="flower architecture;tepal quantity"><b>Staminate </b>flowers: tepals 4;</span> <span class="statement" id="st-d0_s10" data-properties="flower architecture;stamen quantity">stamens 4;</span> <span class="statement" id="st-d0_s11" data-properties="flower architecture;pistillode shape">pistillode conic.</span> <span class="statement" id="st-d0_s12" data-properties="flower architecture;tepal quantity;tepal variability;tepal variability;tepal quantity;tepal size;tepal shape"><b>Pistillate </b>flowers: tepals 3, equal or sometimes 1 tepal enlarged and hoodlike;</span> <span class="statement" id="st-d0_s13" data-properties="flower architecture;staminode quantity;tepal arrangement;achene life cycle">staminodes 3, opposite tepals, under tension and ejecting mature achene;</span> <span class="statement" id="st-d0_s14" data-properties="flower architecture;style duration;stigma arrangement or pubescence;stigma duration">style and tufted stigma deciduous.</span> <span class="statement" id="st-d0_s15" data-properties="tepal shape"><b>Achenes </b>sessile, laterally compressed, ovoid to teardrop-shaped, free from perianth at maturity, partly covered by hoodlike tepal.</span> <span class="statement" id="st-d0_s16" data-properties="achene architecture;achene shape;achene shape;achene fusion;x chromosome quantity;x chromosome quantity">x = 12, 13.</span><!--

-->{{Treatment/Body
|distribution=Mostly tropical and subtropical regions worldwide except Australia and New Zealand
|discussion=<p>Species ca. 400 (5 in the flora).</p><!--
--><p>Pilea should be further revised.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaf margins dentate; paired blades equal.
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Leaf margins entire; paired blades unequal.
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Achenes uniformly black except for very narrow, pale, marginal band, surface conspicuously pebbled with raised bosses.
|[[Pilea fontana|Pilea fontana]]
|-id=key-0-2
|2
|Achenes uniformly light colored or streaked with purple, surface smooth or purple striations sometimes slightly raised.
|[[Pilea pumila|Pilea pumila]]
|-id=key-0-3
|3
|Stems repent or prostrate.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Stems erect or diffusely ascending.
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Herbs; leaf blades spatulate to obovate.
|[[Pilea microphylla|Pilea microphylla]]
|-id=key-0-4
|4
|Shrubs or subshrubs; leaf blades of 2 types, obovate and orbiculate to orbiculate-cordate.
|[[Pilea trianthemoides|Pilea trianthemoides]]
|}
</div></div><!--

-->{{#Taxon:
name=Pilea
|authority=Lindley
|rank=genus
|parent rank=family
|synonyms=Adicea
|basionyms=
|family=Urticaceae
|distribution=Mostly tropical and subtropical regions worldwide except Australia and New Zealand
|reference=None
|publication title=Coll. Bot., plate
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V3/V3_1057.xml
|genus=Pilea
|achene architecture=sessile
|achene fusion=free
|achene life cycle=mature
|achene shape=ovoid;teardrop-shaped
|bract shape=deltate;linear
|cystolith arrangement or course or shape=linear
|cystolith prominence=conspicuous
|flower architecture=pistillate;pistillate;pistillate;staminate;staminate;staminate;pistillate;staminate
|flower reproduction=unisexual
|inflorescence architecture or arrangement=compact;lax
|inflorescence position=axillary
|leaf arrangement=opposite
|leaf-blade arrangement=paired
|leaf-blade shape=ovate
|leaf-blade size=unequal
|leaf-blade variability=equal
|margin architecture or shape=entire;dentate
|pistillode shape=conic
|stamen quantity=4
|staminode quantity=3
|stem architecture=branched;simple
|stem growth form=repent
|stem orientation=ascending;erect
|stigma arrangement or pubescence=tufted
|stigma duration=deciduous
|stipule presence=absent
|style duration=deciduous
|tepal arrangement=opposite
|tepal quantity=1;3;4
|tepal shape=hoodlike;hoodlike
|tepal size=enlarged
|tepal variability=sometimes;equal
|whole_organism duration=perennial;annual;perennial;annual
|whole_organism growth form=subshrub;shrub;herb
|whole_organism pubescence=glabrous;glabrous
|x chromosome quantity=13;12
}}<!--

-->[[Category:Treatment]][[Category:Urticaceae]]