View source for Purshia

{{Treatment/ID
|accepted_name=Purshia
|accepted_authority=de Candolle ex Poiret in J. Lamarck et al.
|publications={{Treatment/Publication
|title=in J. Lamarck et al., Encycl., Suppl.
|place=4: 623. 1816
|year=1816
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Cowania
|authority=D. Don
|rank=genus
}}
|hierarchy=Rosaceae;Rosaceae subfam. Dryadoideae;Rosaceae tribe Dryadeae;Purshia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Dryadoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Dryadeae]]</div><div class="higher-taxon"><small>genus</small>[[Purshia]]</div></div>
|etymology=For Frederick Traugott Pursh, 1774 – 1820, German botanist, student of North American flora
|volume=Volume 9
|mention_page=page 326, 327, 343
|treatment_page=page 339
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism some measurement;whole_organism growth form"><b>Shrubs,</b> 2–75 dm.</span> <span class="statement" id="st-d0_s1" data-properties="stem quantity;stem architecture"><b>Stems </b>3–20+, branched;</span> <span class="statement" id="st-d0_s2" data-properties="bark coloration;bark condition;bark coloration;sheet width;sheet texture">bark cinnamon brown, weathering gray, in thin papery sheets;</span> <span class="statement" id="st-d0_s3" data-properties="short-shoot presence">short-shoots present.</span> <span class="statement" id="st-d0_s4" data-properties="leaf duration;leaf duration;leaf life cycle;leaf position or shape;leaf arrangement;leaf architecture"><b>Leaves </b>persistent or drought-deciduous, abscising distal to bases, crowded on short-shoot spurs, simple;</span> <span class="statement" id="st-d0_s5" data-properties="stipule duration;stipule shape;margin architecture or shape">stipules persistent, deltate, margins entire;</span> <span class="statement" id="st-d0_s6" data-properties="petiole presence;petiole presence">petiole usually absent, sometimes present;</span> <span class="statement" id="st-d0_s7" data-properties="blade shape;blade atypical some measurement;blade some measurement;blade texture;blade width;margin shape;margin shape;abaxial surface pubescence;adaxial surface pubescence;adaxial surface pubescence">blade linear or ovate to obovate, 0.3–1.5 (–1.9) cm, coriaceous, sometimes thin, margins revolute, entire or toothed to lobed, abaxial surface usually densely hairy, adaxial glabrous or sparsely hairy.</span> <span class="statement" id="st-d0_s8" data-properties="inflorescence position or structure subtype;flower architecture or arrangement or growth form"><b>Inflorescences </b>terminal on short-shoots, flowers solitary;</span> <span class="statement" id="st-d0_s9" data-properties="leaf life cycle">bracts present resembling immature leaves;</span> <span class="statement" id="st-d0_s10" data-properties="bracteole presence">bracteoles absent.</span> <span class="statement" id="st-d0_s11" data-properties="pedicel presence"><b>Pedicels </b>present.</span> <span class="statement" id="st-d0_s12" data-properties="flower diameter;flower diameter"><b>Flowers </b>10–15 (–25) mm diam.;</span> <span class="statement" id="st-d0_s13" data-properties="hypanthium shape;hypanthium shape;hypanthium some measurement;exterior pubescence;exterior pubescence;exterior pubescence;exterior position;exterior pubescence;exterior function">hypanthium obconic, sometimes hemispheric in fruit, 2.5–6.5 mm, exterior villous, stipitate-glandular or not, interior glabrous, nectariferous;</span> <span class="statement" id="st-d0_s14" data-properties="sepal quantity;sepal orientation;sepal shape;abaxial surface pubescence">sepals 5, spreading-reflexed, ovate to oblong-ovate, abaxial surface pubescent-villous;</span> <span class="statement" id="st-d0_s15" data-properties="petal quantity;petal duration;petal coloration;petal coloration;petal coloration;petal coloration;petal coloration;petal shape;base shape;apex orientation;apex shape">petals 5, caducous, white, cream-yellow, or yellow [rose red], broadly obovate or obovate-spatulate to spatulate, base cuneate to clawed, apex spreading, rounded to emarginate;</span> <span class="statement" id="st-d0_s16" data-properties="stamen atypical quantity;stamen atypical quantity;stamen quantity;stamen height or length or size">stamens (17–) 20–80 (–125), shorter than petals;</span> <span class="statement" id="st-d0_s17" data-properties="torus presence">torus absent;</span> <span class="statement" id="st-d0_s18" data-properties="carpel atypical quantity;carpel quantity;carpel architecture;stigma position or structure subtype">carpels 1–15 (–31), stipitate, stigmas terminal.</span> <span class="statement" id="st-d0_s19" data-properties="fruits achene quantity;fruits achene shape;fruits achene shape;fruits achene some measurement;fruits achene texture"><b>Fruits </b>achenes, 1, obovoid-fusiform or oblanceoloid, 4–12 mm, leathery;</span> <span class="statement" id="st-d0_s20" data-properties="hypanthium duration">hypanthium persistent;</span> <span class="statement" id="st-d0_s21" data-properties="">sepals persistent, spreading-reflexing.</span> <span class="statement" id="st-d0_s22" data-properties="sepal duration;sepal orientation;x chromosome quantity">x = 9.</span><!--

-->{{Treatment/Body
|distribution=sw United States;n Mexico
|discussion=<p>Species 6 (4 in the flora).</p><!--
--><p>This treatment combines Cowania (with 3–31 carpels that develop into wind-dispersed achenes with plumose awns) with Purshia (with 1–3 carpels that form into larger, leathery achenes with persistent style bases that are often dispersed by rodents that cache the fruits for later use). This is supported by the presence of intergeneric hybrids, by the similar vegetative and floral morphologies, except for carpel number and means of fruit dispersal, and by molecular data. The roots are often associated with the nitrogen-fixing actinomycete Frankia. Some species are important browse for ungulates.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Carpels 1 or 2; achenes broadly obovoid-fusiform, 3.5–5.2 mm diam., persistent style 5–7(–10) mm, densely hirtellous.
|[[Purshia tridentata|Purshia tridentata]]
|-id=key-0-1
|1
|Carpels (2–)5–15(–31); achenes oblanceoloid, 1.1–2.5 mm diam., persistent style (15–)20–59 mm, plumose
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Leaf blades oblong to spatulate, margins irregularly lobed, lobes (3–)5(–7).
|[[Purshia stansburyana|Purshia stansburyana]]
|-id=key-0-2
|2
|Leaf blades linear to oblanceolate or linear-subulate, margins entire or with 1–2 teeth or lobes
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Leaf blades: margins revolute (not obscuring abaxial surfaces), entire or with 1–2 teeth or lobes; petals light yellowish cream; stamens (28–)34–54; carpels (2–)4–5(–6).
|[[Purshia subintegra|Purshia subintegra]]
|-id=key-0-3
|3
|Leaf blades: margins strongly revolute (nearly obscuring abaxial surfaces), entire; petals white or suffused with red; stamens (60–)80–120; carpels (12–)17–31.
|[[Purshia ericifolia|Purshia ericifolia]]
|}
</div></div><!--

-->{{#Taxon:
name=Purshia
|author=James Henrickson
|authority=de Candolle ex Poiret in J. Lamarck et al.
|rank=genus
|parent rank=tribe
|synonyms=Cowania
|basionyms=
|family=Rosaceae
|distribution=sw United States;n Mexico
|reference=None
|publication title=in J. Lamarck et al., Encycl., Suppl.
|publication year=1816
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V9/V9_556.xml
|subfamily=Rosaceae subfam. Dryadoideae
|tribe=Rosaceae tribe Dryadeae
|genus=Purshia
|abaxial surface pubescence=pubescent-villous;hairy
|adaxial surface pubescence=hairy;glabrous
|apex orientation=spreading
|apex shape=rounded;emarginate
|bark coloration=gray;cinnamon brown
|bark condition=weathering
|base shape=cuneate;clawed
|blade atypical some measurement=1.5cm;1.9cm
|blade shape=ovate;obovate
|blade some measurement=0.3cm;1.5cm
|blade texture=coriaceous
|blade width=thin
|bracteole presence=absent
|carpel architecture=stipitate
|carpel atypical quantity=15;31
|carpel quantity=1;15
|exterior function=nectariferous
|exterior position=interior
|exterior pubescence=glabrous;not;stipitate-glandular;villous
|flower architecture or arrangement or growth form=solitary
|flower diameter=10mm;15mm
|fruits achene quantity=1
|fruits achene shape=oblanceoloid;obovoid-fusiform
|fruits achene some measurement=4mm;12mm
|fruits achene texture=leathery
|hypanthium duration=persistent
|hypanthium shape=hemispheric;obconic
|hypanthium some measurement=2.5mm;6.5mm
|inflorescence position or structure subtype=terminal
|leaf architecture=simple
|leaf arrangement=crowded
|leaf duration=drought-deciduous;persistent
|leaf life cycle=immature;abscising
|leaf position or shape=distal
|margin architecture or shape=entire
|margin shape=toothed;lobed
|pedicel presence=absent
|petal coloration=yellow;cream-yellow;yellow;cream-yellow;white
|petal duration=caducous
|petal quantity=5
|petal shape=obovate-spatulate;spatulate
|petiole presence=absent;absent
|sepal duration=persistent
|sepal orientation=spreading-reflexing;spreading-reflexed
|sepal quantity=5
|sepal shape=ovate;oblong-ovate
|sheet texture=papery
|sheet width=thin
|short-shoot presence=absent
|stamen atypical quantity=80;125
|stamen height or length or size=shorter
|stamen quantity=20;80
|stem architecture=branched
|stem quantity=3;20
|stigma position or structure subtype=terminal
|stipule duration=persistent
|stipule shape=deltate
|torus presence=absent
|whole_organism growth form=shrub
|whole_organism some measurement=2dm;75dm
|x chromosome quantity=9
}}<!--

-->[[Category:Treatment]][[Category:Rosaceae tribe Dryadeae]]