View source for Psilactis gentryi

{{Treatment/ID
|accepted_name=Psilactis gentryi
|accepted_authority=(Standley) D. R. Morgan
|publications={{Treatment/Publication
|title=Syst. Bot.
|place=18: 302. 1993
|year=1993
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster gentryi
|authority=Standley
|rank=species
|publication_title=Publ. Field Mus. Nat. Hist., Bot. Ser.
|publication_place=22: 60. 1940
}}
|synonyms={{Treatment/ID/Synonym
|name=Machaeranthera gentryi
|authority=(Standley) R. C. Jackson ex B. L. Turner
|rank=species
}} {{Treatment/ID/Synonym
|name=Machaeranthera mexicana
|authority=B. L. Turner & D. B. Horne
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Psilactis;Psilactis gentryi
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Psilactis]]</div><div class="higher-taxon"><small>species</small>[[Psilactis gentryi]]</div></div>
|volume=Volume 20
|mention_page=page 462, 464
|treatment_page=page 463
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism some measurement;whole-organism duration"><b>Annuals,</b> 20–120 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem fixation or orientation;stem pubescence;stem pubescence;branch fixation or orientation;branch pubescence;branch pubescence"><b>Stems </b>and branches often sparsely appressed or erect-hairy, stipitate-glandular, more densely distally.</span> <span class="statement" id="st-d0_s2" data-properties="distal leaf-blade shape;distal leaf-blade size;distal leaf-blade length;distal leaf-blade width;base shape;base architecture or fixation"><b>Distal </b>leaf-blades ovate to lanceolate, smallest 5–12 × 2–6 mm, bases cordate to auriculate, clasping.</span> <span class="statement" id="st-d0_s3" data-properties="involucre shape;involucre some measurement"><b>Involucres </b>hemispheric, 5–8 mm.</span> <span class="statement" id="st-d0_s4" data-properties="phyllarie shape;phyllarie variability;phyllarie size;phyllarie length;phyllarie width"><b>Phyllaries </b>lanceolate to linear-lanceolate, equal or slightly unequal, 4–7 × 0.7–1.2 mm;</span> <span class="statement" id="st-d0_s5" data-properties="outer phyllarie growth form or texture;margin texture;margin presence;margin prominence">outer often mostly herbaceous (bases inconspicuously indurate), scarious margins absent or obscured by stipitate-glands;</span> <span class="statement" id="st-d0_s6" data-properties="base texture;margin texture">inner: bases indurate, margins scarious.</span> <span class="statement" id="st-d0_s7" data-properties="receptacle shape;receptacle diameter"><b>Receptacles </b>flat to convex, 4–6 mm diam.</span> <span class="statement" id="st-d0_s8" data-properties="ray-floret quantity"><b>Ray-</b>florets 30–70;</span> <span class="statement" id="st-d0_s9" data-properties="lamina length;lamina width">laminae 7–14 × 1–1.5 mm.</span> <span class="statement" id="st-d0_s10" data-properties="disc-floret quantity"><b>Disc-</b>florets 50–150;</span> <span class="statement" id="st-d0_s11" data-properties="corolla some measurement">corollas 2.5–4.5 mm.</span> <span class="statement" id="st-d0_s12" data-properties="ray cypsela some measurement;ray cypsela pubescence"><b>Ray </b>cypselae 1.2–2 mm, sparsely to densely appressed-hairy.</span> <span class="statement" id="st-d0_s13" data-properties="disc cypsela some measurement;disc cypsela pubescence"><b>Disc </b>cypselae 1.2–2.5 mm, sparsely to densely appressed-hairy;</span> <span class="statement" id="st-d0_s14" data-properties="pappus bristle some measurement;pappus bristle some measurement;2n chromosome quantity">pappus bristles 40–50, 2.5–4 mm. <b>2n</b> = 8 (Mexico).</span><!--

-->{{Treatment/Body
|phenology=Flowering Sep–Nov.
|habitat=Canyon bottoms, along rocky streambeds
|elevation=1700–2300 m
|distribution=Ariz.;Mexico (Chihuahua);Mexico (Durango);Mexico (Hidalgo);Mexico (Mexico);Mexico (Sonora)
|discussion=<p>Psilactis gentryi occurs in the Huachuca Mountains of southeastern Arizona.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Psilactis gentryi
|authority=(Standley) D. R. Morgan
|rank=species
|parent rank=genus
|synonyms=Machaeranthera gentryi;Machaeranthera mexicana
|basionyms=Aster gentryi
|family=Asteraceae
|phenology=Flowering Sep–Nov.
|habitat=Canyon bottoms, along rocky streambeds
|elevation=1700–2300 m
|distribution=Ariz.;Mexico (Chihuahua);Mexico (Durango);Mexico (Hidalgo);Mexico (Mexico);Mexico (Sonora)
|reference=None
|publication title=Syst. Bot.
|publication year=1993
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20_1071.xml
|tribe=Asteraceae tribe Astereae
|genus=Psilactis
|species=Psilactis gentryi
|2n chromosome quantity=8
|base architecture or fixation=clasping
|base shape=cordate;auriculate
|base texture=indurate
|branch fixation or orientation=appressed
|branch pubescence=stipitate-glandular;erect-hairy
|corolla some measurement=2.5mm;4.5mm
|disc cypsela pubescence=appressed-hairy
|disc cypsela some measurement=1.2mm;2.5mm
|disc-floret quantity=50;150
|distal leaf-blade length=5mm;12mm
|distal leaf-blade shape=ovate;lanceolate
|distal leaf-blade size=smallest
|distal leaf-blade width=2mm;6mm
|involucre shape=hemispheric
|involucre some measurement=5mm;8mm
|lamina length=7mm;14mm
|lamina width=1mm;1.5mm
|margin presence=absent
|margin prominence=obscured
|margin texture=scarious;scarious
|outer phyllarie growth form or texture=herbaceous
|pappus bristle some measurement=40;50
|phyllarie length=4mm;7mm
|phyllarie shape=lanceolate;linear-lanceolate
|phyllarie size=unequal
|phyllarie variability=equal
|phyllarie width=0.7mm;1.2mm
|ray cypsela pubescence=appressed-hairy
|ray cypsela some measurement=1.2mm;2mm
|ray-floret quantity=30;70
|receptacle diameter=4mm;6mm
|receptacle shape=flat;convex
|stem fixation or orientation=appressed
|stem pubescence=stipitate-glandular;erect-hairy
|whole-organism duration=annual
|whole-organism some measurement=20cm;120cm
}}<!--

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