View source for Psilactis tenuis

{{Treatment/ID
|accepted_name=Psilactis tenuis
|accepted_authority=S. Watson
|publications={{Treatment/Publication
|title=Proc. Amer. Acad. Arts
|place=26: 139. 1891
|year=1891
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Machaeranthera tenuis
|authority=(S. Watson) B. L. Turner & D. B. Horne
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Psilactis;Psilactis tenuis
|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 tenuis]]</div></div>
|volume=Volume 20
|mention_page=page 462
|treatment_page=page 463
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>or biennials, 25–100 cm. <b>Stems</b> and branches coarsely antrorse- or erect-hairy, often scabrous, usually stipitate-glandular distally, sometimes proximally. <b>Distal</b> leaf blades sessile, linear-lanceolate to narrowly elliptic or linear, smallest 3–4 × 1–1.5 mm. <b>Involucres</b> broadly turbinate, 4–6 mm. <b>Phyllaries</b> linear-lanceolate to linear, equal or slightly unequal, 2.5–5 × 0.3–0.6 mm, bases indurate, margins scarious. <b>Receptacles</b> convex, 1.8–2.5 mm diam. <b>Ray</b> florets 10–35; laminae 5–8 × 0.7–1 mm. <b>Disc</b> florets 20–55; corollas 3–4 mm. <b>Ray</b> cypselae 1.2–1.7 mm, sparsely appressed-hairy. <b>Disc</b> cypselae 1.5–2.5 mm, sparsely appressed-hairy; pappi 20–35, 2.5–4 mm. <b>2n</b> = 8.</span><!--

-->{{Treatment/Body
|phenology=Flowering (May–)Aug–Oct.
|habitat=Calcareous soils in open oak and pine-oak woodlands, rocky streambeds
|elevation=1700–2600 m
|distribution=Tex.;Mexico (Coahuila;Nuevo León;Tamaulipas;Zacatecas).
|discussion=<p>In the flora area, Psilactis tenuis is known only from the Davis Mountains. Because of its distribution in Mexico, it would be expected to occur in additional areas to the southeast of the Davis Mountains, such as the Glass Mountains and Chisos Mountains. Apparently no records of it exist from those areas.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Psilactis tenuis
|author=
|authority=S. Watson
|rank=species
|parent rank=genus
|synonyms=Machaeranthera tenuis
|basionyms=
|family=Asteraceae
|phenology=Flowering (May–)Aug–Oct.
|habitat=Calcareous soils in open oak and pine-oak woodlands, rocky streambeds
|elevation=1700–2600 m
|distribution=Tex.;Mexico (Coahuila;Nuevo León;Tamaulipas;Zacatecas).
|reference=None
|publication title=Proc. Amer. Acad. Arts
|publication year=1891
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V20_1070.xml
|tribe=Asteraceae tribe Astereae
|genus=Psilactis
|species=Psilactis tenuis
}}<!--

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