Difference between revisions of "Pityopsis ruthii"

(Small) Small

Man. S.E. Fl., 1341. 1933.

Common names: Ruth’s grass-leaved goldenaster
EndemicConservation concern
Basionym: Chrysopsis ruthii Small Bull. Torrey Bot. Club 24: 493. 1897
Synonyms: Heterotheca ruthii (Small) V. L. Harms
Treatment appears in FNA Volume 20. Treatment on page 224. Mentioned on page 223.
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|common_names=Ruth’s grass-leaved goldenaster
 
|common_names=Ruth’s grass-leaved goldenaster
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|code=C
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|label=Conservation concern
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|basionyms={{Treatment/ID/Basionym
 
|name=Chrysopsis ruthii
 
|name=Chrysopsis ruthii
 
|authority=Small
 
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|publication_title=Bull. Torrey Bot. Club
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|publication_place=24: 493. 1897
 
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|synonyms={{Treatment/ID/Synonym
 
|synonyms={{Treatment/ID/Synonym
 
|name=Heterotheca ruthii
 
|name=Heterotheca ruthii
 
|authority=(Small) V. L. Harms
 
|authority=(Small) V. L. Harms
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|rank=species
 
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|hierarchy=Asteraceae;Asteraceae tribe Astereae;Pityopsis;Pityopsis ruthii
 
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Pityopsis;Pityopsis ruthii
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|distribution=Tenn.
 
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|discussion=<p>Of conservation concern.</p><!--
 
|discussion=<p>Of conservation concern.</p><!--
--><p>Pityopsis ruthii is uncommon and known only from the Ocoee and Hiawasee rivers, Polk County. It is federally listed as Endangered and is in the Center for Plant Conservation’s National Collection of Endangered Plants. Changes in river flow due to dams have reduced the size of populations.</p>
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--><p><i>Pityopsis ruthii</i> is uncommon and known only from the Ocoee and Hiawasee rivers, Polk County. It is federally listed as Endangered and is in the Center for Plant Conservation’s National Collection of Endangered Plants. Changes in river flow due to dams have reduced the size of populations.</p>
 
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|publication title=Man. S.E. Fl.,
 
|publication title=Man. S.E. Fl.,
 
|publication year=1933
 
|publication year=1933
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|special status=Endemic;Conservation concern
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|tribe=Asteraceae tribe Astereae
 
|tribe=Asteraceae tribe Astereae
 
|genus=Pityopsis
 
|genus=Pityopsis

Latest revision as of 20:03, 5 November 2020

Perennials, 10–30 cm; rhizomes 3–10 cm. Stems 1–20, erect, green to brown beneath hairs, simple, slender, densely silvery-sericeous, glabrescent. Leaves: basal overwintering, blades linear-lanceolate, shorter than cauline, 30–40 × 3–4 mm, faces sericeous; proximal cauline withering by late summer; cauline crowded, overlapping, spreading to ascending, sessile, blades linear-lanceolate, 30–50 × 2–4.5 mm, margins entire, silvery-sericeous, apices acute, faces silvery-sericeous (hairs anastomosing). Heads 1–8 heads (per branch), in corymbiform arrays. Peduncles 0.5–4 cm, moderately to densely stipitate-glandular, sparsely sericeous; bracteoles 1–3, linear-lanceolate. Involucres narrowly turbino-campanulate, 6–8 mm. Phyllaries in 4–6 series, margins scarious (midnerves pronounced), apices acute, faces sparsely sericeous, moderately to densely stipitate-glandular. Ray florets 9–14(–18); laminae 6–8 mm. Disc florets 30–45; corollas 4.5–6.5 mm, tubes and proximal limbs sparsely pilose, lobes 0.5 mm, glabrous. Cypselae fusiform, ribbed, 3–4 mm, faces sparsely strigose; pappi: outer of linear to linear-triangular scales 0.2–0.8 mm, inner of 25–40 bristles 4.2–6 mm. 2n = 18.


Phenology: Flowering late summer–fall.
Habitat: Soil-filled cracks of phyllite boulders along rivers, in areas with little shade
Elevation: 200–400 m

Discussion

Of conservation concern.

Pityopsis ruthii is uncommon and known only from the Ocoee and Hiawasee rivers, Polk County. It is federally listed as Endangered and is in the Center for Plant Conservation’s National Collection of Endangered Plants. Changes in river flow due to dams have reduced the size of populations.

Selected References

None.

Lower Taxa

None.