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.

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.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Pityopsis ruthii"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John C. Semple +
(Small) Small +
overwintering +
decurrent +
Chrysopsis ruthii +
3-11-parallel-nerved +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
linear-lanceolate;linear-lanceolate +
2mm;4.5mm +
rugulose +  and muricate +
linear-lanceolate +
light tan +  and light rust +
? (?) +  and ? (?) +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
overlapping +  and crowded +
Ruth’s grass-leaved goldenaster +
not 2-lipped +  and actinomorphic +
ampliate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
200–400 m +
strigose +, stipitate-glandular +, sericeous +  and silvery-sericeous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Soil-filled cracks of phyllite boulders along rivers, in areas with little shade +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
turbino-campanulate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cauline +  and basal +
erect;spreading +
deltate +
silvery-sericeous +
2-carpellate +
persistent +
sericeous +  and stipitate-glandular +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering late summer–fall. +
lanceolate +
Man. S.E. Fl., +
bearing subulate enations +, hairy +  and bristly +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
linear +  and linear-triangular +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
green +  and brown +
1 +  and 20 +
slender +
appendaged +  and truncate +
papillate +  and smooth +
Heterotheca ruthii +
Pityopsis ruthii +
Pityopsis +
species +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
tree +, shrub +  and subshrub +