Tonestus graniticus

(Tiehm & L. M. Schultz) G. L. Nesom & D. R. Morgan

Phytologia 68: 178. 1990.

Common names: Lone Mountain serpentweed
EndemicConservation concern
Basionym: Haplopappus graniticus Tiehm & L. M. Schultz Brittonia 37: 165, fig. 1. 1985
Treatment appears in FNA Volume 20. Treatment on page 184. Mentioned on page 182.

Perennials, cespitose to ± mat-forming, 5.5–14 cm; with branched caudices surmounting well-developed taproots. Stems (clothed with marcescent leaf-bases) densely stipitate-glandular. Leaves: basal blades ovate to spatulate, 12–40 × 5–12 mm; cauline petiolate (proximal) to sessile and ± clasping (distal), blades oblong to broadly lanceolate, 4–28 × 1–8 mm, markedly reduced distally; 1-nerved or very weakly 3-nerved, margins usually irregularly dentate, rarely (basal, distal) entire, faces densely scabrous (hairs multicellular, conic), stipitate-glandular. Heads (1–) 3–7 (–11), in racemiform or apparently corymbiform arrays. Peduncles 0–15 mm (often apparently bracteolate). Involucres narrowly campanulate, 5–9 × 6–10 mm. Phyllaries 18–32, in 3–4 series, often reflexed distally, green, 1-nerved, unequal, proximally chartaceous and ± keeled, margins eciliate, faces stipitate-glandular; outer and mid ovate to oblong, 2–6 × 1–2 mm, apices obtuse to acute; inner linear to narrowly lanceolate, 4–6 × 1–2 mm, margins scarious, stipitate-glandular distally, apices acute to acuminate. Ray-florets 0. Disc-florets 13–23; corollas funnelform to ± ampliate distally, 3.5–5.5 mm, scarcely exceeding involucres, lobes erect to slightly spreading, 0.8–1 mm, 1/5–1/4 corolla length; anthers 1.6–2.1 mm; style-branch appendages lanceolate, 0.7–1.1 mm, stigmatic lines 0.6–1.1 mm. Cypselae cylindric, 1.5–3 mm, weakly 4–7-nerved, faces strigose; pappus bristles 25–35, brittle. 2n = 18.


Phenology: Flowering and fruiting mid–late summer.
Habitat: Crevices of granite outcrops
Elevation: 2400 m

Discussion

Of conservation concern.

Tonestus graniticus is known only from the Great Basin, from the east side of Lone Mountain, Esmeralda County.

Selected References

None.

Lower Taxa

None.
... more about "Tonestus graniticus"
not tailed +, rounded +  and obtuse +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
distinct +
acute;acuminate +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and racemiform +
indeterminate +  and determinate +
Caleb A. Morse +
(Tiehm & L. M. Schultz) G. L. Nesom & D. R. Morgan +
5-nerved +, 3-nerved +  and 1-nerved +
1.2 cm12 mm <br />0.012 m <br /> (4 cm40 mm <br />0.04 m <br />) +
ovate +  and spatulate +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
decurrent +
Haplopappus graniticus +
compound +  and simple +
0.4 cm4 mm <br />0.004 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
oblong;broadly lanceolate +
reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
rugulose +  and muricate +
barbellulate +  and barbellate +
petiolate +  and sessile +
Lone Mountain serpentweed +
not 2-lipped +  and actinomorphic +
ampliate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
2400 m +
strigose +  and stipitate-glandular +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Crevices of granite outcrops +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
linear +  and narrowly lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
campanulate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
3-nerved +  and 1-nerved +
cauline +  and basal +
erect;slightly spreading +
deltate +  and broadly lanceolate +
entire +  and dentate +
stipitate-glandular +  and eciliate +
fimbriate +, lobed +  and dentate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
ovate +  and oblong +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
2-carpellate +
persistent +
pliable +  and brittle +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering and fruiting mid–late summer. +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Endemic +  and Conservation concern +
stipitate-glandular +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
appendaged +  and truncate +
papillate +  and smooth +
Haplopappus sect. Tonestus +
well-developed +
Tonestus graniticus +
Tonestus +
species +
ampliate +
cespitose +  and more or less mat-forming +
5.5 cm55 mm <br />0.055 m <br /> (14 cm140 mm <br />0.14 m <br />) +
tree +, shrub +  and subshrub +