Townsendia rothrockii

A. Gray ex Rothrock

Rep. U.S. Geogr. Surv., Wheeler 6: 148. 1879.

Treatment appears in FNA Volume 20. Treatment on page 202. Mentioned on page 195, 203.

Perennials, 1–3 cm (± pulvinate). Stems ± erect; internodes 0.1–1+ mm, glabrous or ± strigose. Leaves basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. Heads ± sessile or on peduncles 5–25+ mm. Involucres ± hemispheric, 12–28+ mm diam. Phyllaries 40–60+ in (3–) 4–5+ series, the longer obovate to oblanceolate, 7–9+ mm (l/w = 2.5–5), apices obtuse to acute, abaxial faces glabrous. Ray-florets 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. Disc-florets 60–100+; corollas 3.5–4.5+ mm. Cypselae 4 mm, faces nearly glabrous (discs) or sparsely hairy (ray, hairs mostly at bases), hair tips glochidiform; pappi persistent; on ray cypselae 12–20 lanceolate to subulate scales 0.5–1.5 mm; on disc cypselae 15–30 subulate to setiform scales 3–6 mm. 2n = 36 (apomicts).


Phenology: Flowering Aug.
Habitat: South slopes
Elevation: 3600–4000 m

Discussion

Of conservation concern.

The types of Townsendia rothrockii and T. glabella may be conspecific.

Selected References

None.

Lower Taxa

None.

"broader" is not a number.

... more about "Townsendia rothrockii"
not tailed +, rounded +  and obtuse +
distinct +
obtuse;acute +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
A. Gray ex Rothrock +
decurrent +
mostly spatulate;oblanceolate lanceolate or linear +
rugulose +  and muricate +
barbellulate +  and barbellate +
not 2-lipped +  and actinomorphic +
blue +  and purplish +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
obovate +  and oblanceolate +
fertile +  and bisexual +
fertile +  and bisexual +
3600–4000 m +
hairy +, glabrous +  and strigose +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
South slopes +
glochidiform +
on peduncles +  and sessile +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
strigose +  and glabrous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
hemispheric +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
cauline +  and basal +
less spatulate;oblanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
spreading;erect +
lance-deltate +  and lance-oblong +
dentate to pinnatifid +  and entire +
lobed +, toothed +  and entire +
2-carpellate +
persistent +
12 +  and 20 +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering Aug. +
obovate +  and oblanceolate +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Rep. U.S. Geogr. Surv., Wheeler +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
convex;flat +
15 +  and 30 +
subulate +  and setiform +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
exalbuminous +
villous +, strigose +, strigillose +, sericeous +, piloso-strigose +, piloso-hirsute +, pilose +, hispidulous +, glabrous +  and glabrate +
strigoso-scabrellous +  and scabrellous +
lance-deltate +  and attenuate +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Townsendia rothrockii +
Townsendia +
species +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
tree +, shrub +  and subshrub +