Cirsium barnebyi

S. L. Welsh & Neese

Brittonia 33: 296, fig. 3. 1981.

Common names: Barneby’s thistle
EndemicConservation concern
Treatment appears in FNA Volume 19. Treatment on page 124. Mentioned on page 106, 107, 108.

Perennials, 30–50 cm; caudices and woody taproots. Stems 1–few, erect, gray-tomentose or glabrate; branches few, above middle, ascending. Leaves: blades oblongelliptic, 10–35 × 2–7 cm, strongly undulate, margins shallowly to deeply lobed, lobes 8–15 pairs, linear-lanceolate to broadly triangular, closely spaced, spreading, coarsely spinose-dentate or cleft into 2–5 spine-tipped divisions, main spines 3–5 mm, faces densely gray-white-tomentose; basal usually present at flowering, winged-petiolate; principal cauline becoming sessile and progressively reduced distally, bases decurrent as spiny wings to 5 cm; distal cauline usually much reduced, less lobed. Heads 1–20+, borne singly or clustered at branch tips, in leafy, ± corymbiform arrays. Peduncles 0–4 cm. Involucres ovoid to hemispheric or campanulate, 1.7–2 × 1.5–2 cm, loosely arachnoid on phyllary margins or glabrate. Phyllaries in 6–9 series, imbricate, ovate (outer) to linear-lanceolate (inner), entire, abaxial faces with narrow glutinous ridge; outer and middle appressed, spines ascending to spreading, stramineous, 2–7 mm; apices of inner often flexuous, narrow, flat, entire, spineless, glabrous. Corollas lavender to pink-purple, 18–28 mm, tubes 7–9 mm, throats 4–8 mm, lobes 5–11 mm; style tips 3.5–5 mm. Cypselae tan to brown, 5–5.5 mm, apical collars colored like body, narrow; pappi 15–23 mm.


Phenology: Flowering summer (Jun–Sep).
Habitat: Dry juniper woodlands, sagebrush scrub, on shale, limestone, sandstone
Elevation: 1600–2600 m

Discussion

Of conservation concern.

Cirsium barnebyi occurs from the southern Rocky Mountains of southwestern Wyoming, northeastern Utah, and northwestern Colorado.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Cirsium barnebyi"
short-tailed +
spineless +  and twisted +
dentate +, entire +  and spine-tipped +
erect +  and spreading +
innermost +
scarious +
corymbiform +, paniculiform +, subcapitate +, spiciform +  and racemiform +
indeterminate +  and determinate +
David J. Keil +
S. L. Welsh & Neese +
winged-petiolate +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
undulate;oblongelliptic +
2cm;7cm +
10-nerved or 20-nerved +  and rugose +
tawny +  and white +
? (?) +  and ? (?) +
Barneby’s thistle +
actinomorphic +
lavender +  and pink-purple +
1.8 cm18 mm <br />0.018 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
tan +  and brown +
compressed +  and ovoid +
fertile +  and bisexual +
Colo. +, Utah +  and Wyo. +
1600–2600 m +
gray-white-tomentose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry juniper woodlands, sagebrush scrub, on shale, limestone, sandstone +
clustered +  and or +
indeterminate +
each +  and sessile +
1.7 cm17 mm <br />0.017 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glabrate +  and arachnoid +
ovoid;hemispheric or campanulate +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
bristle-tipped +
cleft +  and spinose-dentate +
linear-lanceolate +  and broadly triangular +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
entire +  and dentate +
2-carpellate +
persistent +
1.5 cm15 mm <br />0.015 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering summer (Jun–Sep). +
middle +  and outer +
weakly to strongly +
papillate +  and smooth +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
Endemic +  and Conservation concern +
stramineous +
ascending +  and spreading +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
spiny-winged +, simple +  and branched +
1 +  and few +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Compositae +
Cirsium barnebyi +
species +
cylindric +
expanded +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
bristly-dentate to coarsely +
slender +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
tree +, vine +, shrub +  and subshrub +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +