Cirsium ochrocentrum var. martinii

(Barlow-Irick) D. J. Keil

Sida 21: 215. 2004.

Common names: Martin’s thistle
Basionym: Cirsium ochrocentrum subsp. martinii Barlow-Irick Novon 9: 320, fig. 2. 1999
Treatment appears in FNA Volume 19. Treatment on page 123.

Stems leafy, nodes usually well separated. Leaves: distal cauline bases clasping, or if decurrent, spiny wings usually less than 1 cm. Corollas red, pink, or reddish purple (rarely white). 2n = 30, 31, 32, 34.


Phenology: Flowering spring–autumn (May–Sep).
Habitat: Desert grasslands, arid shrublands, pine-, oak-, juniper-, or mesquite-dominated woodlands, often in disturbed areas, grassy slopes in montane pine forests
Elevation: 1300–2200 m

Distribution

V19-82-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Sonora), Mexico (Durango)

Discussion

Variety martinii occurs from east-central and southeastern Arizona to western New Mexico and is scattered southward into north-central Mexico.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

34 +, 32 +, 31 +  and 30 +
white-tomentose +
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 +
(Barlow-Irick) D. J. Keil +
winged-petiolate +
less auriculate +  and long-decurrent +
Cirsium ochrocentrum subsp. martinii +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
undulate;oblong;narrowly elliptic +
2cm;8cm +
10-nerved or 20-nerved +  and rugose +
tawny +  and white +
Martin’s thistle +
actinomorphic +
reddish purple +, pink +  and red +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
compressed +  and ovoid +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Sonora) +  and Mexico (Durango) +
1300–2200 m +
gray-canescent +  and glabrous +
spineless +  and scabrid-margined +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Desert grasslands, arid shrublands, pine-, oak-, juniper-, or mesquite-dominated woodlands, often in disturbed areas, grassy slopes in montane pine forests +
indeterminate +
each +  and sessile +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
glabrate +  and arachnoid +
ovoid;hemispheric or broadly campanulate +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
bristle-tipped +
cleft +  and spinose-dentate +
triangular +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
coarsely dentate or +  and shallowly deeply pinnatifid +
2-carpellate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
persistent +
usually noticeably shorter +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering spring–autumn (May–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 +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ascending +  and erect +
1 +  and 20 +
darker +  and lighter +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Compositae +
Cirsium ochrocentrum var. martinii +
Cirsium ochrocentrum +
variety +
cylindric +
expanded +
0.6 cm6 mm <br />0.006 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
bristly-dentate to coarsely +
slender +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
30 cm300 mm <br />0.3 m <br /> (90 cm900 mm <br />0.9 m <br />) +
tree +, vine +, shrub +  and subshrub +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +