Cirsium scariosum var. toiyabense

D. J. Keil

Sida 21: 216. 2004.

Common names: Toiyabe thistle
Treatment appears in FNA Volume 19. Treatment on page 158. Mentioned on page 154, 155.

Plants erect, subacaulescent to caulescent, 5–55 cm. Stems usually simple, leafy, glabrous to villous or tomentose with septate trichomes, sometimes thinly arachnoid tomentose. Leaves: blades oblong to oblanceolate or elliptic, pinnately lobed or often unlobed, longer spines less than 1 cm, abaxial faces green and ± glabrous to white-tomentose, adaxial faces green, glabrous or villous with septate trichomes. Heads 1–10+, sessile or short-pedunculate, crowded at stem tips, usually subtended and ± overtopped by distal leaves. Involucres 2–3 cm. Phyllaries: outer and mid lanceolate to ovate, spines slender, 2–4 mm; apices of inner acuminate and entire or abruptly expanded into scarious, erose-toothed appendages. Corollas rose-purple, 23–31 mm, tubes 11–16 mm, throats 4.5–8.5 mm, lobes 5.5–8.5 mm; style tips 3.5–4.5 mm. Cypselae 4–6 mm; pappi 22–25 mm.


Phenology: Flowering spring–summer (May–Aug).
Habitat: Meadows, pastures, springs
Elevation: 1250–2300 m

Discussion

Variety toiyabense occurs in the western Basin and Range province from northern Nevada to southeastern Oregon and southwestern Idaho.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."narrower" is not a number.

less glabrous +  and white-tomentose +
villous +  and glabrous +
short-tailed +
spineless +  and twisted +
erect +  and spreading +
innermost +
expanded +
scarious +
erose-toothed +
subcapitate +, racemiform +  and spiciform +
indeterminate +  and determinate +
David J. Keil +
D. J. Keil +
winged-petiolate +  and sessile +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
linear to elliptic +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
unlobed;lobed;oblong;oblanceolate or elliptic +
3cm;7cm +
10-nerved or 20-nerved +  and rugose +
tawny +  and white +
? (?) +  and ? (?) +
Toiyabe thistle +
actinomorphic +
2.3 cm23 mm <br />0.023 m <br /> (3.1 cm31 mm <br />0.031 m <br />) +
light +  and dark-brown +
compressed +  and ovoid +
fertile +  and bisexual +
Idaho +, Nev. +  and Oreg. +
1250–2300 m +
gray-canescent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Meadows, pastures, springs +
short-pedunculate +  and sessile +
indeterminate +
each +  and sessile +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
glabrate +  and arachnoid +
ovoid;hemispheric +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
bristle-tipped +
lobed +, spinose-dentate +, linear-lanceolate +  and broadly triangular +
0 cm0 mm <br />0 m <br /> (?) +  and 1 cm10 mm <br />0.01 m <br /> (?) +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
entire +  and dentate +
scarious-fringed +  and entire +
rounded +
2-carpellate +
white +  and tan +
persistent +
2.2 cm22 mm <br />0.022 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0 cm0 mm <br />0 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering spring–summer (May–Aug). +
middle +  and outer +
weakly to strongly +
short-caulescent +  and acaulescent +
papillate +  and smooth +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
Illustrated +
erect +  and spreading +
flattened +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
leafy +  and simple +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Cirsium hookerianum var. scariosum +
Cirsium scariosum var. toiyabense +
Cirsium scariosum +
variety +
cylindric +
expanded +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
tipped +  and spineless +
scabro-denticulate +  and narrowed +
expanded +
bristly-dentate to coarsely +
slender +
1.1 cm11 mm <br />0.011 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
taprooted +, caulescent +  and acaulescent +
perennial +  and biennial +
0 cm0 mm <br />0 m <br /> (200 cm2,000 mm <br />2 m <br />) +
subacaulescent +  and caulescent +