Xanthisma spinulosum var. spinulosum

Synonyms: Haplopappus spinulosus subsp. cotula (Small) H. M. Hall Haplopappus texensis R. C. Jackson Machaeranthera texensis (R. C. Jackson) Shinners Sideranthus turbinellus Rydberg
Treatment appears in FNA Volume 20. Mentioned on page 391, 392.

Perennials, 10–40 cm, rarely woody at base. Stems spreading to sprawling, rarely stiffly erect, usually much branched in proximal 1/2–2/3; mid internodes 2–5 mm. Leaves numerous, equally spaced, mostly spreading to loosely ascending, not much reduced distally, margins pinnatifid or 2-pinnatifid, lobes linear to lanceolate, mostly 2–5 mm, faces usually hairy, rarely glabrous, usually stipitate-glandular. Heads 2–10+ in diffuse arrays. Peduncles relatively terminal and lateral, 0.5–2 cm. Involucres 8–12 mm wide. 2n = 8, 16.


Phenology: Flowering spring–fall.
Habitat: Rocky to sandy plains and rolling hills, washes, roadsides
Elevation: 300–1300 m

Distribution

V20-890-distribution-map.gif

Alta., Man., Sask., Ariz., Colo., Idaho, Iowa, Kans., Minn., Mont., Nebr., N.Mex., N.Dak., Okla., Utah, Wyo., Mexico (Coahuila), Mexico (Nuevo León), Mexico (San Luis Potosí), Mexico (Tamaulipas), Mexico (Zacatecas)

Discussion

Selected References

None.

Lower Taxa

None.

"spreading" is not a number.

not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Ronald L. Hartman +
(Pursh) D. R. Morgan & R. L. Hartman +
decurrent +
indurate +
Amellus spinulosus +
0.2 cm2 mm <br />0.002 m <br /> (8 cm80 mm <br />0.08 m <br />) +
oblong;lanceolate +
reduced +
0.1cm;3cm +
rugulose +  and muricate +
barbellulate +  and barbellate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
not 2-lipped +  and actinomorphic +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
flattened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
Alta. +, Man. +, Sask. +, Ariz. +, Colo. +, Idaho +, Iowa +, Kans. +, Minn. +, Mont. +, Nebr. +, N.Mex. +, N.Dak. +, Okla. +, Utah +, Wyo. +, Mexico (Coahuila) +, Mexico (Nuevo León) +, Mexico (San Luis Potosí) +, Mexico (Tamaulipas) +  and Mexico (Zacatecas) +
300–1300 m +
stipitate-glandular +, glabrous +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky to sandy plains and rolling hills, washes, roadsides +
discoid +  and radiate +
in corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hemispheric;cupulate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ovate +  and orbiculate or depressed-elliptic +
unequal +
1mm;2.5mm +
serrate +  and entire +
sessile +  and short-petiolate +
cauline +  and basal +
reduced +
bristle-tipped +
linear +  and lanceolate +
entire +  and dentate +
2-pinnatifid +  and pinnatifid +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2-carpellate +
persistent +
30 +  and 90 +
flattened +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
stipitate-glandular +, hairy +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering spring–fall. +
light green +  and stramineous +
appressed +  and squarrose +
linear +  and linear-lanceolate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
connate +  and distinct +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
connate +  and distinct +
laciniate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
connate +  and distinct +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
unequal +
erect +, spreading +  and sprawling +
1 +  and 30 +
green patch +
expanded +
appendaged +  and truncate +
papillate +  and smooth +
Haplopappus spinulosus subsp. cotula +, Haplopappus texensis +, Machaeranthera texensis +  and Sideranthus turbinellus +
Xanthisma spinulosum var. spinulosum +
Xanthisma spinulosum +
variety +
stipitate-glandular +, glabrous +  and hairy +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
4 +, 3 +  and [2 +