Tetraneuris acaulis var. arizonica

(Greene) K. F. Parker

Phytologia 45: 467. 1980.

Endemic
Basionym: Tetraneuris arizonica Greene Pittonia 3: 266. 1898
Synonyms: Hymenoxys acaulis var. arizonica (Greene) K. F. Parker Hymenoxys acaulis var. nana S. L. Welsh T. acaulis var. nana (S. L. Welsh) Kartesz & Gandhi
Treatment appears in FNA Volume 21. Treatment on page 453. Mentioned on page 451, 452.
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Plants (2–) 6–15 (–30+) cm. Leaves: blades spatulate or oblanceolate to linear-oblanceolate, glabrous or moderately to densely hairy (not strigoso-canescent or sericeous), densely glanddotted. Heads 1–20 (–35) per plant. Peduncles (1–) 5–15 (–30) cm. Outer phyllaries 7–10, 3.9–6.5 mm, margins 0–0.3 (–0.4) mm wide, often slightly scarious, abaxial faces sparsely to usually moderately to sometimes densely hairy. Ray-florets 9–15; corollas 11–17 mm. Cypselae 3–3.7 mm; pappi 2–3.5 mm. 2n = 28, 30, 56, 60.


Phenology: Flowering (Apr–)May–Jul(–Sep).
Habitat: Roadsides, hillsides, grasslands, edges of woods, aspen meadows
Elevation: 1300–2900 m

Distribution

V21-1136-distribution-map.gif

Ariz., Calif., Colo., Idaho, Nev., Utah.

Discussion

Selected References

None.

Lower Taxa

None.
60 +, 56 +, 30 +  and 28 +
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Mark W. Bierner +  and Billie L. Turner +
(Greene) K. F. Parker +
decurrent +
Tetraneuris arizonica +
more or less +  and eglandular +
glabrous or +  and moderately densely hairy +
oblanceolate;linear-oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
1.1 cm11 mm <br />0.011 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Colo. +, Idaho +, Nev. +  and Utah. +
1300–2900 m +
more or less +  and eglandular +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, hillsides, grasslands, edges of woods, aspen meadows +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
hemispheric;campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
sessile +  and petiolate +
basal-proximal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
0mm +  and 0.3mm +
0.9 cm9 mm <br />0.009 m <br /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
0.39 cm3.9 mm <br />0.0039 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
2-carpellate +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Flowering (Apr–)May–Jul(–Sep). +
11 +  and 60 +
bearing subulate enations +, hairy +  and bristly +
hemispheric;conic +
5 +  and 8 +
aristate +, obovate +  and oblanceolate +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
exalbuminous +
1 +  and 35 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Hymenoxys acaulis var. arizonica +, Hymenoxys acaulis var. nana +  and T. acaulis var. nana +
Tetraneuris acaulis var. arizonica +
Tetraneuris acaulis +
variety +
urceolate +  and campanulate +
dilated +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +