Tetraneuris torreyana

(Nuttall) Greene

Pittonia 3: 265. 1898.

Endemic
Basionym: Actinella torreyana Nuttall Trans. Amer. Philos. Soc., n. s. 7: 379. 1841
Synonyms: Hymenoxys depressa (Torrey & A. Gray) S. L. Welsh & Reveal Hymenoxys lapidicola S. L. Welsh & Neese Hymenoxys torreyana (Nuttall) K. F. Parker Tetraneuris depressa (Torrey & A. Gray) Greene
Treatment appears in FNA Volume 21. Treatment on page 451. Mentioned on page 448.

Perennials, 2–15+ cm. Caudices ± branched, branches notably thickened distally. Stems 1–30 (–40), erect, unbranched. Leaves all basal, new leaves tightly clustered; blades (midribs usually pronounced) spatulate or oblanceolate to linear-oblanceolate, entire, glabrous or usually sparsely, sometimes moderately to densely, hairy, densely glanddotted. Heads 1–10 (–40) per plant, borne singly. Peduncles (0.5–) 2–15 cm, ± hairy proximally, almost always densely lanate distally. Involucres 10–12 × 12–15 mm. Outer phyllaries 4–8, 6–8.5 mm, margins (0.3–) 0.5–1.2 mm wide, usually conspicuously scarious, abaxial faces ± hairy. Ray-florets 7–14; corollas 11–17 mm. Disc-florets 25–150+; corollas yellow, 4–4.7 mm. Cypselae 3–4 mm; pappi of 5–7 obovate to oblanceolate, aristate scales 3–4 (–4.5) mm.


Phenology: Flowering May–Jun(–Sep).
Habitat: Roadsides, hillsides, slopes, open treeless areas, edges of woods
Elevation: (1300–)1700–3100 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Tetraneuris torreyana"
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 +
(Nuttall) Greene +
decurrent +
Actinella torreyana +
compound +  and simple +
hairy +, usually sparsely +  and glabrous +
oblanceolate;linear-oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
0.4 cm4 mm <br />0.004 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Colo. +, Mont. +, Utah +  and Wyo. +
(1300–)1700–3100 m +
more or less +  and eglandular +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, hillsides, slopes, open treeless areas, edges of woods +
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 />) +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
hemispheric;campanulate +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
sessile +  and petiolate +
basal-proximal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
0.5mm +  and 1.2mm +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
0.6 cm6 mm <br />0.006 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
2-carpellate +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
lanate +  and hairy +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Flowering May–Jun(–Sep). +
11 +  and 60 +
bearing subulate enations +, hairy +  and bristly +
hemispheric;conic +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
5 +  and 7 +
aristate +, obovate +  and oblanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
exalbuminous +
1 +  and 30 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Hymenoxys depressa +, Hymenoxys lapidicola +, Hymenoxys torreyana +  and Tetraneuris depressa +
Tetraneuris torreyana +
Tetraneuris +
species +
urceolate +  and campanulate +
dilated +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
shrub +  and subshrub +