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 gland-dotted. 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"
Mark W. Bierner +  and Billie L. Turner +
(Nuttall) Greene +
Actinella torreyana +
Colo. +, Mont. +, Utah +  and Wyo. +
(1300–)1700–3100 m +
Roadsides, hillsides, slopes, open treeless areas, edges of woods +
Flowering May–Jun(–Sep). +
Hymenoxys depressa +, Hymenoxys lapidicola +, Hymenoxys torreyana +  and Tetraneuris depressa +
Tetraneuris torreyana +
Tetraneuris +
species +