Tetraneuris argentea |
Tetraneuris acaulis |
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perkysue |
perky sue, stemless four-nerve daisy, stemless hymenoxys, stemless woollybase |
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Habit | Perennials, 6–25(–42+) cm. | Perennials, 2–30+ cm. | ||||||||||||
Caudices | ± branched, branches notably thickened distally. |
± branched, branches notably thickened distally. |
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Stems | 1–8(–12), erect, leafy, ± branched distally. |
1–35(–60), erect, unbranched. |
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Leaves | basal and cauline, entire, usually densely strigoso-canescent, ± gland-dotted; basal leaves tightly clustered, blades spatulate to oblanceolate; proximal cauline blades oblanceolate; mid blades oblanceolate to linear-oblanceolate, 2.5–5 mm wide; distal blades linear-lanceolate to linear. |
all basal, new leaves tightly clustered; blades spatulate or oblanceolate to linear-oblanceolate, entire, glabrous or ± hairy, often lanuginose, sericeous, or strigoso-canescent, eglandular or ± gland-dotted. |
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Peduncles | 2–13.5 cm, usually densely hairy. |
0.5–30 cm, ± hairy. |
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Involucres | (5–)7–10 × 8–15 mm. |
7–12 × 8–16 mm. |
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Ray florets | 8–14; corollas 11.8–17 mm. |
8–15(–21); corollas 9–19 mm. |
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Disc florets | 25–75(–100+); corollas yellow proximally, yellow or rarely purplish distally, 2.8–3.8 mm. |
25–200+; corollas yellow, 2.7–4.3 mm. |
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Outer phyllaries | 8–11, 4–6.5 mm, margins 0–0.3 mm wide, usually scarious, abaxial faces densely hairy. |
6–12, 3.9–9(–11.5) mm, margins 0–0.4 mm wide, sometimes slightly scarious, abaxial faces ± hairy. |
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Heads | 1–10(–30) per plant (1–7 per stem), borne singly or in paniculiform to corymbiform arrays. |
1–35(–60) per plant, borne singly. |
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Cypselae | 2.4–3.1 mm; pappi of 5–6 obovate, aristate scales 2.1–3.5 mm. |
2–4 mm; pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm. |
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2n | = 30, 60. |
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Tetraneuris argentea |
Tetraneuris acaulis |
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Phenology | Flowering (Apr–)May–Aug(–Sep). | |||||||||||||
Habitat | Roadsides, hillsides, open treeless areas, edges of woods | |||||||||||||
Elevation | (1500–)2000–2400(–3000) m ((4900–)6600–7900(–9800) ft) | |||||||||||||
Distribution |
AZ; NM
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AZ; CA; CO; ID; KS; MT; ND; NE; NM; NV; OK; SD; TX; UT; WY; AB; SK
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Discussion | Varieties 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 450. | FNA vol. 21, p. 451. | ||||||||||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Tetraneuris | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Tetraneuris | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | Actinella argentea, Hymenoxys argentea, T. formosa, T. leptoclada, T. trinervata | Gaillardia acaulis, Hymenoxys acaulis | ||||||||||||
Name authority | (A. Gray) Greene: Pittonia 3: 269. (1898) | (Pursh) Greene: Pittonia 3: 265. (1898) | ||||||||||||
Web links |