Tetraneuris argentea |
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perkysue |
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Habit | Perennials, 6–25(–42+) cm. |
Caudices | ± branched, branches notably thickened distally. |
Stems | 1–8(–12), erect, leafy, ± branched distally. |
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. |
Peduncles | 2–13.5 cm, usually densely hairy. |
Involucres | (5–)7–10 × 8–15 mm. |
Ray florets | 8–14; corollas 11.8–17 mm. |
Disc florets | 25–75(–100+); corollas yellow proximally, yellow or rarely purplish distally, 2.8–3.8 mm. |
Outer phyllaries | 8–11, 4–6.5 mm, margins 0–0.3 mm wide, usually scarious, abaxial faces densely hairy. |
Heads | 1–10(–30) per plant (1–7 per stem), borne singly or in paniculiform to corymbiform arrays. |
Cypselae | 2.4–3.1 mm; pappi of 5–6 obovate, aristate scales 2.1–3.5 mm. |
2n | = 30, 60. |
Tetraneuris argentea |
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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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Source | FNA vol. 21, p. 450. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Tetraneuris |
Sibling taxa | |
Synonyms | Actinella argentea, Hymenoxys argentea, T. formosa, T. leptoclada, T. trinervata |
Name authority | (A. Gray) Greene: Pittonia 3: 269. (1898) |
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