Tetraneuris ivesiana |
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Ives' four-nerve-daisy |
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Habit | Perennials, 10–26+ cm. |
Caudices | ± branched, branches notably thickened distally. |
Stems | (1–)5–20(–30), erect, leafy, ± branched distally. |
Leaves | basal and cauline, entire, glabrous or sparsely to moderately lanuginose to sericeous, usually densely gland-dotted; basal leaves tightly clustered, blades linear-oblanceolate; proximal cauline blades linear-oblanceolate; mid blades linear-oblanceolate to linear, 1.7–2 mm wide; distal blades linear-oblanceolate to linear. |
Peduncles | 5–18.5 cm, ± hairy, usually densely hairy distally. |
Involucres | 8–12 × 13–17 mm. |
Ray florets | 7–10; corollas 10–20 mm. |
Disc florets | (40–)80–150+; corollas yellow, 3.3–4.5 mm. |
Outer phyllaries | 7–12, 5–6.4 mm, margins 0–0.3(–0.4) mm wide, usually scarious, abaxial faces ± hairy. |
Heads | (1–)5–30(–40) per plant (1–5 per stem), borne singly or in paniculiform to corymbiform arrays. |
Cypselae | 3–4.1 mm; pappi of 5–7 lanceolate or obovate to oblanceolate, aristate scales 2.7–4.5 mm. |
2n | = 28, 30, 56, 60. |
Tetraneuris ivesiana |
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Phenology | Flowering Apr–Aug. |
Habitat | Roadsides, hillsides, open treeless areas, edges of woods |
Elevation | 1300–2900 m (4300–9500 ft) |
Distribution |
AZ; CO; NM; UT
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Source | FNA vol. 21, p. 450. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Tetraneuris |
Sibling taxa | |
Synonyms | Hymenoxys acaulis var. ivesiana, Hymenoxys argentea var. ivesiana, Hymenoxys ivesiana, T. intermedia, T. mancosensis, T. pilosa |
Name authority | Greene: Pittonia 3: 269. (1898) |
Web links |