Tetraneuris argentea |
Tetraneuris verdiensis |
|
---|---|---|
perkysue |
verde four-nerve daisy |
|
Habit | Perennials, 6–25(–42+) cm. | Perennials, 5–15+ cm. |
Caudices | ± branched, branches notably thickened distally. |
± branched, branches notably thickened distally. |
Stems | 1–8(–12), erect, leafy, ± branched distally. |
1–15, erect, unbranched. |
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 obovate or oblanceolate to linear-oblanceolate, entire, densely hairy (not strigoso-canescent), ± gland-dotted. |
Peduncles | 2–13.5 cm, usually densely hairy. |
4–15 cm, ± hairy. |
Involucres | (5–)7–10 × 8–15 mm. |
5–9 × 6–10 mm. |
Ray florets | 8–14; corollas 11.8–17 mm. |
0. |
Disc florets | 25–75(–100+); corollas yellow proximally, yellow or rarely purplish distally, 2.8–3.8 mm. |
20–40; corollas yellow, 2.5–4 mm. |
Outer phyllaries | 8–11, 4–6.5 mm, margins 0–0.3 mm wide, usually scarious, abaxial faces densely hairy. |
8–10, 4–5(–6) mm, margins 0–0.2 mm wide, sometimes slightly scarious, abaxial faces densely hairy. |
Heads | 1–10(–30) per plant (1–7 per stem), borne singly or in paniculiform to corymbiform arrays. |
1–15 per plant, borne singly. |
Cypselae | 2.4–3.1 mm; pappi of 5–6 obovate, aristate scales 2.1–3.5 mm. |
2.8–4 mm; pappi of 5–6 ovate to lanceolate or obovate to oblanceolate, aristate scales 2.5–3.5 mm. |
2n | = 30, 60. |
|
Tetraneuris argentea |
Tetraneuris verdiensis |
|
Phenology | Flowering (Apr–)May–Aug(–Sep). | Flowering May. |
Habitat | Roadsides, hillsides, open treeless areas, edges of woods | Low gypsum hills |
Elevation | (1500–)2000–2400(–3000) m ((4900–)6600–7900(–9800) ft) | ca. 1000 m (ca. 3300 ft) |
Distribution |
AZ; NM
|
AZ |
Discussion | Of conservation concern. Tetraneuris verdiensis is found only at or near the type locality, east of Camp Verde, Yavapai County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 21, p. 450. | FNA vol. 21, p. 450. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Tetraneuris | 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) | R. A. Denham & B. L. Turner: Phytologia 81: 5, fig. 1. (1996) |
Web links |