Tetraneuris acaulis |
Tetraneuris verdiensis |
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perky sue, stemless four-nerve daisy, stemless hymenoxys, stemless woollybase |
verde four-nerve daisy |
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Habit | Perennials, 2–30+ cm. | Perennials, 5–15+ cm. | ||||||||||||
Caudices | ± branched, branches notably thickened distally. |
± branched, branches notably thickened distally. |
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Stems | 1–35(–60), erect, unbranched. |
1–15, erect, unbranched. |
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Leaves | 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. |
all basal (new leaves tightly clustered); blades obovate or oblanceolate to linear-oblanceolate, entire, densely hairy (not strigoso-canescent), ± gland-dotted. |
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Peduncles | 0.5–30 cm, ± hairy. |
4–15 cm, ± hairy. |
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Involucres | 7–12 × 8–16 mm. |
5–9 × 6–10 mm. |
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Ray florets | 8–15(–21); corollas 9–19 mm. |
0. |
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Disc florets | 25–200+; corollas yellow, 2.7–4.3 mm. |
20–40; corollas yellow, 2.5–4 mm. |
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Outer phyllaries | 6–12, 3.9–9(–11.5) mm, margins 0–0.4 mm wide, sometimes slightly scarious, abaxial faces ± hairy. |
8–10, 4–5(–6) mm, margins 0–0.2 mm wide, sometimes slightly scarious, abaxial faces densely hairy. |
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Heads | 1–35(–60) per plant, borne singly. |
1–15 per plant, borne singly. |
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Cypselae | 2–4 mm; pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm. |
2.8–4 mm; pappi of 5–6 ovate to lanceolate or obovate to oblanceolate, aristate scales 2.5–3.5 mm. |
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Tetraneuris acaulis |
Tetraneuris verdiensis |
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Phenology | Flowering May. | |||||||||||||
Habitat | Low gypsum hills | |||||||||||||
Elevation | ca. 1000 m (ca. 3300 ft) | |||||||||||||
Distribution |
AZ; CA; CO; ID; KS; MT; ND; NE; NM; NV; OK; SD; TX; UT; WY; AB; SK
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AZ |
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Discussion | Varieties 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 21, p. 451. | FNA vol. 21, p. 450. | ||||||||||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Tetraneuris | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Tetraneuris | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | Gaillardia acaulis, Hymenoxys acaulis | |||||||||||||
Name authority | (Pursh) Greene: Pittonia 3: 265. (1898) | R. A. Denham & B. L. Turner: Phytologia 81: 5, fig. 1. (1996) | ||||||||||||
Web links |