Tetraneuris acaulis |
Tetraneuris turneri |
|||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
perky sue, stemless four-nerve daisy, stemless hymenoxys, stemless woollybase |
turner's four-nerve daisy |
|||||||||||||
Habit | Perennials, 2–30+ cm. | Perennials, 22–50+ cm. | ||||||||||||
Caudices | ± branched, branches notably thickened distally. |
± branched, branches not notably thickened distally. |
||||||||||||
Stems | 1–35(–60), erect, unbranched. |
1–20, erect or ± decumbent, sometimes branched near bases, usually densely woolly or long-hairy among proximal leaves. |
||||||||||||
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-proximal, new leaves not tightly clustered; blades linear-oblanceolate, oblanceolate, or spatulate, entire or basal and proximal with 2(–4) teeth or lobes, moderately to densely woolly, usually densely gland-dotted. |
||||||||||||
Peduncles | 0.5–30 cm, ± hairy. |
20–50 cm, moderately to densely hairy. |
||||||||||||
Involucres | 7–12 × 8–16 mm. |
8–15 × 12–20 mm. |
||||||||||||
Ray florets | 8–15(–21); corollas 9–19 mm. |
12–24; corollas 14–20 mm. |
||||||||||||
Disc florets | 25–200+; corollas yellow, 2.7–4.3 mm. |
100–250+; corollas yellow proximally, yellow to purplish distally, 3.5–3.8 mm. |
||||||||||||
Outer phyllaries | 6–12, 3.9–9(–11.5) mm, margins 0–0.4 mm wide, sometimes slightly scarious, abaxial faces ± hairy. |
12–16, 5.2–7.8(–10) mm, margins 0–0.2 mm wide, sometimes slightly scarious, abaxial faces ± hairy. |
||||||||||||
Heads | 1–35(–60) per plant, borne singly. |
1–20 per plant, borne singly. |
||||||||||||
Cypselae | 2–4 mm; pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm. |
2.6–3.4 mm; pappi of 6–7 lanceolate to obovate or oblanceolate, often aristate scales 3–4 mm. |
||||||||||||
2n | = 90. |
|||||||||||||
Tetraneuris acaulis |
Tetraneuris turneri |
|||||||||||||
Phenology | Flowering (Feb–)Mar–Apr(–Jun). | |||||||||||||
Habitat | Roadsides, pastures | |||||||||||||
Elevation | 50–200 m (200–700 ft) | |||||||||||||
Distribution |
AZ; CA; CO; ID; KS; MT; ND; NE; NM; NV; OK; SD; TX; UT; WY; AB; SK
|
TX; Mexico (Coahuila) |
||||||||||||
Discussion | Varieties 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||||||||||
Key |
|
|||||||||||||
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 | Hymenoxys turneri | ||||||||||||
Name authority | (Pursh) Greene: Pittonia 3: 265. (1898) | (K. F. Parker) K. F. Parker: Phytologia 45: 467. (1980) | ||||||||||||
Web links |