Tetraneuris acaulis
Tetraneuris linearifolia
perky sue, stemless four-nerve daisy, stemless hymenoxys, stemless woollybase
fineleaf fournerve daisy, slimleaf actinea
± branched, branches notably thickened distally.
none.
1–35(–60), erect, unbranched.
1–10, erect or ± decumbent, leafy, unbranched or branched distally.
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.
basal and cauline, ± hairy, ± gland-dotted;
basal blades spatulate to oblanceolate, entire or with 2–6 teeth or lobes;
proximal cauline blades narrowly spatulate or oblanceolate to linear-oblanceolate, entire or with 2–6 teeth or lobes;
mid blades oblanceolate to linear-oblanceolate to linear, 0.9–9.5(–16) mm wide, entire or with 1–2 teeth or lobes;
distal blades narrowly oblanceolate to linear-oblanceolate to linear, entire or with 1–2 teeth or lobes.
0.5–30 cm, ± hairy.
8–29 cm, ± hairy.
7–12 × 8–16 mm.
5–10 × 7–15 mm.
8–15(–21);
corollas 9–19 mm.
9–25;
corollas 8.2–16.8 mm.
25–200+;
corollas yellow, 2.7–4.3 mm.
50–200+;
corollas yellow, 1.6–3 mm.
6–12, 3.9–9(–11.5) mm, margins 0–0.4 mm wide, sometimes slightly scarious, abaxial faces ± hairy.
8–21, 2.4–5.5 mm, margins 0–0.2 mm wide, not scarious or scarious, abaxial faces ± hairy.
1–35(–60) per plant, borne singly.
8–50(–80) per plant, borne singly or in corymbiform arrays.
2–4 mm;
pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm.
1.5–2.6 mm;
pappi of 4–8 obovate, often aristate scales 1–2.5 mm.
Tetraneuris acaulis
Tetraneuris linearifolia
Varieties 4 (4 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 2 (2 in the flora).
Plants of Tetraneuris linearifolia morphologically intermediate between the two varieties are found in Bee, Duval, Live Oak, and McMullen counties, Texas.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaves sparsely to densely hairy, often lanuginose, sometimes sericeous, not strigoso-canescent; peduncles 0.5–8(–12) cm; outer phyllaries 6.8–9(–11.5) mm; growing at (2100–)3000–3900 m | var. caespitosa |
1. Leaves sparsely to densely hairy, often strigoso-canescent; peduncles (1–)5–20(–30) cm; outer phyllaries 4–7.5 mm; growing at 700–2900(–3500) m | → 2 |
2. Leaf blades usually densely, sometimes sparsely, strigoso-canescent; e of continental divide (except for 2 reports from nw Idaho) | var. acaulis |
2. Leaf blades glabrous or sparsely to moderately to sometimes densely hairy, not strigoso-canescent; w of continental divide | → 3 |
3. Leaf blades glabrous or usually sparsely to moderately or sometimes densely hairy, densely gland-dotted; n Arizona, se California, w Colorado, s Idaho, e Nevada, Utah | var. arizonica |
3. Leaf blades glabrous or sparsely to moderately hairy, at least some (usually most or all) eglandular or sparsely gland-dotted; w Colorado, c, ne Utah, and sw Wyoming | var. epunctata |
1. Stems erect, branched distally; leaves ± hairy, basal blades entire or with 2(–6) teeth or lobes, proximal cauline blades entire or with 1–2 teeth or lobes, mid blades (0.9–)1.4–3(–4.8) mm wide; involucres (7–)8–11(–12) mm diam.; pappus scales aristate; Kansas, New Mexico, Oklahoma, Texas, on limestone-derived soils | var. linearifolia |
1. Stems erect or ± decumbent, ± branched distally; leaves usually densely hairy, basal blades with 2–6 teeth or lobes, proximal cauline blades with 2(–6) teeth or lobes, mid blades (2.5–)3.9–9.5(–16) mm wide; involucres 12–15 mm diam.; pappus scales not aristate; s Texas on sand | var. arenicola |
CalFlora
KS Wildflowers
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
