Tetraneuris acaulis
Tetraneuris ivesiana
perky sue, stemless four-nerve daisy, stemless hymenoxys, stemless woollybase
Ives' four-nerve-daisy
± branched, branches notably thickened distally.
± branched, branches notably thickened distally.
1–35(–60), erect, unbranched.
(1–)5–20(–30), erect, leafy, ± 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, 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.
0.5–30 cm, ± hairy.
5–18.5 cm, ± hairy, usually densely hairy distally.
7–12 × 8–16 mm.
8–12 × 13–17 mm.
8–15(–21);
corollas 9–19 mm.
7–10;
corollas 10–20 mm.
25–200+;
corollas yellow, 2.7–4.3 mm.
(40–)80–150+;
corollas yellow, 3.3–4.5 mm.
6–12, 3.9–9(–11.5) mm, margins 0–0.4 mm wide, sometimes slightly scarious, abaxial faces ± hairy.
7–12, 5–6.4 mm, margins 0–0.3(–0.4) mm wide, usually scarious, abaxial faces ± hairy.
1–35(–60) per plant, borne singly.
(1–)5–30(–40) per plant (1–5 per stem), borne singly or in paniculiform to corymbiform arrays.
2–4 mm;
pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm.
3–4.1 mm;
pappi of 5–7 lanceolate or obovate to oblanceolate, aristate scales 2.7–4.5 mm.
= 28, 30, 56, 60.
Tetraneuris acaulis
Tetraneuris ivesiana
Varieties 4 (4 in the flora).
(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 |
CalFlora
KS Wildflowers
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
SW CO Wildflowers
