Tetraneuris acaulis
Tetraneuris acaulis var. arizonica
perky sue, stemless four-nerve daisy, stemless hymenoxys, stemless woollybase
Arizona four-nerve daisy
± branched, branches notably thickened distally.
1–35(–60), erect, unbranched.
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.
blades spatulate or oblanceolate to linear-oblanceolate, glabrous or moderately to densely hairy (not strigoso-canescent or sericeous), densely gland-dotted.
0.5–30 cm, ± hairy.
(1–)5–15(–30) cm.
7–12 × 8–16 mm.
8–15(–21);
corollas 9–19 mm.
9–15;
corollas 11–17 mm.
25–200+;
corollas yellow, 2.7–4.3 mm.
6–12, 3.9–9(–11.5) mm, margins 0–0.4 mm wide, sometimes slightly scarious, abaxial faces ± hairy.
7–10, 3.9–6.5 mm, margins 0–0.3(–0.4) mm wide, often slightly scarious, abaxial faces sparsely to usually moderately to sometimes densely hairy.
1–35(–60) per plant, borne singly.
1–20(–35) per plant.
2–4 mm;
pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm.
3–3.7 mm;
pappi 2–3.5 mm.
= 28, 30, 56, 60.
Tetraneuris acaulis
Tetraneuris acaulis var. arizonica
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
