Tetraneuris acaulis
Tetraneuris acaulis var. acaulis
perky sue, stemless four-nerve daisy, stemless hymenoxys, stemless woollybase
stemless 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, usually densely, sometimes sparsely, strigoso-canescent, sparsely to moderately or densely gland-dotted.
0.5–30 cm, ± hairy.
(2–)8–20(–30) cm.
7–12 × 8–16 mm.
8–15(–21);
corollas 9–19 mm.
8–14;
corollas 9–15 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.
6–10, 4–7 mm, margins 0–0.2(–0.4) mm wide, sometimes slightly scarious, abaxial faces usually densely hairy.
1–35(–60) per plant, borne singly.
1–10(–15) per plant.
2–4 mm;
pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm.
2.5–3 mm;
pappi 2.2–2.9 mm.
= 28, 30, 56, 60.
Tetraneuris acaulis
Tetraneuris acaulis var. acaulis
Varieties 4 (4 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Some plants of var. acaulis from Colorado and southeastern Wyoming have considerably less hairy and/or more densely gland-dotted leaves, making them easy to confuse with var. arizonica. As to distribution, label on a collection at LL reads, “From W. A. Curtis, Lewistown [Idaho], without definite locality but probably collected in that vicinity.” Also, the holotype and isotype of Tetraneuris septentrionalis were collected in “Palouse County, Idaho.” These are the only collections we have seen that place var. acaulis west of the continental divide.
(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
