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FNA | Family List | FNA Vol. 21 | Asteraceae | Tetraneuris

9d. Tetraneuris acaulis (Pursh) Greene var. epunctata (A. Nelson) Kartesz & Gandhi, Phytologia. 78: 2. 1995.

Tetraneuris epunctata A. Nelson, Bot. Gaz. 37: 275. 1904; Hymenoxys acaulis (Pursh) K. F. Parker var. epunctata (A. Nelson) Cronquist; T. crandallii Rydberg

Plants (2–)6–15(–25+) cm. Leaves: blades oblanceolate to linear-oblanceolate, glabrous or sparsely to moderately hairy (not strigoso-canescent or sericeous), some (usually most or all) eglandular or sparsely gland-dotted. Heads 1–10(–15) per plant. Peduncles (1–)5–15(–25) cm. Outer phyllaries 6–12, 5–7.5 mm, margins 0–0.2 mm wide, sometimes slightly scarious, abaxial faces ± hairy. Ray florets 10–14; corollas 11–19 mm. Cypselae 3–4 mm; pappi 2.8–3.7 mm. 2n = 28, 56.

Flowering May–Jul(–Sep). Roadsides, hillsides, edges of woods; 1600–2700(–3500) m; Colo., Utah, Wyo.

Some plants of Hymenoxys acaulis from south-central to northeastern Utah and northwestern Colorado have moderately gland-dotted leaf blades. We interpret them to be intermediates between var. epunctata and var. arizonica. Plants referable to var. epunctata have eglandular or very sparsely gland-dotted blades; those referable to var. arizonica have densely gland-dotted blades.


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