Turner's Four Nerve Daisy

Perennials, 22–50+ cm. Caudices ± branched, branches not notably thickened distally. Stems 1–20, erect or ± decumbent, sometimes branched near bases, usually densely woolly or long-hairy among proximal leaves. Leaves all basal-proximal, new leaves not tightly clustered; blades linear-oblanceolate, oblanceolate, or spatulate, entire or basal and proximal with 2(–4) teeth or lobes, moderately to densely woolly, usually densely gland-dotted. Heads 1–20 per plant, borne singly. Peduncles 20–50 cm, moderately to densely hairy. Involucres 8–15 × 12–20 mm. Outer phyllaries 12–16, 5.2–7.8(–10) mm, margins 0–0.2 mm wide, sometimes slightly scarious, abaxial faces ± hairy. Ray florets 12–24; corollas 14–20 mm. Disc florets 100–250+; corollas yellow proximally, yellow to purplish distally, 3.5–3.8 mm. Cypselae 2.6–3.4 mm; pappi of 6–7 lanceolate to obovate or oblanceolate, often aristate scales 3–4 mm. 2n = 90.

Hymenoxys turneri K. F. Parker, Phytologia 20: 192. 1970

Tetraneuris turneri is a North American species of plants in the sunflower family, known by the common name Turner's four-nerve daisy. It has been found in the US state of Texas and in the nearby Mexican state of Coahuila.

Tetraneuris turneri is a perennial herb up to 50 cm (20 in) tall. It forms a branching underground caudex sometimes producing as many as 20 unbranched, above-ground stems, sometimes some of them leaning against other vegetation. The plant generally produces one flower head per stem. Each head has 12–24 yellow ray flowers surrounding 100–250 yellow disc flowers