Tetraneuris linearifolia var. linearifolia (Hook.) Greene
Family: Asteraceae
fineleaf fournerved daisy
[Hymenoxys linearifolia Hook.,  more...]
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Plants 16-40+ cm. Stems 1(-6), erect, branched distally. Leaves ± hairy, sparsely to densely gland-dotted; basal blades spatulate to oblanceolate, entire or with 2(-6) teeth or lobes; proximal cauline blades narrowly spatulate to linear-oblanceolate, entire or with 1-2 teeth or lobes; mid blades linear-oblanceolate to linear, (0.9-)1.4-3(-4.8) mm wide. Peduncles (8-)9-14(-19) cm, ± hairy. Involucres (5-)6-7.8(-9) × (7-)8-11(-12) mm. Outer phyllaries 8-16, margins often scarious, abaxial faces ± hairy. Ray florets 9-20. Cypselae 1.5-2.1(-2.5) mm; pappi of 4-7 aristate scales 1.2-1.9(-2.5) mm. 2n = 28, 30.

Flowering (Jan-)Apr-Jul(-Dec). Roadsides, hillsides, pastures, open areas, edges of woods; 30-2700 m; Kans., N.Mex., Okla., Tex.; Mexico (Coahuila, Nuevo León, Tamaulipas).