Spreading Leastdaisy

Perennials, 20–80 cm, eglandular; fibrous-rooted, with caudexlike, lignescent rhizomes. Leaves not densely overlapping, proximal and mid cauline blades oblong to lanceolate-oblong, 10–20 × 6–12 mm, abruptly reduced distally, herbaceous, bases truncate to subcordate, subclasping, flat, faces sparsely hispidulous to hispido-pilose. Involucres conic to broadly cylindric, 3–4.5 × 2–2.5 mm. Ray florets 6–9; corollas white. Disc florets 4–7, functionally staminate. Cypselae 1.6–2.2 mm, 2(–3)-nerved (ray) or 3–5-nerved (disc), strigose; pappi in 1 series, thickened rings or minute, erose crowns less than 0.1 mm. 2n = 16.

Keerlia effusa A. Gray, Boston J. Nat. Hist. 6: 222. 1850

Chaetopappa effusa, called the spreading lazy daisy, or spreading leastdaisy, is a North American species of plants in the family Asteraceae. It has been found only in Texas, largely on the Edwards Plateau.