Erect to sprawling annual herb, 0.08-0.25 m tall; single-stemmed or well branched at the base, branches spreading to decumbent. Leaves cauline, alternate, 12.0-40.0 x 5.0-15.0 mm, bipinnate, glandular-punctate, sparsely pilose; lobes lanceolate to linear, 1.0-8.0 × ±0.5-1.5 mm, mucronate. Capitula radiate, heterogamous, ca. 20-35 mm in diam., solitary; peduncle 40-140 mm long at anthesis, sparsely pilose. Involucre hemispherical to sometimes campanulate, 4.0-5.0 x 10.0-15.0 mm, glabrous; involucre bracts 4-to 6-seriate, margins and apices somewhat scarious; outer bracts ovate, 1.0-1.5 mm long, acute, outlined purplish black; middle bracts ovate, 2.0-3.0 mm long, acute, some outlined purplish black; inner bracts ovate, 3.0-4.0 mm long, without dark markings, apical appendages ovate to broadly ovate, obtuse. Receptacle paleate. Paleae scarious, apically with elliptic appendages, heteromorphic; outer broadly oblong, appendages narrower than limb; inner lorate, appendages only slightly broader than limb; appendages shorter than or equal to florets, not enclosing developing florets. Ray florets neuter, 12 to 20; lamina 6-12 mm long, yellow. Disc florets bisexual, numerous, yellow, 5-lobed; lobes cucullate, with sessile glandular trichomes. Anthers slightly sagittate at base; apical appendages cordate. Style terete; branches linear, truncate, sweeping hairs apically-dorsally. Pappus biseriate, white, outer scales 5, transversely obovate, inner scales 5, setaceous, unequally developed, some rudimentary. Cypselas oblanceolate, geniculate, ±3.0 x 1 mm, heteromorphic, scattered, most white, granulate, some black, rugose.
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