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hyaline, ciliolate, green zones lanceolate, apices acute to acuminate or caudate, mucronulate or apiculate, sometimes purplish, faces glabous. Ray-florets

margins serrate to serrulate, scabridulous, apices acute to acuminate, sometimes caudate, mucronulate, abaxial faces glabrous, midveins usually ± densely pilose

(particularly var. hesperium), apices acute to acuminate (outer) or acuminate to caudate (inner), mostly mucronulate, abaxial faces glabrous, adaxial sparsely

crenate-serrate, apices acute to acuminate or short-caudate; distal sessile, blades elliptic-lanceolate to oblanceolate or lanceolate, (6–) 10–80+ × 2–25

architecture","body architecture or pubescence or relief","body architecture or shape","body relief","branch arrangement or course or shape","branch structure

apical green zones diamond-shaped, apices acute to acuminate or caudate (then tips often involute), mucronulate to apiculate, faces glabrous. Ray-florets (10–)

Subshrubs or herbs, annual (fibrous-rooted or taprooted) or perennial (rhizomatous), terrestrial or semiaquatic. Stems prostrate to decumbent or erect, terete