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DescriptionErect perennial or long-lived annual growing from a semi-woody rootstock. Stem up to 1.7m, hollow, branched above or sometimes from the base. Leaves sessile, linear to narrowly elliptic, sometimes with 1-3 pairs of lobes near the base; midrib prominent beneath. Capitula numerous in a lax, branched panicle. Florets 10-25 per capitulum, yellow.