Morphology

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Description

Plants perennial, glabrous or minutely papillose-pubescent, with stout, creeping rhizome. Stems erect, branched above middle, 60-100 cm. Leaves: ocrea mostly deciduous or sometimes partially persistent at maturity; blade usually ovate-orbiculate, sometimes orbiculate or broadly ovate, 20-40 × 20-35 cm, base deeply and widely cordate, margins entire, flat or slightly undulate, apex obtuse. Inflorescences terminal, occupying distal 1/ 2 of stem, rather dense, widely paniculate to fusiform. Pedicels articulated at middle or in proximal 3, filiform, 3-9 mm, articulation distinctly swollen. Flowers 10-20 in whorls; inner tepals ovate or ovate-triangular, 4-5(-6) × 3-5 mm, base truncate or slightly cordate, margins entire or subentire, apex obtuse or subobtuse; tubercles absent. Achenes brown to brownish green, 2.5-3.5 × 1-2 mm. 2n = 20.

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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Source: Missouri Botanical Garden

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