Stems erect to decumbent, subsimple or branched, densely to sparsely pilose; leaves tripartite, the lower more densely pubescent than the upper, the segments oblanceolate to cuneate-obovate, multifid or incised-dentate; stipules foliaceous, 2-to 4-lobed or cleft, often with the sessile upper leaves forming many-lobed or perfoliate "leaves"; flowers aggregated in small axillary and terminal cymes, usually very short-pedicellate; hypanthium glabrous or nearly so at least at maturity, the outer lobes about equalling the inner; flowers in Panamanian material less than 2 mm. long; achenes 1-3.
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