Cal cleft to near the base, exappendiculate, accrescent and subrotate at maturity; cor campanulate, white to lavender, about equaling or slightly surpassed by the cor, cleft to half its length; ovules 2 on each of the 2 expanded parietal placentas; fr unilocular, 2-valved; seeds finely reticulate, without a cucullus; small, branching annuals with pinnatifid lvs, at least the lower ones opposite, the fls solitary in or opposite the axils, the stem sometimes also terminating in a lax, few-fld infl. Monospecific.
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