Small perennial rootstock from which arise numerous erect slender rather rigid simple or branched glabrous shoots 30-45 cm high, the lower part copiously leafy, the leaves becoming fewer and smaller in the upper half which is mainly inflorescence. Leaves very slender, 5 mm long more or less, sometimes up to 1 cm long, imparipinnate, the 2-4 lateral lobes opposite or subopposite, the rachis and lobes filiform, minutely apiculate, the upper leaves often merely slightly 3-lobed at the tip. Inflorescence a much-branched rather tangled cymose panicle, the branches subtended by filiform simple or slightly lobed bracts, the very slender axes diverging at about a right angle, the terminal parts of the inflorescence having a false-dichotomous appearance. Calyx 3 mm long, the lobes slightly recurved, apiculate. Corolla narrowly campanulate, pale blue, the tube c. 5 mm long, the lobes 2 mm long.
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