Authors: L.
More or less clump-forming, the ascending to erect stems 30-60cm high. Leaves narrowly obovate to almost oblong, up to 10cm long, glabrous (despite the name), deep green, sometimes described as having a silvery patina. Flowers in small terminal clusters, somewhat inflated with erect lobes, greenish-white to purplish-green, late summer to autumn. Eastern North America in open deciduous and pine forest usually where the soil stays moist. Not a rock garden species, but has quite handsome foliage.
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