Physostegia

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Standard Cyclopedia of Horticulture

Physostegia (Greek, bladder and covering, referring to the inflated fruiting calyx). Labiatae. False Dragon-head. Hardy herbaceous perennials, native to America, with spikes of gaping flowers of purple, rose-color, or white; useful in borders and particularly in wild-gardens.

Smooth erect herbs with slender and wand-like sts.: lvs. opposite, sessile, mostly lanceolate or oblong and usually serrate or dentate: fls. showy, pink to purple and varying to white, in separate or panicled spikes; calyx bell-shaped, swollen and remaining open in fr., membranous, 10-nerved; teeth 5, equal; corolla 2-lipped, inflated above; upper lip concave, rounded, entire or nearly so; lower lip 3-lobed, the middle lobe commonly notched; stamens 4, didynamous; anther-cells parallel. A few species, N. Amer., mostly along stream banks and in wet grounds, but thriving under good upland garden conditions; sometimes named under Dracocephalum. P. austriaca of lists is probably Dracocephalum austriacum. CH


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