Prunella vulgaris heal-all; self-heal Lamiaceae PRVU; Bx, pb, vc; NY; Q, cu, j; K, fl, p; R, js, lp, lt, sv, w, wt;

 

Prunella vulgaris.commons.wikimedia.org 3

Prunella vulgaris.commons.wikimedia.org (Accessed 6/2015).

Prunella vulgaris is a perennial herb, to 50 cm prostrate to suberect from creeping rhizome, tufted, stems sparsely or not branched, square, two side grooved, angles rounded. 

Leaves opposite , stalk 1-3 cm long, slightly winged, blade narrowly elliptic, to 9 cm long, 4 cm wide, lower leaves broadest, base of blade tapering to stalk, margin entire or vaguely toothed. 

Flowers purple, bilaterally symmetrical, petal tube 2-lipped, upper lip helmet-shaped (galeate), mostly unlobed, lower lip 3-lobed, shorter than upper lip; stamens 4, filament tips ca 2-toothed; calyx 0.7-1 cm long, green-purple, hairy, 2-lipped, 5-lobed, upper lip shallowly 3-toothed, lobes pointed; flowers interspersed with hairy, broad-based bracts to about 1 cm long and wide; inflorescence a spike 2-5 cm long, 2 cm wide, at ends of stems; blooming and fruiting June-Nov., found blooming Aug. 13 in wet woods. 

Fruit dry, small, nut-like, surface smooth. 

Wetland status: FACU+. 

Frequency in NYC: Occasional. 

Prunella vulgaris.commons.wikimedia.org 2

Prunella vulgaris.commons.wikimedia.org

Origin: Native and European varieties very similar, the native variety Pv. var. lanceolata has mid-stem leaves about a third as wide as long, the European Pv. var. vulgaris has wider leaves, about a half as wide as long. 

Habitat: Wooded or open, disturbed areas, trail margins. Euopean variety mostly in diturbed sites, soil pH 5.4-8 (USDA, NRCS 2009).