LABIATiE 



6. PRUNELLA. Self-He al. 



119 



Calyx 2-lipped, closed in fruit; corolla 2-Jipped, the upper entire, 

 arched, and the lower 3-lobed; stamens 4, ascending under the 

 upper lip, filaments of the longer 2-toothed at the summit, one 

 tooth bearing the anther, the other with none. Low, often procum- 

 bent herbs with purple or whitish flowers in dense leafy terminal or 

 axillary spikes. 



1. P. vulgaris, L. 



Leaves ovate or oblong, pubescent or smooth; corolla violet-purple; 

 calyx purplish; procumbent or erect. Moist grassy places, Man.-Alta. 



7. PHYSOSTSGIA. False Dragon Head. 



Calyx equally 5-toothed, slightly inflated in fruit; corolla much 

 longer than the calyx, strongly 2-lipped, the upper somewhat arched, 

 entire, and the lower 3-lobed; stamens 4, ascending under the 

 arch of the upper lip, the filaments pubescent. Erect, usually 

 glabrous herbs with entire 'serrate leaves, and showy flowers in 

 naked, often panicled, terminal spikes. 



1. P. virgini&na, (L.) Benth. 



Stem 1-4 ft. high; leaves thickish, sharp-serrate; flowers rose-color or 

 pale purple. Edges of streams or lakes, Man. and westward. 



2. P. parvifldra, Nutt. 



Stem 1-3 ft. high, simple up to the flowers; leaves thin, lanceolate, serrate 

 or dentate; flowers bright rose-purple in short, rather dense spikes. Wet 

 places, Man.-Alta. 



8. STACHYS. Hedge Nettle. 



Calyx 5-toothed, the teeth about equal; corolla strongly 2-Iipped, 

 the upper erect, entire, slightly arched or concave, the lower spread- 

 ing, 3-cleft, the middle lobe sometimes notched, tube small, no longer 

 than the calyx; stamens 4, ascending under the upper lip of corolla. 

 Erect or diffuse perennials with flowers in spikes, both terminal and 

 in the upper axils. 



1. S. palfistris, L. 



Erect, pubescent, from a somewhat tuberous rootstook, frequently 

 stolonif erous ; calyx hispid, with somewhat spiny teeth diverging in fruit 

 corolla purplish or reddish. Marshy ground, Man.-Alta, 



