746 LAMIACEAE 



3-lobed, with broad middle lobe. Stamens 4, but 2 sterile; fertile stamens with 

 forked filaments, one prong bearing the 2-celled anthers. Nutlets smooth. 



1. P. vulgaris L. Stem procmnbent or ascending or erect, 0.5-5 dm. high; 

 leaf -blades ovate, oblong, or lanceolate, entire or crenate, 2-10 cm. long; spike 

 terminal, very dense, 1-3 cm. long in flower, or 5-10 cm. in fruit; bracts broadly 

 ovate-orbicular, cuspidate; corolla violet or purple, 8-12 mm. long. Woods and 

 wet places among bushes: Newf.^Fla. — Calif. — ^B.C; nat. from Eurasia. 

 Plain — Mont. My-0. 



12. DRACOCEPHALUM (Tourn.) L. False Dragon-head. 



Perennial herbs, with mostlj' simple stems. Leaves opposite, glabrous, 

 rather narrow, usually toothed. Calyx campanulate, 5-ribbed, more or les? 

 iriflated; lobes 5, nearly equal. Corolla purple, pink, or white, 2-lipped; tube 

 dilated upwards; upper lip entire; lower lip 3-lobed, with the middle lobe emar- 

 ginate. Stamens 4, all fertile; anthers 2-ceIled; sacs parallel. Nutlets smo-th, 

 3-angled. [Physostrgia Benth.] 



1. D. Nuttallii Britton. Stem simple, 3-10 dm. high, glabrous; leaves 

 lanceolate, oblong, or linear, dentate, the upper sessile, 7-10 cm. long; spike 2-10 

 cm. long; calyx campanulate, with ovate, obtuse teeth; corolla ])urple, about 1 

 cm. long. Physostegia parviflora Nutt. Banks of streams and among bushes: 

 Sask. — Minn. — Colo. — Ore. — B.C. Plain — Submont. Jl-Au. 



13. LEONURUS L. Motherwort. 



Annual or perennial caulescent herbs. Leaves opposite, toothed, or pal- 

 matety cleft or parted. Flowers perfect, irregular, in dense axillary clusters. 

 Calyx tubular-campanulate, 5-ribbed; lobes 5, nearly equal, subulate or awn- 

 tipped. Corolla white or pink, 2-lipped; upper lip erect, nearly flat; lower lip 

 spreading, 3-lobed; middle lobe broad, truncate, or notched. Stamens 4, all 

 fertile; anthers 2-celled; sacs mostly parallel. Nutlets smooth, 3-angled. 



1. L. Cardiaca L. Perennial; stem erect, 3-10 dm. high, strigose-puberu- 

 lent; leaf-blades 2-10 cm. long, palmately 3-5-cleft, with lanceolate, more or 

 less acuminate, entire or toothed lobes; calyx 5-angled; lobes spinulose; corolla 

 pale purple or white, villous without, 9-10 mm. long. Waste places: N.S. — N.C. 

 — Tex. — Utah. — Mont. Plain — Submont. Je-Au. 



14. LAMIUM L. Dead Nettle, Henbit. 



Annual or perennial caulescent herbs, with branched stems. Leaves opposite, 

 petioled, usually broad, toothed or incised. Flowers perfect, irregular, in remote 

 axillary clusters. Calyx campanulate, 5-nerved; lobes 5, equal or the upper 

 somewhat longer. CoroUa purple, blue, or white, 2-hpped; upper lip erect, 

 concave, entire; lower lip 3-lobed; lateral lobes narrow, the middle one dilated 

 and notched. Stamens 4, all fertile; anthers 2-celled; sacs divergent. Nutlets 

 smooth or tuberculate. 



1. L. amplexicaule L. Annual or biennial; stem slender, weak, branched 

 from the base and lower axils, usually decumbent, 1-5 dm. long, glabrous; leaf- 

 blades orbicular, cordate, or reniform, 1-4 cm. broad, crenate, tlic upper sessile 

 and more or less clasping; flowers axillary; corolla purphsh or red, 12-16 mm. 

 long; middle lobe of the lower lip spotted. Waste places and cultivated ground: 

 N.B.— Flu.— Utah— Calif.— B.C.; adv. from Eu. 



15. STACHYS (Tourn.) L. Hedge Nettle. 



Annual or perennial herbs, ours with rootstocks. Leaves opposite, in ours: 

 petioled and toothed. Flowers i)erfect, in axillary clusters, sometimes approxi- 

 mate, forming leafy si)ikes. Calyx mostly camj)anulate, .5-10-ribbed, 5-lobed. 

 Corolla purple, pink, or white, 2-lipped; upper lij) erect, entire or notched; lower 

 lip s])reading, 3-lobed; middle lobe largest, often 2-lobed. Stamens 4; anthers 

 all fertile, 2-celled; anther-sacs divergent or parallel; filaments naked. Nutlets 

 obtuse, not truncate at the apex, smooth. 



