1030 LAMIACEAE 



notched. Stamens 4: filaments all anther-bearing : anthers 2-celled ; sacs mostly parallel. 

 Nutlets 3-angled, smooth. 



Leaf-blades coarsely crenate-serrate : upper lip of the corolla scarcely longer than the lower, puberulent. 



1. L. Marrubiastrum. 

 Leaf-blades 2-5-clef t : upper lip of the corolla much longer than the lower, villous. 2. L. Cardiaca. 



1. Leonurus Marrubiastrum L. Biennial, puberulent or pubescent. Steins 5-15 

 dm. tall, more or less branched : leaf-blades ovate to oblong-ovate, 2.5-7. 5 cm. long, crenate 

 or incised-crenate, cuneately narrowed at the base, petioled : cymes dense, often numerous : 

 calyx puberulent or glabrate ; lobes subulate-setaceous, shorter than the tube : corolla 

 white or nearly so, 7-8 mm. long ; tube glabrous within. 



In waste places. New Jersey and Pennsylvania to Florida. Summer and fall. 



2. Leonurus Cardiaca L. Perennial, more or less pubescent. Stems erect, 3-10 

 dm. tall, simple or branching above : leaf-blades 2-10 cm. long, palmately cleft or incised 

 or 3-cleft on the upper part of stem, the lobes acute, entire or sharply toothed or crenate : 

 clusters few-flowered, sessile : calyx rigid, becoming about 5 mm. long, angled : lobes 

 spine-like, 3 ascending, 2 erect -spread ing : corolla pale purple or white, villous without, 

 9-10 mm. long ; tube swollen in middle, the upper lip as long as the tube, the lower lip 

 reflexed : nutlets 2 mm. long, pubescent on top. 



In waste places and along roadsides, Nova Scotia to Minnesota, North Carolina and Nebraska. 

 Naturalized from Europe. Spring to fall. 



19. LEONOTIS L. 



Annual or perennial caulescent herbs or shrubby plants. Leaves opposite : blades 

 broad, toothed, petioled. Flowers in dense whorls. Calyx short-pedicelled : tube 10- 

 nerved, oblique at the mouth : lobes 8-10, unequal, bristle-tipped. Corolla yellow, orange 

 or scarlet, 2-lipped : tube dilated above, curved : upper lip erect, rather long : lower lip 

 with 3 lobes, the middle lobe scarcely longer than the lateral. Stamens 4 : filaments all an- 

 ther-bearing : anthers 2-celled ; sacs diverging. Nutlets 3-angled, smooth. 



1. Leonotis nepetaefolia K. Br. Annual, softly pubescent. Stems 3-20 dm. tall, 

 simple or branched : leaf-blades ovate or ovate-deltoid, 4-12 cm, long, coarsely crenat 

 cuneate or subcordate at the base : clusters dense, 4-6 cm. in diameter : pedicels 1-2 mr 

 long : calyx puberulent, becoming at least 2 cm. long ; tube reticulated above the middle 

 lobes 8, awn-tipped : corolla scarlet or orange-yellow, 2-2.5 cm. long, villous-hirsute ; tube 

 curved, the upper lip as long as the tube, the lower lip much shorter than the upper, with 

 3 narrow lobes : nutlets 3 mm. long, sharply angled. 



In waste places, Tennessee to Florida and Louisiana. Also in the tropics. Summer and fall. 



20. STACHYS L. 



Annual or perennial caulescent herbs, with glabrous or variously pubescent foliaj 

 Leaves opposite : blades entire or toothed, commonly petioled. Flowers in axillary clus 

 ters, the upper ones sometimes approximate or contiguous. Calyx mostly campanulate 

 tube 5-10-ribbed : lobes 5, equal or nearly so. Corolla purple or white or rarely red 

 yellow, 2-lipped : upper lip erect, entire or notched : lower lip spreading, with 3 lobes, tl 

 middle lobe largest, entire or 2-lobed. Stamens 4 : filaments all anther-bearing : anth< 

 2-celled ; sacs mostly diverging. Nutlets blunt at the apex. . 

 Plants with annual or biennial roots. 



Lower lip of the corolla slightly surpassing the calyx : mature calyx 3-4 mm. long. 



1. S. agraria. 



Lower lip of the corolla much surpassing the calyx : mature calyx 5-6 mm. long. 2. S. Drummo 

 Plants with perennial roots. 



Leaf-blades narrowed at the base. 



Leaf-blades glabrous, entire or with shallow teeth : calyx-lobes glabrous at 



maturity. 



Calyx-lobes subulate-tipped : leaf-blades entire or nearly so. 3. -S'. hyssoptfolui. 



Calyx-lobes not subulate-tipped : leaf-blades markedly but shallowly 



toothed. 4. S. lythroides. 



Leaf-blades pubescent, prominently serrate : calyx-lobes ciliate. 5. S. ambigua. 



Leaf-blades, all or some of them, cordate or truncate at the base. 

 A. Petioles less than % as long as the blades. 



Lower leaves with petioles but little longer than those of the upper. 



Foliage copiously pubescent : corolla-tube slightly longer than the calyx. 



6. 5. Nuttallii. 



Foliage glabrous or almost so : corolla-tube much longer than the calyx. 7. S. latidens. 

 Lower leaves with petioles several times longer than those of the upper. 

 a. Calyx-lobes merely acute or acuminate, not awn-tipped. 

 * Foliage of the inflorescence glabrous or bristly-pubescent. 



Inflorescence glabrous or nearly so. 8. S. tenitifolia. 



Inflorescence bristly-pubescent. 9. S. aspera. 



