133 LARIATAE. 



LEONURUS L. Ours » perennial. Flowers in close axillary whorls. 

 Calyx 5-nerved, with 5 spine-tipped teeth. Corolla 2-lipped; upper oblong, 

 arched, entire; lower spreading-, 3-lobed. Stamerrs 4, ascending under the 

 upper lip. Nutlets truncate, 3-angled. 



L. cardiaca L. Motherwort. Stem 2-5 feet high, more or less pubescent; 

 leaves petioled, palmately 3-5-cleft. lobes cut-toothed or incised, base cuneate 

 to cordate; corolla purple, pink or white, upper lip bearded. Waste places 

 near dwellings; June-September; frequent in the eastern counties; Winne- 

 shiek, Johnson, Des Moines, Appanoose, Decatur, and Fremont counties; 

 reported from Payette, Scott, Muscatine, and Story counties. 



LAMIUM L. A decumbent herb, with mostly cordate incised or doubly- 

 toothed long-petioled or sessile leaves, and small purplish flowers in axillary 

 clusters. Calyx 5-nerved, 5-toothed, awl-pointed. Corolla dilated in the 

 throat, 2-lipped; upper lip oblong, arched, galeate; lower spreading, 3-lobed, 

 middle lobe emarginate. Nutlets truncate at the apex. 



L. amplexicaule L. Dend-Xcttlc. An Old World weed reported from Lee 

 county. 



GALEOPSIS L. Annual, with spreading branches, and many-flowered 

 axillary whorls. Calyx tubular-campanulate, 5-nerved, 5-toothed, spineseent. 

 Corolla 2-lipped, throat dilated; upper lip arched, nearly entire; Lower spread- 

 in" 1 , 3-cleft, middle lobe obcordate, palate with 2 teeth at the sinuses. Sta- 

 mens 4, ascending under the upper lip. exserted. 



Q. tetrahit L. Hemp-Nettle. Stem 1-3 feet high, hispid, swollen below the 

 joints; leaves ovate, thin, acuminate, coarsely serrate, petioled; corolla pur- 

 plish, twice the length of the calyx. Waste places; June-Sept3mber; infre- 

 quent; Winneshiek county. 



STACHYS L. Hedge-Nettlk. Ours perennials, with the whorls 2-many- 

 flowered, collected into a terminal raceme or spike. Calyx tubular-campanu- 

 late, 5-10-nerved, 5-toothed. Corolla 2-lipped; upper lip arched, entire, pubes- 

 cent; lower spreading, 3-lobed; throat not dilated. "Stamens 4, ascending, 

 often deflexed to the sides of the throat. Nutlets obtuse. 



S. aspera Mx. Stem 1-4 feet hin-h. retrorsely hispid to nearly glabrous; 

 leaves thin, oblong-ovate to oblong-lanceolate-, acuminate, obtusely serrate, 

 distinctly petioled; flowers in a slender interrupted spike; calyx glabrous or 

 with a few bristles; corolla red-purple. Low places; July-September; com- 

 mon; Winneshiek, Johnson, Henry, Union, Montgomery, and Shelby counties; 

 reported from Fayette, Story, Emmet, Sioux, and Woodbury counties. 



S. palustris L. Stem 1-4 feet high, densely hirsute with spreading or 

 reflexed hairs or roughi&h-hirsute on the angles; leaves ovate-lanceolate to 

 oblong-lanceolate, crenate-serrate, acuminate, sessile or short-petioleJ, hairy 

 or pubescent especially beneath; calyx pubescent or hirsute. Low places; 

 June-August; frequent; Dubuque, Jackson, Johnson, Appanoose; Decatur, 

 Ringgold, and Story counties; reported from Fayette and Scott counties. 

 PL ANT AGIN ACE AE J Audi. Plantain Family. 



Low herbs, with radical leaves, and regular 4-merous flowers in scapose 

 spikes. Stamens 4, inserted on the corolla-tube and alternate with its 

 lobes, exserted or sometimes included. Ovary free, 2-4-celled. Fruit a 

 membranous capsule. 



PLANTAGO L. Plantain. Annuals or perennials with ribbed leaves. 

 Calyx of 4 membranous imbricated persistent sepals. Corolla withering-per- 



