LABIATE. 271 



in aestivation overlapping the lower. Stamens 4, didynamous, 

 (2 being sometimes abortive,^ inserted on the corol, alternate 

 with the lobes, of the lower lip ; anthers 2-celled, sometimes 

 apparently 1-celled, either by the obliteration of the septum or 

 by the abortion of a cell. Ovary free, deeply 4-lobed ; ovules 

 4; style 1, proceeding from the base of the lobes; stigma 

 bifid, usually acute, sometimes .unequal or dilated. Fruit 

 I 4 small nuts, enclosed within the persistent calyx. Seeds 

 erect, with little or no albumen ; embryo erect; cotyledons. 

 flat. :'^\ 



Herbs or undersJirubs with square stems and opposite 

 branches. Reaves opposite, without stipules. 



Div. I. MENTHOIDE.E. 



1. LYCOPUS. Linn. 



Calyx tubular, 5-cleft, mouth naked. Corol tubular, near- 

 ly equal, 4-lobed ; upper segments - broader and notched. 

 Stamens 2, distant, simple. Diandria. Monogynia. 



1. L. europ&us Linn. : leaves narrow, lanceolate, serrate ; calyx 5- 

 cleft with the segments acuminate, longer than the seed. L. america- 

 nus Muhl.L. europ&us va,r..angiistifolius Torr. 



HAB. Moist places. N. Y. to Car. Aug. I/. Stem erect, 

 12 feet high, square. Leaves opposite, upper ones slightly, 

 lower ones deeply toothed. Floicers in dense whorls, white. 

 Calyx with spines, longer than the seed. Water Horehound', 



2. L. virginicus Linn. : leaves broad-lanceolate, serrate, tapering and 

 entire at the base ; calyx shorter than the seed, spineless. 



HAB. Wet places. Can. to Car. W. to Rocky Mountains. 

 June Aug. 1[.-*Stem pubescent. Leaves op-posite, sessile, 

 variously toothed. Flowers in small whorls. Calyx unarmed.' 

 Formerly in high reputation as a remedy in haemoptysis. 



Bugle Weed. 



3. L. uniflorus . Mich. : plant small ; root tuberous ; stem simple ; 

 leaves oval, obtuse, obsoletely toothed ; axils 1-flowered. 



HAB. Perm. Muhl. Augf ! Root tuberous ; sudtcrs pro- 

 cumbent, leafy. Stem about 3 inches high, rather smooth. 

 Leaves oil petioles, with few teeth. Flowers axillary, solitary. 

 Mick. An obscure species, perhaps only a variety of the form- 

 er. 



2. ISANTHUS. Mich. 



Calyx subcampanulate. Corol 5-parted ; tube ' straight 

 and narrow ; segments of the border ovate and equal. Sta- 

 mens subequal, Stigma linear, recurved. 



Didynamia. Gymnospermia. 



